./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ff03de63 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 18:01:16,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 18:01:16,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 18:01:16,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 18:01:16,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 18:01:16,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 18:01:16,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 18:01:16,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 18:01:16,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 18:01:16,999 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 18:01:16,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 18:01:17,001 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 18:01:17,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 18:01:17,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 18:01:17,004 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 18:01:17,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 18:01:17,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 18:01:17,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 18:01:17,009 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 18:01:17,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 18:01:17,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 18:01:17,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 18:01:17,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 18:01:17,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 18:01:17,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 18:01:17,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 18:01:17,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 18:01:17,029 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 18:01:17,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 18:01:17,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 18:01:17,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 18:01:17,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 18:01:17,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 18:01:17,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 18:01:17,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 18:01:17,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 18:01:17,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 18:01:17,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 18:01:17,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 18:01:17,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 18:01:17,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 18:01:17,037 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-21 18:01:17,064 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 18:01:17,064 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 18:01:17,064 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 18:01:17,064 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 18:01:17,065 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 18:01:17,065 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 18:01:17,065 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 18:01:17,065 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 18:01:17,066 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 18:01:17,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 18:01:17,066 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 18:01:17,066 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 18:01:17,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 18:01:17,066 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 18:01:17,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 18:01:17,066 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 18:01:17,066 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 18:01:17,066 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 18:01:17,066 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 18:01:17,066 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 18:01:17,066 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 18:01:17,067 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 18:01:17,067 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 18:01:17,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 18:01:17,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 18:01:17,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:01:17,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 18:01:17,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 18:01:17,067 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 18:01:17,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 18:01:17,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 18:01:17,067 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e [2021-12-21 18:01:17,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 18:01:17,332 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 18:01:17,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 18:01:17,335 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 18:01:17,335 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 18:01:17,336 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2021-12-21 18:01:17,393 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad60617c2/ed825958175d49f4b7474d8ac636ed67/FLAG8b9c50628 [2021-12-21 18:01:17,837 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 18:01:17,839 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2021-12-21 18:01:17,857 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad60617c2/ed825958175d49f4b7474d8ac636ed67/FLAG8b9c50628 [2021-12-21 18:01:18,192 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad60617c2/ed825958175d49f4b7474d8ac636ed67 [2021-12-21 18:01:18,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 18:01:18,196 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 18:01:18,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 18:01:18,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 18:01:18,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 18:01:18,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:01:18" (1/1) ... [2021-12-21 18:01:18,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@88c8055 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:18, skipping insertion in model container [2021-12-21 18:01:18,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:01:18" (1/1) ... [2021-12-21 18:01:18,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 18:01:18,253 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:01:18,483 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:01:18,491 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 18:01:18,528 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:01:18,549 INFO L208 MainTranslator]: Completed translation [2021-12-21 18:01:18,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:18 WrapperNode [2021-12-21 18:01:18,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 18:01:18,550 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 18:01:18,551 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 18:01:18,552 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 18:01:18,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:18" (1/1) ... [2021-12-21 18:01:18,579 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:18" (1/1) ... [2021-12-21 18:01:18,604 INFO L137 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2021-12-21 18:01:18,604 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 18:01:18,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 18:01:18,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 18:01:18,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 18:01:18,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:18" (1/1) ... [2021-12-21 18:01:18,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:18" (1/1) ... [2021-12-21 18:01:18,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:18" (1/1) ... [2021-12-21 18:01:18,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:18" (1/1) ... [2021-12-21 18:01:18,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:18" (1/1) ... [2021-12-21 18:01:18,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:18" (1/1) ... [2021-12-21 18:01:18,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:18" (1/1) ... [2021-12-21 18:01:18,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 18:01:18,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 18:01:18,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 18:01:18,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 18:01:18,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:18" (1/1) ... [2021-12-21 18:01:18,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:01:18,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:18,666 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 18:01:18,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 18:01:18,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 18:01:18,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 18:01:18,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 18:01:18,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 18:01:18,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 18:01:18,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 18:01:18,784 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 18:01:18,785 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 18:01:18,979 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 18:01:18,985 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 18:01:18,985 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 18:01:18,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:01:18 BoogieIcfgContainer [2021-12-21 18:01:18,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 18:01:18,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 18:01:18,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 18:01:18,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 18:01:18,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 06:01:18" (1/3) ... [2021-12-21 18:01:18,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149fc2b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:01:18, skipping insertion in model container [2021-12-21 18:01:18,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:18" (2/3) ... [2021-12-21 18:01:18,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149fc2b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:01:18, skipping insertion in model container [2021-12-21 18:01:18,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:01:18" (3/3) ... [2021-12-21 18:01:18,995 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrspn-alloca-2.i [2021-12-21 18:01:18,999 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 18:01:18,999 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-12-21 18:01:19,046 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 18:01:19,053 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 18:01:19,054 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-12-21 18:01:19,067 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:19,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 18:01:19,076 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:19,077 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:19,078 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:19,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:19,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-12-21 18:01:19,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:19,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115441837] [2021-12-21 18:01:19,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:19,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:19,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:19,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115441837] [2021-12-21 18:01:19,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115441837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:19,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:19,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:01:19,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578337734] [2021-12-21 18:01:19,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:19,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:01:19,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:19,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:01:19,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:19,314 INFO L87 Difference]: Start difference. First operand has 43 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:19,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:19,370 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2021-12-21 18:01:19,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:01:19,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-21 18:01:19,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:19,378 INFO L225 Difference]: With dead ends: 78 [2021-12-21 18:01:19,378 INFO L226 Difference]: Without dead ends: 74 [2021-12-21 18:01:19,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:19,382 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 37 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:19,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 121 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:19,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-21 18:01:19,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 44. [2021-12-21 18:01:19,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:19,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-12-21 18:01:19,404 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 7 [2021-12-21 18:01:19,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:19,405 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-12-21 18:01:19,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:19,405 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-12-21 18:01:19,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 18:01:19,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:19,406 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:19,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 18:01:19,406 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:19,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:19,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-12-21 18:01:19,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:19,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226787681] [2021-12-21 18:01:19,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:19,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:19,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:19,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226787681] [2021-12-21 18:01:19,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226787681] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:19,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:19,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:01:19,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981283269] [2021-12-21 18:01:19,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:19,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:01:19,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:19,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:01:19,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:01:19,449 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:19,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:19,494 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-12-21 18:01:19,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:01:19,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-21 18:01:19,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:19,495 INFO L225 Difference]: With dead ends: 42 [2021-12-21 18:01:19,495 INFO L226 Difference]: Without dead ends: 42 [2021-12-21 18:01:19,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:01:19,496 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:19,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 34 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:19,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-21 18:01:19,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-21 18:01:19,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:19,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-12-21 18:01:19,501 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 7 [2021-12-21 18:01:19,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:19,501 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-12-21 18:01:19,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:19,501 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-12-21 18:01:19,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 18:01:19,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:19,502 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:19,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 18:01:19,502 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:19,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:19,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-12-21 18:01:19,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:19,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564879644] [2021-12-21 18:01:19,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:19,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:19,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:19,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:19,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564879644] [2021-12-21 18:01:19,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564879644] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:19,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:19,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:01:19,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137665234] [2021-12-21 18:01:19,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:19,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:01:19,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:19,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:01:19,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:19,606 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:19,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:19,656 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2021-12-21 18:01:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:01:19,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-21 18:01:19,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:19,658 INFO L225 Difference]: With dead ends: 75 [2021-12-21 18:01:19,658 INFO L226 Difference]: Without dead ends: 75 [2021-12-21 18:01:19,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:01:19,659 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:19,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 79 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:19,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-21 18:01:19,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 44. [2021-12-21 18:01:19,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:19,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-12-21 18:01:19,663 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 7 [2021-12-21 18:01:19,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:19,663 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-12-21 18:01:19,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:19,664 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-12-21 18:01:19,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 18:01:19,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:19,664 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:19,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 18:01:19,665 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:19,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:19,665 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-12-21 18:01:19,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:19,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221397428] [2021-12-21 18:01:19,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:19,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:19,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:19,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:19,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221397428] [2021-12-21 18:01:19,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221397428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:19,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:19,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:01:19,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133380014] [2021-12-21 18:01:19,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:19,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:01:19,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:19,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:01:19,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:01:19,734 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:19,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:19,805 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-12-21 18:01:19,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:01:19,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-21 18:01:19,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:19,809 INFO L225 Difference]: With dead ends: 72 [2021-12-21 18:01:19,809 INFO L226 Difference]: Without dead ends: 72 [2021-12-21 18:01:19,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:01:19,810 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 94 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:19,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 121 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:01:19,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-21 18:01:19,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2021-12-21 18:01:19,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:19,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-12-21 18:01:19,814 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 9 [2021-12-21 18:01:19,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:19,814 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-12-21 18:01:19,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:19,814 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-12-21 18:01:19,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 18:01:19,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:19,815 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:19,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 18:01:19,815 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:19,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:19,816 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-12-21 18:01:19,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:19,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953166166] [2021-12-21 18:01:19,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:19,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:19,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:19,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:19,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953166166] [2021-12-21 18:01:19,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953166166] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:19,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:19,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:01:19,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463528800] [2021-12-21 18:01:19,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:19,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:01:19,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:19,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:01:19,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:19,866 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:19,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:19,885 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2021-12-21 18:01:19,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:01:19,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-21 18:01:19,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:19,886 INFO L225 Difference]: With dead ends: 87 [2021-12-21 18:01:19,887 INFO L226 Difference]: Without dead ends: 87 [2021-12-21 18:01:19,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:19,888 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 30 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:19,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 108 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:19,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-21 18:01:19,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 63. [2021-12-21 18:01:19,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:19,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-12-21 18:01:19,892 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 9 [2021-12-21 18:01:19,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:19,893 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-12-21 18:01:19,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:19,893 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-12-21 18:01:19,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 18:01:19,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:19,893 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:19,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 18:01:19,894 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:19,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:19,894 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-12-21 18:01:19,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:19,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581326943] [2021-12-21 18:01:19,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:19,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:19,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:19,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:19,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581326943] [2021-12-21 18:01:19,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581326943] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:19,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:19,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:01:19,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827067905] [2021-12-21 18:01:19,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:19,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:01:19,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:19,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:01:19,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:01:19,946 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:19,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:19,964 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2021-12-21 18:01:19,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:01:19,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-21 18:01:19,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:19,966 INFO L225 Difference]: With dead ends: 61 [2021-12-21 18:01:19,966 INFO L226 Difference]: Without dead ends: 61 [2021-12-21 18:01:19,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:01:19,967 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:19,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 34 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:19,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-21 18:01:19,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-12-21 18:01:19,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:19,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2021-12-21 18:01:19,973 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 9 [2021-12-21 18:01:19,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:19,974 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2021-12-21 18:01:19,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:19,974 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2021-12-21 18:01:19,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 18:01:19,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:19,975 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:19,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 18:01:19,976 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:19,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:19,976 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-12-21 18:01:19,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:19,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011397940] [2021-12-21 18:01:19,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:19,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:20,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:20,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011397940] [2021-12-21 18:01:20,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011397940] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:20,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:20,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:01:20,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111989816] [2021-12-21 18:01:20,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:20,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:01:20,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:20,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:01:20,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:01:20,055 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:20,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:20,104 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2021-12-21 18:01:20,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:01:20,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-21 18:01:20,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:20,105 INFO L225 Difference]: With dead ends: 91 [2021-12-21 18:01:20,105 INFO L226 Difference]: Without dead ends: 91 [2021-12-21 18:01:20,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:01:20,106 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 88 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:20,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 70 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:20,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-21 18:01:20,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 65. [2021-12-21 18:01:20,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 64 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) [2021-12-21 18:01:20,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2021-12-21 18:01:20,110 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 9 [2021-12-21 18:01:20,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:20,110 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2021-12-21 18:01:20,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:20,111 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2021-12-21 18:01:20,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 18:01:20,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:20,111 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:20,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 18:01:20,111 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:20,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:20,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1241130402, now seen corresponding path program 1 times [2021-12-21 18:01:20,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:20,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424029656] [2021-12-21 18:01:20,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:20,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:20,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:20,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:20,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424029656] [2021-12-21 18:01:20,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424029656] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:20,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:20,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:01:20,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963525481] [2021-12-21 18:01:20,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:20,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:01:20,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:20,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:01:20,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:20,147 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:20,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:20,165 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2021-12-21 18:01:20,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:01:20,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-21 18:01:20,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:20,166 INFO L225 Difference]: With dead ends: 64 [2021-12-21 18:01:20,166 INFO L226 Difference]: Without dead ends: 64 [2021-12-21 18:01:20,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:20,167 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 36 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:20,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 30 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:20,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-21 18:01:20,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2021-12-21 18:01:20,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 53 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) [2021-12-21 18:01:20,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-12-21 18:01:20,171 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 9 [2021-12-21 18:01:20,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:20,171 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-12-21 18:01:20,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:20,171 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-12-21 18:01:20,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 18:01:20,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:20,172 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:20,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 18:01:20,172 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:20,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:20,173 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-12-21 18:01:20,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:20,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087417387] [2021-12-21 18:01:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:20,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:20,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:20,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087417387] [2021-12-21 18:01:20,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087417387] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:20,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:20,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:01:20,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989031118] [2021-12-21 18:01:20,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:20,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:01:20,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:20,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:01:20,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:20,216 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:20,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:20,232 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2021-12-21 18:01:20,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:01:20,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-21 18:01:20,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:20,234 INFO L225 Difference]: With dead ends: 53 [2021-12-21 18:01:20,234 INFO L226 Difference]: Without dead ends: 53 [2021-12-21 18:01:20,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:20,239 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:20,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 32 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:20,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-21 18:01:20,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-21 18:01:20,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.391304347826087) internal successors, (64), 52 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:20,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2021-12-21 18:01:20,248 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 10 [2021-12-21 18:01:20,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:20,248 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2021-12-21 18:01:20,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:20,249 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2021-12-21 18:01:20,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 18:01:20,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:20,249 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:20,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 18:01:20,249 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:20,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:20,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-12-21 18:01:20,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:20,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542289319] [2021-12-21 18:01:20,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:20,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:20,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:20,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542289319] [2021-12-21 18:01:20,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542289319] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:20,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36226248] [2021-12-21 18:01:20,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:20,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:20,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:20,319 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:01:20,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 18:01:20,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:20,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-21 18:01:20,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:20,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:01:20,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-21 18:01:20,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 18:01:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:20,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:20,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36226248] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:20,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:20,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-21 18:01:20,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502879310] [2021-12-21 18:01:20,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:20,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 18:01:20,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:20,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 18:01:20,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:01:20,761 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:20,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:20,873 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2021-12-21 18:01:20,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:01:20,873 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 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) Word has length 11 [2021-12-21 18:01:20,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:20,874 INFO L225 Difference]: With dead ends: 116 [2021-12-21 18:01:20,874 INFO L226 Difference]: Without dead ends: 116 [2021-12-21 18:01:20,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-21 18:01:20,875 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 144 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:20,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 191 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:01:20,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-21 18:01:20,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 48. [2021-12-21 18:01:20,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:20,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-12-21 18:01:20,885 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 11 [2021-12-21 18:01:20,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:20,886 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-12-21 18:01:20,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:20,886 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-12-21 18:01:20,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 18:01:20,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:20,887 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:20,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:21,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 18:01:21,104 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:21,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:21,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446205, now seen corresponding path program 1 times [2021-12-21 18:01:21,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:21,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225100298] [2021-12-21 18:01:21,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:21,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:21,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:21,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225100298] [2021-12-21 18:01:21,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225100298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:21,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:21,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:01:21,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505509489] [2021-12-21 18:01:21,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:21,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:01:21,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:21,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:01:21,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:01:21,166 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:21,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:21,200 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-12-21 18:01:21,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:01:21,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 18:01:21,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:21,201 INFO L225 Difference]: With dead ends: 47 [2021-12-21 18:01:21,201 INFO L226 Difference]: Without dead ends: 47 [2021-12-21 18:01:21,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:01:21,202 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:21,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 67 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:21,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-21 18:01:21,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-21 18:01:21,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 46 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) [2021-12-21 18:01:21,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-21 18:01:21,205 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 13 [2021-12-21 18:01:21,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:21,205 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-21 18:01:21,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:21,205 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-21 18:01:21,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 18:01:21,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:21,206 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:21,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 18:01:21,206 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:21,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:21,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446204, now seen corresponding path program 1 times [2021-12-21 18:01:21,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:21,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883066905] [2021-12-21 18:01:21,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:21,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:21,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:21,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:21,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883066905] [2021-12-21 18:01:21,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883066905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:21,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:21,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 18:01:21,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547875983] [2021-12-21 18:01:21,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:21,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 18:01:21,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:21,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 18:01:21,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:01:21,288 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:21,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:21,339 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-12-21 18:01:21,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:01:21,340 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 18:01:21,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:21,341 INFO L225 Difference]: With dead ends: 50 [2021-12-21 18:01:21,341 INFO L226 Difference]: Without dead ends: 50 [2021-12-21 18:01:21,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:01:21,342 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 97 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:21,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 78 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:21,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-21 18:01:21,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-12-21 18:01:21,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:21,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-12-21 18:01:21,345 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 13 [2021-12-21 18:01:21,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:21,345 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-12-21 18:01:21,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:21,345 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-12-21 18:01:21,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 18:01:21,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:21,346 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:21,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 18:01:21,346 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:21,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:21,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-12-21 18:01:21,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:21,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396538191] [2021-12-21 18:01:21,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:21,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:21,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:21,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396538191] [2021-12-21 18:01:21,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396538191] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:21,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881269563] [2021-12-21 18:01:21,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:21,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:21,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:21,407 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:01:21,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 18:01:21,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:21,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 18:01:21,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:21,527 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:01:21,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-21 18:01:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:21,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:21,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881269563] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:21,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:21,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-21 18:01:21,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363582910] [2021-12-21 18:01:21,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:21,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 18:01:21,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:21,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 18:01:21,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-21 18:01:21,801 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:21,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:21,897 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2021-12-21 18:01:21,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 18:01:21,898 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 18:01:21,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:21,898 INFO L225 Difference]: With dead ends: 91 [2021-12-21 18:01:21,898 INFO L226 Difference]: Without dead ends: 91 [2021-12-21 18:01:21,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-12-21 18:01:21,899 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 139 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:21,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 173 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:01:21,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-21 18:01:21,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 46. [2021-12-21 18:01:21,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:21,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-12-21 18:01:21,901 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 13 [2021-12-21 18:01:21,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:21,902 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-12-21 18:01:21,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:21,902 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-12-21 18:01:21,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 18:01:21,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:21,903 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:21,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:22,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-21 18:01:22,120 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:22,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:22,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1435298785, now seen corresponding path program 1 times [2021-12-21 18:01:22,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:22,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645403927] [2021-12-21 18:01:22,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:22,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:22,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:22,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645403927] [2021-12-21 18:01:22,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645403927] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:22,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:22,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:01:22,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891576272] [2021-12-21 18:01:22,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:22,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:01:22,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:22,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:01:22,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:01:22,174 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:22,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:22,217 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-12-21 18:01:22,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:01:22,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-21 18:01:22,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:22,219 INFO L225 Difference]: With dead ends: 46 [2021-12-21 18:01:22,219 INFO L226 Difference]: Without dead ends: 46 [2021-12-21 18:01:22,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 18:01:22,220 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:22,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 76 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:22,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-21 18:01:22,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-12-21 18:01:22,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:22,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-12-21 18:01:22,222 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 16 [2021-12-21 18:01:22,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:22,223 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-12-21 18:01:22,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:22,223 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-12-21 18:01:22,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 18:01:22,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:22,225 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:22,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 18:01:22,226 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:22,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:22,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1435298784, now seen corresponding path program 1 times [2021-12-21 18:01:22,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:22,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265758551] [2021-12-21 18:01:22,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:22,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:22,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:22,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265758551] [2021-12-21 18:01:22,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265758551] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:22,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:22,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 18:01:22,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009946253] [2021-12-21 18:01:22,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:22,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:01:22,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:22,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:01:22,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:01:22,310 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:22,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:22,372 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-12-21 18:01:22,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:01:22,372 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-21 18:01:22,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:22,373 INFO L225 Difference]: With dead ends: 49 [2021-12-21 18:01:22,373 INFO L226 Difference]: Without dead ends: 49 [2021-12-21 18:01:22,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-21 18:01:22,373 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 57 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:22,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 88 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:22,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-21 18:01:22,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-12-21 18:01:22,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:22,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-12-21 18:01:22,375 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 16 [2021-12-21 18:01:22,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:22,375 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-12-21 18:01:22,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:22,375 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-12-21 18:01:22,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-21 18:01:22,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:22,376 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:22,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 18:01:22,376 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:22,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:22,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1033258167, now seen corresponding path program 1 times [2021-12-21 18:01:22,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:22,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411074135] [2021-12-21 18:01:22,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:22,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:22,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:22,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411074135] [2021-12-21 18:01:22,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411074135] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:22,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:22,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:01:22,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739048702] [2021-12-21 18:01:22,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:22,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:01:22,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:22,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:01:22,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:22,476 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:22,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:22,487 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-12-21 18:01:22,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:01:22,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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 21 [2021-12-21 18:01:22,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:22,488 INFO L225 Difference]: With dead ends: 46 [2021-12-21 18:01:22,488 INFO L226 Difference]: Without dead ends: 43 [2021-12-21 18:01:22,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:22,488 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:22,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 52 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:22,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-21 18:01:22,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-21 18:01:22,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:22,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-12-21 18:01:22,490 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 21 [2021-12-21 18:01:22,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:22,490 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-12-21 18:01:22,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:22,491 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-12-21 18:01:22,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-21 18:01:22,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:22,491 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:22,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 18:01:22,491 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:22,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:22,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1033312273, now seen corresponding path program 1 times [2021-12-21 18:01:22,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:22,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558392287] [2021-12-21 18:01:22,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:22,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:22,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:22,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:22,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558392287] [2021-12-21 18:01:22,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558392287] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:22,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:22,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 18:01:22,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402056070] [2021-12-21 18:01:22,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:22,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 18:01:22,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:22,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 18:01:22,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:01:22,579 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:22,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:22,706 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-12-21 18:01:22,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 18:01:22,706 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 21 [2021-12-21 18:01:22,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:22,706 INFO L225 Difference]: With dead ends: 53 [2021-12-21 18:01:22,707 INFO L226 Difference]: Without dead ends: 34 [2021-12-21 18:01:22,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-12-21 18:01:22,707 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 39 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:22,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 173 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:22,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-21 18:01:22,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-21 18:01:22,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:22,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-12-21 18:01:22,708 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 21 [2021-12-21 18:01:22,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:22,708 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-12-21 18:01:22,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:22,708 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-12-21 18:01:22,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-21 18:01:22,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:22,709 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:22,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 18:01:22,709 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:22,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:22,709 INFO L85 PathProgramCache]: Analyzing trace with hash -960832433, now seen corresponding path program 1 times [2021-12-21 18:01:22,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:22,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867287801] [2021-12-21 18:01:22,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:22,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:22,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:22,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867287801] [2021-12-21 18:01:22,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867287801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:22,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:22,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-21 18:01:22,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673952767] [2021-12-21 18:01:22,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:22,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 18:01:22,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:22,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 18:01:22,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-21 18:01:22,828 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:22,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:22,930 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-12-21 18:01:22,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 18:01:22,930 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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 21 [2021-12-21 18:01:22,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:22,931 INFO L225 Difference]: With dead ends: 48 [2021-12-21 18:01:22,931 INFO L226 Difference]: Without dead ends: 38 [2021-12-21 18:01:22,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-12-21 18:01:22,932 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 81 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:22,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 150 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:22,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-21 18:01:22,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-12-21 18:01:22,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 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) [2021-12-21 18:01:22,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-12-21 18:01:22,933 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 21 [2021-12-21 18:01:22,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:22,933 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-12-21 18:01:22,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:22,933 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-12-21 18:01:22,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-21 18:01:22,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:22,933 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:22,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 18:01:22,934 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:22,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:22,934 INFO L85 PathProgramCache]: Analyzing trace with hash -276078, now seen corresponding path program 1 times [2021-12-21 18:01:22,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:22,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326263255] [2021-12-21 18:01:22,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:22,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:23,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:23,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:23,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326263255] [2021-12-21 18:01:23,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326263255] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:23,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896885702] [2021-12-21 18:01:23,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:23,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:23,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:23,065 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:01:23,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 18:01:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:23,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-21 18:01:23,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:23,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:23,404 INFO L387 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 5 treesize of output 3 [2021-12-21 18:01:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:23,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896885702] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:23,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:23,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2021-12-21 18:01:23,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165807266] [2021-12-21 18:01:23,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:23,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-21 18:01:23,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:23,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-21 18:01:23,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-12-21 18:01:23,445 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:23,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:23,755 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-12-21 18:01:23,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 18:01:23,756 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 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 [2021-12-21 18:01:23,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:23,757 INFO L225 Difference]: With dead ends: 49 [2021-12-21 18:01:23,757 INFO L226 Difference]: Without dead ends: 49 [2021-12-21 18:01:23,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2021-12-21 18:01:23,757 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 180 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:23,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 212 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:01:23,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-21 18:01:23,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-12-21 18:01:23,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:23,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-12-21 18:01:23,759 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 25 [2021-12-21 18:01:23,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:23,759 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-12-21 18:01:23,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:23,759 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-12-21 18:01:23,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-21 18:01:23,759 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:23,760 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:23,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:23,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:23,964 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:23,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:23,964 INFO L85 PathProgramCache]: Analyzing trace with hash -278256, now seen corresponding path program 1 times [2021-12-21 18:01:23,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:23,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563974468] [2021-12-21 18:01:23,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:23,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:23,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:24,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:24,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563974468] [2021-12-21 18:01:24,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563974468] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:24,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359541159] [2021-12-21 18:01:24,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:24,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:24,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:24,297 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:01:24,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 18:01:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:24,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-21 18:01:24,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:24,490 INFO L387 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 14 treesize of output 10 [2021-12-21 18:01:24,543 INFO L353 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-12-21 18:01:24,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-21 18:01:24,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:01:24,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:01:24,644 INFO L387 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 17 treesize of output 10 [2021-12-21 18:01:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:24,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:01:24,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359541159] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:24,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:01:24,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 23 [2021-12-21 18:01:24,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429862394] [2021-12-21 18:01:24,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:24,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 18:01:24,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:24,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 18:01:24,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-12-21 18:01:24,708 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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) [2021-12-21 18:01:24,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:24,738 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-12-21 18:01:24,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 18:01:24,738 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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) Word has length 25 [2021-12-21 18:01:24,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:24,739 INFO L225 Difference]: With dead ends: 65 [2021-12-21 18:01:24,739 INFO L226 Difference]: Without dead ends: 65 [2021-12-21 18:01:24,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-12-21 18:01:24,739 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:24,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 166 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 40 Unchecked, 0.0s Time] [2021-12-21 18:01:24,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-21 18:01:24,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-12-21 18:01:24,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2021-12-21 18:01:24,741 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 25 [2021-12-21 18:01:24,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:24,741 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2021-12-21 18:01:24,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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) [2021-12-21 18:01:24,741 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2021-12-21 18:01:24,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-21 18:01:24,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:24,742 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:24,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:24,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:24,942 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:24,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:24,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1805716590, now seen corresponding path program 1 times [2021-12-21 18:01:24,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:24,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934065286] [2021-12-21 18:01:24,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:24,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:25,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:25,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934065286] [2021-12-21 18:01:25,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934065286] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:25,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:25,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 18:01:25,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029469660] [2021-12-21 18:01:25,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:25,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 18:01:25,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:25,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 18:01:25,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 18:01:25,074 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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) [2021-12-21 18:01:25,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:25,203 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2021-12-21 18:01:25,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 18:01:25,204 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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) Word has length 25 [2021-12-21 18:01:25,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:25,204 INFO L225 Difference]: With dead ends: 93 [2021-12-21 18:01:25,204 INFO L226 Difference]: Without dead ends: 93 [2021-12-21 18:01:25,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-12-21 18:01:25,205 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 73 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:25,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 153 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:01:25,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-21 18:01:25,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 65. [2021-12-21 18:01:25,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:25,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-12-21 18:01:25,206 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 25 [2021-12-21 18:01:25,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:25,207 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-12-21 18:01:25,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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) [2021-12-21 18:01:25,207 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-12-21 18:01:25,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 18:01:25,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:25,207 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:25,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 18:01:25,207 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:25,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:25,208 INFO L85 PathProgramCache]: Analyzing trace with hash -2113727723, now seen corresponding path program 1 times [2021-12-21 18:01:25,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:25,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113872985] [2021-12-21 18:01:25,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:25,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:25,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:25,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113872985] [2021-12-21 18:01:25,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113872985] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:25,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170415195] [2021-12-21 18:01:25,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:25,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:25,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:25,323 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:01:25,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 18:01:25,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:25,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-21 18:01:25,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:25,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:25,651 INFO L387 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 5 treesize of output 3 [2021-12-21 18:01:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:25,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170415195] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:25,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:25,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2021-12-21 18:01:25,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562438055] [2021-12-21 18:01:25,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:25,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 18:01:25,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:25,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 18:01:25,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-12-21 18:01:25,691 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:25,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:25,916 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2021-12-21 18:01:25,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 18:01:25,918 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-21 18:01:25,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:25,919 INFO L225 Difference]: With dead ends: 86 [2021-12-21 18:01:25,919 INFO L226 Difference]: Without dead ends: 86 [2021-12-21 18:01:25,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2021-12-21 18:01:25,919 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 192 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:25,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 281 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:01:25,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-21 18:01:25,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2021-12-21 18:01:25,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 79 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) [2021-12-21 18:01:25,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-12-21 18:01:25,921 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 29 [2021-12-21 18:01:25,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:25,921 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-12-21 18:01:25,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:25,921 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-12-21 18:01:25,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 18:01:25,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:25,922 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:25,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:26,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-21 18:01:26,122 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:26,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:26,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1128269345, now seen corresponding path program 2 times [2021-12-21 18:01:26,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:26,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779772045] [2021-12-21 18:01:26,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:26,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:26,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:26,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779772045] [2021-12-21 18:01:26,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779772045] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:26,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987197000] [2021-12-21 18:01:26,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:01:26,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:26,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:26,274 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:01:26,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 18:01:26,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:01:26,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:26,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-21 18:01:26,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:26,378 INFO L387 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 14 treesize of output 10 [2021-12-21 18:01:26,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:01:26,742 INFO L387 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 20 treesize of output 20 [2021-12-21 18:01:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:26,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:27,314 INFO L387 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 [2021-12-21 18:01:27,317 INFO L387 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 26 treesize of output 22 [2021-12-21 18:01:27,321 INFO L387 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 35 treesize of output 27 [2021-12-21 18:01:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:27,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987197000] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:27,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:27,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 37 [2021-12-21 18:01:27,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424639763] [2021-12-21 18:01:27,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:27,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-21 18:01:27,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:27,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-21 18:01:27,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 18:01:27,354 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:27,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:27,790 INFO L93 Difference]: Finished difference Result 134 states and 147 transitions. [2021-12-21 18:01:27,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-21 18:01:27,790 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 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 30 [2021-12-21 18:01:27,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:27,792 INFO L225 Difference]: With dead ends: 134 [2021-12-21 18:01:27,792 INFO L226 Difference]: Without dead ends: 115 [2021-12-21 18:01:27,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=262, Invalid=2494, Unknown=0, NotChecked=0, Total=2756 [2021-12-21 18:01:27,793 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 96 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:27,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 373 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 152 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2021-12-21 18:01:27,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-21 18:01:27,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 109. [2021-12-21 18:01:27,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.1401869158878504) internal successors, (122), 108 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:27,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2021-12-21 18:01:27,796 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 30 [2021-12-21 18:01:27,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:27,796 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2021-12-21 18:01:27,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:27,796 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2021-12-21 18:01:27,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-21 18:01:27,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:27,797 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:27,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:27,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:27,998 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:27,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:27,998 INFO L85 PathProgramCache]: Analyzing trace with hash -988436448, now seen corresponding path program 2 times [2021-12-21 18:01:27,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:27,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180290727] [2021-12-21 18:01:27,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:27,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:28,204 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:28,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:28,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180290727] [2021-12-21 18:01:28,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180290727] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:28,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170367631] [2021-12-21 18:01:28,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:01:28,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:28,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:28,206 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:01:28,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 18:01:28,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:01:28,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:28,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-21 18:01:28,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:28,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 18:01:28,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 18:01:28,425 INFO L387 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 17 treesize of output 19 [2021-12-21 18:01:28,628 INFO L353 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-21 18:01:28,628 INFO L387 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 18 treesize of output 10 [2021-12-21 18:01:28,662 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:28,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:28,780 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_286 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_286) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) is different from false [2021-12-21 18:01:28,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:01:28,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-21 18:01:28,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:01:28,791 INFO L387 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 37 treesize of output 37 [2021-12-21 18:01:28,794 INFO L387 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 11 treesize of output 7 [2021-12-21 18:01:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:28,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170367631] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:28,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:28,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15] total 32 [2021-12-21 18:01:28,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452657594] [2021-12-21 18:01:28,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:28,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-21 18:01:28,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:28,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-21 18:01:28,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=826, Unknown=1, NotChecked=58, Total=992 [2021-12-21 18:01:28,990 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:29,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:29,470 INFO L93 Difference]: Finished difference Result 178 states and 196 transitions. [2021-12-21 18:01:29,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 18:01:29,471 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-21 18:01:29,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:29,472 INFO L225 Difference]: With dead ends: 178 [2021-12-21 18:01:29,472 INFO L226 Difference]: Without dead ends: 178 [2021-12-21 18:01:29,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 4 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=330, Invalid=1653, Unknown=1, NotChecked=86, Total=2070 [2021-12-21 18:01:29,473 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 209 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:29,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 455 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 255 Invalid, 0 Unknown, 129 Unchecked, 0.1s Time] [2021-12-21 18:01:29,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-21 18:01:29,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 160. [2021-12-21 18:01:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 158 states have (on average 1.139240506329114) internal successors, (180), 159 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:29,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 180 transitions. [2021-12-21 18:01:29,475 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 180 transitions. Word has length 37 [2021-12-21 18:01:29,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:29,475 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 180 transitions. [2021-12-21 18:01:29,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:29,476 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 180 transitions. [2021-12-21 18:01:29,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-21 18:01:29,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:29,476 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:29,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:29,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:29,687 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:29,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:29,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1971973557, now seen corresponding path program 3 times [2021-12-21 18:01:29,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:29,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325851915] [2021-12-21 18:01:29,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:29,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:29,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:29,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325851915] [2021-12-21 18:01:29,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325851915] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:29,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64102846] [2021-12-21 18:01:29,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 18:01:29,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:29,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:29,872 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:01:29,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 18:01:29,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-21 18:01:29,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:29,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-21 18:01:29,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:30,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 18:01:30,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 18:01:30,286 INFO L387 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 22 treesize of output 21 [2021-12-21 18:01:30,776 INFO L353 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-21 18:01:30,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-12-21 18:01:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:30,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:31,234 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0) (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| 2)) 0)) is different from false [2021-12-21 18:01:31,239 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:01:31,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-12-21 18:01:31,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:01:31,245 INFO L387 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 27 treesize of output 31 [2021-12-21 18:01:31,255 INFO L387 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 26 treesize of output 22 [2021-12-21 18:01:31,268 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:01:31,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 48 [2021-12-21 18:01:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:31,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64102846] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:31,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:31,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 16] total 42 [2021-12-21 18:01:31,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147117541] [2021-12-21 18:01:31,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:31,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-21 18:01:31,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:31,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-21 18:01:31,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1507, Unknown=1, NotChecked=78, Total=1722 [2021-12-21 18:01:31,470 INFO L87 Difference]: Start difference. First operand 160 states and 180 transitions. Second operand has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 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) [2021-12-21 18:01:32,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:32,188 INFO L93 Difference]: Finished difference Result 325 states and 354 transitions. [2021-12-21 18:01:32,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-21 18:01:32,189 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 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) Word has length 39 [2021-12-21 18:01:32,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:32,189 INFO L225 Difference]: With dead ends: 325 [2021-12-21 18:01:32,189 INFO L226 Difference]: Without dead ends: 279 [2021-12-21 18:01:32,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=346, Invalid=3439, Unknown=1, NotChecked=120, Total=3906 [2021-12-21 18:01:32,191 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 136 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:32,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 731 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 498 Invalid, 0 Unknown, 317 Unchecked, 0.2s Time] [2021-12-21 18:01:32,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-21 18:01:32,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 194. [2021-12-21 18:01:32,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 192 states have (on average 1.1354166666666667) internal successors, (218), 193 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:32,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 218 transitions. [2021-12-21 18:01:32,194 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 218 transitions. Word has length 39 [2021-12-21 18:01:32,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:32,195 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 218 transitions. [2021-12-21 18:01:32,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 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) [2021-12-21 18:01:32,195 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 218 transitions. [2021-12-21 18:01:32,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-21 18:01:32,195 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:32,195 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:32,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:32,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-21 18:01:32,396 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:32,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:32,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1200593699, now seen corresponding path program 3 times [2021-12-21 18:01:32,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:32,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151550438] [2021-12-21 18:01:32,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:32,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:32,499 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:32,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:32,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151550438] [2021-12-21 18:01:32,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151550438] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:32,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983703216] [2021-12-21 18:01:32,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 18:01:32,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:32,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:32,500 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:01:32,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 18:01:32,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 18:01:32,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:32,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-21 18:01:32,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:32,611 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:01:32,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-21 18:01:32,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:01:33,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:01:33,538 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:01:33,539 INFO L387 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 19 treesize of output 15 [2021-12-21 18:01:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:33,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:34,187 INFO L387 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 37 treesize of output 31 [2021-12-21 18:01:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:34,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983703216] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:34,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:34,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 18, 18] total 44 [2021-12-21 18:01:34,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507257248] [2021-12-21 18:01:34,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:34,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-21 18:01:34,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:34,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-21 18:01:34,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1790, Unknown=0, NotChecked=0, Total=1980 [2021-12-21 18:01:34,962 INFO L87 Difference]: Start difference. First operand 194 states and 218 transitions. Second operand has 45 states, 44 states have (on average 2.6136363636363638) internal successors, (115), 45 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:36,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:36,772 INFO L93 Difference]: Finished difference Result 252 states and 279 transitions. [2021-12-21 18:01:36,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-21 18:01:36,773 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.6136363636363638) internal successors, (115), 45 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-21 18:01:36,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:36,775 INFO L225 Difference]: With dead ends: 252 [2021-12-21 18:01:36,775 INFO L226 Difference]: Without dead ends: 252 [2021-12-21 18:01:36,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=743, Invalid=5419, Unknown=0, NotChecked=0, Total=6162 [2021-12-21 18:01:36,777 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 284 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:36,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 871 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 835 Invalid, 0 Unknown, 215 Unchecked, 0.4s Time] [2021-12-21 18:01:36,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-12-21 18:01:36,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 209. [2021-12-21 18:01:36,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 207 states have (on average 1.1400966183574879) internal successors, (236), 208 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:36,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 236 transitions. [2021-12-21 18:01:36,784 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 236 transitions. Word has length 41 [2021-12-21 18:01:36,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:36,784 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 236 transitions. [2021-12-21 18:01:36,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.6136363636363638) internal successors, (115), 45 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:36,785 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 236 transitions. [2021-12-21 18:01:36,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-21 18:01:36,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:36,785 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:36,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:37,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-21 18:01:37,004 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:37,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:37,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1978925873, now seen corresponding path program 1 times [2021-12-21 18:01:37,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:37,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976944572] [2021-12-21 18:01:37,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:37,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 18:01:37,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:37,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976944572] [2021-12-21 18:01:37,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976944572] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:37,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381823478] [2021-12-21 18:01:37,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:37,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:37,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:37,158 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:01:37,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 18:01:37,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:37,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-21 18:01:37,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:37,301 INFO L387 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 14 treesize of output 10 [2021-12-21 18:01:37,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:01:37,475 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 18:01:37,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:37,565 INFO L387 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 [2021-12-21 18:01:37,567 INFO L387 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 26 treesize of output 22 [2021-12-21 18:01:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 18:01:37,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381823478] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:37,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:37,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 27 [2021-12-21 18:01:37,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082036790] [2021-12-21 18:01:37,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:37,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-21 18:01:37,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:37,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-21 18:01:37,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-12-21 18:01:37,686 INFO L87 Difference]: Start difference. First operand 209 states and 236 transitions. Second operand has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 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) [2021-12-21 18:01:37,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:37,996 INFO L93 Difference]: Finished difference Result 258 states and 284 transitions. [2021-12-21 18:01:37,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 18:01:37,997 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 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) Word has length 42 [2021-12-21 18:01:37,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:37,998 INFO L225 Difference]: With dead ends: 258 [2021-12-21 18:01:37,998 INFO L226 Difference]: Without dead ends: 227 [2021-12-21 18:01:37,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=297, Invalid=1263, Unknown=0, NotChecked=0, Total=1560 [2021-12-21 18:01:37,998 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 106 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:37,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 299 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 153 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2021-12-21 18:01:37,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-21 18:01:38,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2021-12-21 18:01:38,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 224 states have (on average 1.1294642857142858) internal successors, (253), 225 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:38,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 253 transitions. [2021-12-21 18:01:38,002 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 253 transitions. Word has length 42 [2021-12-21 18:01:38,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:38,003 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 253 transitions. [2021-12-21 18:01:38,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 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) [2021-12-21 18:01:38,003 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 253 transitions. [2021-12-21 18:01:38,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-21 18:01:38,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:38,003 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:38,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-21 18:01:38,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-21 18:01:38,220 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:38,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:38,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1860251704, now seen corresponding path program 4 times [2021-12-21 18:01:38,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:38,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209843838] [2021-12-21 18:01:38,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:38,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:38,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:38,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209843838] [2021-12-21 18:01:38,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209843838] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:38,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769277210] [2021-12-21 18:01:38,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 18:01:38,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:38,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:38,369 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:01:38,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 18:01:38,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 18:01:38,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:38,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-21 18:01:38,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:38,452 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:01:38,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-21 18:01:38,609 INFO L387 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 [2021-12-21 18:01:38,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:01:38,868 INFO L387 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 21 treesize of output 21 [2021-12-21 18:01:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:39,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:39,497 INFO L387 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 [2021-12-21 18:01:39,503 INFO L387 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 26 treesize of output 22 [2021-12-21 18:01:40,013 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:40,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769277210] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:40,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:40,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 45 [2021-12-21 18:01:40,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216290591] [2021-12-21 18:01:40,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:40,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-21 18:01:40,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:40,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-21 18:01:40,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1869, Unknown=0, NotChecked=0, Total=2070 [2021-12-21 18:01:40,015 INFO L87 Difference]: Start difference. First operand 226 states and 253 transitions. Second operand has 46 states, 45 states have (on average 2.688888888888889) internal successors, (121), 46 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:42,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:42,084 INFO L93 Difference]: Finished difference Result 471 states and 519 transitions. [2021-12-21 18:01:42,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-21 18:01:42,084 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.688888888888889) internal successors, (121), 46 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-21 18:01:42,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:42,085 INFO L225 Difference]: With dead ends: 471 [2021-12-21 18:01:42,085 INFO L226 Difference]: Without dead ends: 471 [2021-12-21 18:01:42,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1301, Invalid=5341, Unknown=0, NotChecked=0, Total=6642 [2021-12-21 18:01:42,087 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 842 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:42,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 611 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 834 Invalid, 0 Unknown, 77 Unchecked, 0.4s Time] [2021-12-21 18:01:42,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-12-21 18:01:42,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 283. [2021-12-21 18:01:42,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 281 states have (on average 1.1387900355871887) internal successors, (320), 282 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:42,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 320 transitions. [2021-12-21 18:01:42,093 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 320 transitions. Word has length 43 [2021-12-21 18:01:42,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:42,093 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 320 transitions. [2021-12-21 18:01:42,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.688888888888889) internal successors, (121), 46 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:42,094 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 320 transitions. [2021-12-21 18:01:42,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-21 18:01:42,094 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:42,094 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:42,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:42,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-21 18:01:42,301 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:42,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:42,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1252507090, now seen corresponding path program 4 times [2021-12-21 18:01:42,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:42,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957442208] [2021-12-21 18:01:42,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:42,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:42,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:42,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:42,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957442208] [2021-12-21 18:01:42,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957442208] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:42,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441136327] [2021-12-21 18:01:42,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 18:01:42,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:42,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:42,884 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:01:42,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 18:01:42,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 18:01:42,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:42,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-21 18:01:42,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:42,982 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:01:42,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-21 18:01:42,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 18:01:43,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 18:01:43,272 INFO L387 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 16 treesize of output 18 [2021-12-21 18:01:43,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:01:43,649 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-21 18:01:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:43,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:44,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:01:44,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-21 18:01:44,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:01:44,204 INFO L387 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 33 treesize of output 33 [2021-12-21 18:01:44,208 INFO L387 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 9 treesize of output 7 [2021-12-21 18:01:44,696 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:44,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441136327] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:44,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:44,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 16] total 53 [2021-12-21 18:01:44,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032160148] [2021-12-21 18:01:44,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:44,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-21 18:01:44,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:44,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-21 18:01:44,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2564, Unknown=28, NotChecked=0, Total=2756 [2021-12-21 18:01:44,699 INFO L87 Difference]: Start difference. First operand 283 states and 320 transitions. Second operand has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:46,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:46,378 INFO L93 Difference]: Finished difference Result 472 states and 532 transitions. [2021-12-21 18:01:46,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-21 18:01:46,379 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 0 states have call successors, (0), 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 49 [2021-12-21 18:01:46,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:46,380 INFO L225 Difference]: With dead ends: 472 [2021-12-21 18:01:46,380 INFO L226 Difference]: Without dead ends: 445 [2021-12-21 18:01:46,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=621, Invalid=7361, Unknown=28, NotChecked=0, Total=8010 [2021-12-21 18:01:46,382 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 182 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:46,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 956 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 661 Invalid, 0 Unknown, 313 Unchecked, 0.3s Time] [2021-12-21 18:01:46,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-12-21 18:01:46,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 412. [2021-12-21 18:01:46,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 410 states have (on average 1.148780487804878) internal successors, (471), 411 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:46,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 471 transitions. [2021-12-21 18:01:46,393 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 471 transitions. Word has length 49 [2021-12-21 18:01:46,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:46,393 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 471 transitions. [2021-12-21 18:01:46,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:46,393 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 471 transitions. [2021-12-21 18:01:46,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-21 18:01:46,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:46,394 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:46,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:46,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-21 18:01:46,603 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:46,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:46,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1185464536, now seen corresponding path program 5 times [2021-12-21 18:01:46,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:46,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096644047] [2021-12-21 18:01:46,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:46,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 49 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:46,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:46,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096644047] [2021-12-21 18:01:46,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096644047] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:46,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734787976] [2021-12-21 18:01:46,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 18:01:46,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:46,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:46,762 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:01:46,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 18:01:46,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-21 18:01:46,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:46,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-21 18:01:46,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:46,876 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:01:46,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-21 18:01:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:47,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:47,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734787976] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:47,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:47,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 40 [2021-12-21 18:01:47,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67648434] [2021-12-21 18:01:47,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:47,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-21 18:01:47,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:47,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-21 18:01:47,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-12-21 18:01:47,454 INFO L87 Difference]: Start difference. First operand 412 states and 471 transitions. Second operand has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:48,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:48,255 INFO L93 Difference]: Finished difference Result 889 states and 986 transitions. [2021-12-21 18:01:48,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-21 18:01:48,255 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 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 [2021-12-21 18:01:48,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:48,257 INFO L225 Difference]: With dead ends: 889 [2021-12-21 18:01:48,257 INFO L226 Difference]: Without dead ends: 757 [2021-12-21 18:01:48,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=936, Invalid=3096, Unknown=0, NotChecked=0, Total=4032 [2021-12-21 18:01:48,258 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 261 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:48,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 562 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 18:01:48,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-12-21 18:01:48,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 540. [2021-12-21 18:01:48,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 538 states have (on average 1.1449814126394051) internal successors, (616), 539 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:48,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 616 transitions. [2021-12-21 18:01:48,267 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 616 transitions. Word has length 53 [2021-12-21 18:01:48,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:48,267 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 616 transitions. [2021-12-21 18:01:48,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:48,267 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 616 transitions. [2021-12-21 18:01:48,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-21 18:01:48,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:48,268 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:48,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:48,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:48,479 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:48,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:48,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1963378865, now seen corresponding path program 5 times [2021-12-21 18:01:48,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:48,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361090352] [2021-12-21 18:01:48,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:48,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:48,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:48,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:48,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361090352] [2021-12-21 18:01:48,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361090352] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:48,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57758697] [2021-12-21 18:01:48,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 18:01:48,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:48,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:48,600 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:01:48,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 18:01:48,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-21 18:01:48,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:48,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-21 18:01:48,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:48,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:01:48,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-21 18:01:48,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 18:01:48,996 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:48,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:49,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57758697] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:49,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:49,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2021-12-21 18:01:49,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005860511] [2021-12-21 18:01:49,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:49,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-21 18:01:49,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:49,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-21 18:01:49,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-12-21 18:01:49,343 INFO L87 Difference]: Start difference. First operand 540 states and 616 transitions. Second operand has 29 states, 28 states have (on average 5.321428571428571) internal successors, (149), 29 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:49,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:49,975 INFO L93 Difference]: Finished difference Result 641 states and 720 transitions. [2021-12-21 18:01:49,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 18:01:49,976 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 5.321428571428571) internal successors, (149), 29 states have internal predecessors, (149), 0 states have call successors, (0), 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 [2021-12-21 18:01:49,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:49,977 INFO L225 Difference]: With dead ends: 641 [2021-12-21 18:01:49,977 INFO L226 Difference]: Without dead ends: 641 [2021-12-21 18:01:49,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=363, Invalid=1617, Unknown=0, NotChecked=0, Total=1980 [2021-12-21 18:01:49,978 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 348 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:49,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 843 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 18:01:49,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-12-21 18:01:49,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 601. [2021-12-21 18:01:49,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 599 states have (on average 1.1452420701168615) internal successors, (686), 600 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:49,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 686 transitions. [2021-12-21 18:01:49,986 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 686 transitions. Word has length 53 [2021-12-21 18:01:49,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:49,987 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 686 transitions. [2021-12-21 18:01:49,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 5.321428571428571) internal successors, (149), 29 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:49,987 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 686 transitions. [2021-12-21 18:01:49,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 18:01:49,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:49,988 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:50,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:50,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:50,205 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:50,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:50,205 INFO L85 PathProgramCache]: Analyzing trace with hash 678158875, now seen corresponding path program 6 times [2021-12-21 18:01:50,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:50,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954276297] [2021-12-21 18:01:50,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:50,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:50,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:50,426 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:50,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:50,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954276297] [2021-12-21 18:01:50,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954276297] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:50,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766887323] [2021-12-21 18:01:50,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 18:01:50,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:50,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:50,427 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:01:50,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-21 18:01:50,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-21 18:01:50,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:50,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-21 18:01:50,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:50,647 INFO L387 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 14 treesize of output 10 [2021-12-21 18:01:50,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:01:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:50,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:50,911 INFO L387 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 [2021-12-21 18:01:50,913 INFO L387 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 26 treesize of output 22 [2021-12-21 18:01:51,068 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:51,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766887323] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:51,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:51,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 36 [2021-12-21 18:01:51,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511257177] [2021-12-21 18:01:51,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:51,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-21 18:01:51,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:51,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-21 18:01:51,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2021-12-21 18:01:51,069 INFO L87 Difference]: Start difference. First operand 601 states and 686 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:51,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:51,812 INFO L93 Difference]: Finished difference Result 1102 states and 1231 transitions. [2021-12-21 18:01:51,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-21 18:01:51,813 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 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 57 [2021-12-21 18:01:51,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:51,815 INFO L225 Difference]: With dead ends: 1102 [2021-12-21 18:01:51,815 INFO L226 Difference]: Without dead ends: 1001 [2021-12-21 18:01:51,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=361, Invalid=2501, Unknown=0, NotChecked=0, Total=2862 [2021-12-21 18:01:51,816 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 371 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:51,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 1190 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 967 Invalid, 0 Unknown, 52 Unchecked, 0.4s Time] [2021-12-21 18:01:51,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2021-12-21 18:01:51,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 617. [2021-12-21 18:01:51,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 615 states have (on average 1.1447154471544716) internal successors, (704), 616 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:51,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 704 transitions. [2021-12-21 18:01:51,825 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 704 transitions. Word has length 57 [2021-12-21 18:01:51,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:51,825 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 704 transitions. [2021-12-21 18:01:51,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:51,825 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 704 transitions. [2021-12-21 18:01:51,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-21 18:01:51,826 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:51,826 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:51,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-21 18:01:52,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:52,044 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:52,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:52,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1017817884, now seen corresponding path program 1 times [2021-12-21 18:01:52,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:52,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047548986] [2021-12-21 18:01:52,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:52,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:52,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:52,226 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 18:01:52,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:52,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047548986] [2021-12-21 18:01:52,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047548986] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:52,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253841050] [2021-12-21 18:01:52,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:52,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:52,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:52,227 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:01:52,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-21 18:01:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:52,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-21 18:01:52,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:52,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 18:01:52,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 18:01:52,507 INFO L387 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 17 treesize of output 19 [2021-12-21 18:01:52,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:01:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 7 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 18:01:52,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:52,744 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_595 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_595) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2021-12-21 18:01:52,748 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:01:52,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-21 18:01:52,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:01:52,752 INFO L387 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 37 treesize of output 37 [2021-12-21 18:01:52,755 INFO L387 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 11 treesize of output 7 [2021-12-21 18:01:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 18:01:52,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253841050] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:52,954 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:52,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2021-12-21 18:01:52,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103638062] [2021-12-21 18:01:52,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:52,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-21 18:01:52,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:52,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-21 18:01:52,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=780, Unknown=1, NotChecked=56, Total=930 [2021-12-21 18:01:52,955 INFO L87 Difference]: Start difference. First operand 617 states and 704 transitions. Second operand has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:53,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:53,265 INFO L93 Difference]: Finished difference Result 625 states and 700 transitions. [2021-12-21 18:01:53,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 18:01:53,265 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-21 18:01:53,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:53,266 INFO L225 Difference]: With dead ends: 625 [2021-12-21 18:01:53,267 INFO L226 Difference]: Without dead ends: 544 [2021-12-21 18:01:53,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=1258, Unknown=1, NotChecked=72, Total=1482 [2021-12-21 18:01:53,267 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 81 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:53,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 801 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 480 Invalid, 0 Unknown, 151 Unchecked, 0.2s Time] [2021-12-21 18:01:53,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-12-21 18:01:53,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 475. [2021-12-21 18:01:53,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 473 states have (on average 1.1374207188160677) internal successors, (538), 474 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:53,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 538 transitions. [2021-12-21 18:01:53,275 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 538 transitions. Word has length 58 [2021-12-21 18:01:53,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:53,275 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 538 transitions. [2021-12-21 18:01:53,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:53,276 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 538 transitions. [2021-12-21 18:01:53,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 18:01:53,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:53,278 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:53,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:53,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-21 18:01:53,496 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:53,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:53,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1164356062, now seen corresponding path program 7 times [2021-12-21 18:01:53,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:53,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744029573] [2021-12-21 18:01:53,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:53,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:53,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:53,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744029573] [2021-12-21 18:01:53,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744029573] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:53,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133021565] [2021-12-21 18:01:53,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 18:01:53,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:53,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:53,705 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:01:53,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-21 18:01:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:53,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-21 18:01:53,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:54,052 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:54,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:54,344 INFO L387 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 5 treesize of output 3 [2021-12-21 18:01:54,396 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:54,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133021565] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:54,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:54,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 38 [2021-12-21 18:01:54,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344139120] [2021-12-21 18:01:54,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:54,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-21 18:01:54,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:54,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-21 18:01:54,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2021-12-21 18:01:54,398 INFO L87 Difference]: Start difference. First operand 475 states and 538 transitions. Second operand has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:55,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:55,161 INFO L93 Difference]: Finished difference Result 796 states and 885 transitions. [2021-12-21 18:01:55,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-21 18:01:55,162 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 states have internal predecessors, (125), 0 states have call successors, (0), 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 61 [2021-12-21 18:01:55,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:55,163 INFO L225 Difference]: With dead ends: 796 [2021-12-21 18:01:55,164 INFO L226 Difference]: Without dead ends: 796 [2021-12-21 18:01:55,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=627, Invalid=2679, Unknown=0, NotChecked=0, Total=3306 [2021-12-21 18:01:55,164 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 483 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:55,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 856 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 18:01:55,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-12-21 18:01:55,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 510. [2021-12-21 18:01:55,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 508 states have (on average 1.139763779527559) internal successors, (579), 509 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:55,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 579 transitions. [2021-12-21 18:01:55,171 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 579 transitions. Word has length 61 [2021-12-21 18:01:55,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:55,171 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 579 transitions. [2021-12-21 18:01:55,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:55,171 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 579 transitions. [2021-12-21 18:01:55,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 18:01:55,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:55,172 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:55,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:55,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:55,387 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:55,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:55,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1052245572, now seen corresponding path program 6 times [2021-12-21 18:01:55,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:55,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226577911] [2021-12-21 18:01:55,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:55,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:55,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:55,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:55,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226577911] [2021-12-21 18:01:55,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226577911] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:55,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953466442] [2021-12-21 18:01:55,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 18:01:55,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:55,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:55,709 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) [2021-12-21 18:01:55,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-21 18:01:55,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-21 18:01:55,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:55,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-21 18:01:55,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:55,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 18:01:56,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 18:01:56,080 INFO L387 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 17 treesize of output 19 [2021-12-21 18:01:56,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:01:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:56,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:56,412 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_672 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_672) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2021-12-21 18:01:56,417 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:01:56,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-21 18:01:56,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:01:56,421 INFO L387 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 37 treesize of output 37 [2021-12-21 18:01:56,423 INFO L387 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 11 treesize of output 7 [2021-12-21 18:01:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:56,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953466442] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:56,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:56,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18, 18] total 44 [2021-12-21 18:01:56,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918758241] [2021-12-21 18:01:56,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:56,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-21 18:01:56,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:56,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-21 18:01:56,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1686, Unknown=1, NotChecked=82, Total=1892 [2021-12-21 18:01:56,650 INFO L87 Difference]: Start difference. First operand 510 states and 579 transitions. Second operand has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:57,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:57,785 INFO L93 Difference]: Finished difference Result 938 states and 1044 transitions. [2021-12-21 18:01:57,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-21 18:01:57,786 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 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 61 [2021-12-21 18:01:57,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:57,788 INFO L225 Difference]: With dead ends: 938 [2021-12-21 18:01:57,788 INFO L226 Difference]: Without dead ends: 798 [2021-12-21 18:01:57,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=279, Invalid=4280, Unknown=1, NotChecked=132, Total=4692 [2021-12-21 18:01:57,789 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 193 mSDsluCounter, 2029 mSDsCounter, 0 mSdLazyCounter, 1970 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 2123 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:57,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 2123 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1970 Invalid, 0 Unknown, 143 Unchecked, 0.6s Time] [2021-12-21 18:01:57,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-12-21 18:01:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 574. [2021-12-21 18:01:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 572 states have (on average 1.1398601398601398) internal successors, (652), 573 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:57,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 652 transitions. [2021-12-21 18:01:57,798 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 652 transitions. Word has length 61 [2021-12-21 18:01:57,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:57,798 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 652 transitions. [2021-12-21 18:01:57,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:57,798 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 652 transitions. [2021-12-21 18:01:57,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 18:01:57,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:57,801 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:57,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:58,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:58,011 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:58,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:58,012 INFO L85 PathProgramCache]: Analyzing trace with hash 241818559, now seen corresponding path program 7 times [2021-12-21 18:01:58,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:58,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046193040] [2021-12-21 18:01:58,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:58,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:58,182 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:58,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:58,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046193040] [2021-12-21 18:01:58,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046193040] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:58,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105596030] [2021-12-21 18:01:58,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 18:01:58,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:58,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:58,184 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) [2021-12-21 18:01:58,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-21 18:01:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:58,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-21 18:01:58,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:58,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:58,841 INFO L387 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 5 treesize of output 3 [2021-12-21 18:01:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:01:58,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105596030] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:58,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:58,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2021-12-21 18:01:58,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792751897] [2021-12-21 18:01:58,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:58,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-21 18:01:58,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:58,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-21 18:01:58,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-12-21 18:01:58,890 INFO L87 Difference]: Start difference. First operand 574 states and 652 transitions. Second operand has 31 states, 30 states have (on average 4.366666666666666) internal successors, (131), 31 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:59,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:59,452 INFO L93 Difference]: Finished difference Result 861 states and 965 transitions. [2021-12-21 18:01:59,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-21 18:01:59,453 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.366666666666666) internal successors, (131), 31 states have internal predecessors, (131), 0 states have call successors, (0), 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 [2021-12-21 18:01:59,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:59,455 INFO L225 Difference]: With dead ends: 861 [2021-12-21 18:01:59,455 INFO L226 Difference]: Without dead ends: 861 [2021-12-21 18:01:59,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2021-12-21 18:01:59,455 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 372 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:59,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 947 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 18:01:59,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-12-21 18:01:59,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 640. [2021-12-21 18:01:59,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 638 states have (on average 1.141065830721003) internal successors, (728), 639 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:59,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 728 transitions. [2021-12-21 18:01:59,468 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 728 transitions. Word has length 65 [2021-12-21 18:01:59,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:59,469 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 728 transitions. [2021-12-21 18:01:59,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.366666666666666) internal successors, (131), 31 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:01:59,469 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 728 transitions. [2021-12-21 18:01:59,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 18:01:59,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:59,470 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:59,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-21 18:01:59,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:59,688 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:01:59,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:59,688 INFO L85 PathProgramCache]: Analyzing trace with hash 147941651, now seen corresponding path program 8 times [2021-12-21 18:01:59,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:59,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473370300] [2021-12-21 18:01:59,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:59,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:59,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:59,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473370300] [2021-12-21 18:01:59,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473370300] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:59,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520836110] [2021-12-21 18:01:59,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:01:59,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:59,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:59,950 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) [2021-12-21 18:01:59,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-21 18:02:00,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:02:00,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:00,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-21 18:02:00,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:00,171 INFO L387 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 14 treesize of output 10 [2021-12-21 18:02:01,074 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:02:01,074 INFO L387 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 20 treesize of output 20 [2021-12-21 18:02:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:01,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:01,967 INFO L387 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 [2021-12-21 18:02:01,970 INFO L387 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 16 treesize of output 12 [2021-12-21 18:02:01,973 INFO L387 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 26 treesize of output 22 [2021-12-21 18:02:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:02,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520836110] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:02,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:02:02,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 57 [2021-12-21 18:02:02,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844880769] [2021-12-21 18:02:02,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:02,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-21 18:02:02,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:02:02,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-21 18:02:02,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2973, Unknown=0, NotChecked=0, Total=3192 [2021-12-21 18:02:02,066 INFO L87 Difference]: Start difference. First operand 640 states and 728 transitions. Second operand has 57 states, 57 states have (on average 2.8947368421052633) internal successors, (165), 57 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:04,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:04,048 INFO L93 Difference]: Finished difference Result 1303 states and 1451 transitions. [2021-12-21 18:02:04,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-21 18:02:04,048 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.8947368421052633) internal successors, (165), 57 states have internal predecessors, (165), 0 states have call successors, (0), 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 66 [2021-12-21 18:02:04,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:04,051 INFO L225 Difference]: With dead ends: 1303 [2021-12-21 18:02:04,051 INFO L226 Difference]: Without dead ends: 1252 [2021-12-21 18:02:04,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1697 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=570, Invalid=7086, Unknown=0, NotChecked=0, Total=7656 [2021-12-21 18:02:04,052 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 439 mSDsluCounter, 1960 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 2055 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 605 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:04,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 2055 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1426 Invalid, 0 Unknown, 605 Unchecked, 0.5s Time] [2021-12-21 18:02:04,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2021-12-21 18:02:04,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 818. [2021-12-21 18:02:04,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 816 states have (on average 1.1397058823529411) internal successors, (930), 817 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:04,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 930 transitions. [2021-12-21 18:02:04,064 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 930 transitions. Word has length 66 [2021-12-21 18:02:04,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:04,064 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 930 transitions. [2021-12-21 18:02:04,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.8947368421052633) internal successors, (165), 57 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:04,065 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 930 transitions. [2021-12-21 18:02:04,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 18:02:04,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:04,066 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:04,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-21 18:02:04,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-21 18:02:04,279 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:02:04,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:04,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2007377610, now seen corresponding path program 8 times [2021-12-21 18:02:04,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:02:04,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697684687] [2021-12-21 18:02:04,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:02:04,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:02:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:02:04,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:02:04,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697684687] [2021-12-21 18:02:04,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697684687] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:02:04,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221120896] [2021-12-21 18:02:04,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:02:04,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:04,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:02:04,649 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) [2021-12-21 18:02:04,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-21 18:02:04,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:02:04,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:04,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 122 conjunts are in the unsatisfiable core [2021-12-21 18:02:04,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:04,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 18:02:05,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 18:02:05,201 INFO L387 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 17 treesize of output 19 [2021-12-21 18:02:07,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:02:07,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:02:07,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:02:07,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 17 [2021-12-21 18:02:07,391 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:02:07,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:07,997 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrspn_~p~0#1.offset_100| Int) (v_ArrVal_793 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_793) |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (.cse1 (select v_ArrVal_793 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (not (<= 1 |v_ULTIMATE.start_cstrspn_~p~0#1.offset_100|)) (not (= (select .cse0 (+ 3 |v_ULTIMATE.start_cstrspn_~p~0#1.offset_100|)) .cse1)) (< (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1) |v_ULTIMATE.start_cstrspn_~p~0#1.offset_100|) (not (= .cse1 (select .cse0 (+ (- 1) |v_ULTIMATE.start_cstrspn_~p~0#1.offset_100|)))) (= .cse1 0)))) is different from false [2021-12-21 18:02:08,006 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:02:08,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 42 [2021-12-21 18:02:08,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:02:08,018 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:02:08,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 83 [2021-12-21 18:02:08,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:02:08,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:02:08,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 60 [2021-12-21 18:02:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 17 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:02:08,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221120896] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:08,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:02:08,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 29] total 71 [2021-12-21 18:02:08,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794171202] [2021-12-21 18:02:08,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:08,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-21 18:02:08,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:02:08,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-21 18:02:08,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=4571, Unknown=1, NotChecked=136, Total=4970 [2021-12-21 18:02:08,947 INFO L87 Difference]: Start difference. First operand 818 states and 930 transitions. Second operand has 71 states, 71 states have (on average 2.563380281690141) internal successors, (182), 71 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:10,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:10,857 INFO L93 Difference]: Finished difference Result 1560 states and 1762 transitions. [2021-12-21 18:02:10,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-21 18:02:10,858 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.563380281690141) internal successors, (182), 71 states have internal predecessors, (182), 0 states have call successors, (0), 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 73 [2021-12-21 18:02:10,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:10,861 INFO L225 Difference]: With dead ends: 1560 [2021-12-21 18:02:10,861 INFO L226 Difference]: Without dead ends: 1517 [2021-12-21 18:02:10,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2084 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=524, Invalid=9985, Unknown=1, NotChecked=202, Total=10712 [2021-12-21 18:02:10,862 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 310 mSDsluCounter, 3539 mSDsCounter, 0 mSdLazyCounter, 1591 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 3651 SdHoareTripleChecker+Invalid, 3223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1613 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:10,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 3651 Invalid, 3223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1591 Invalid, 0 Unknown, 1613 Unchecked, 0.6s Time] [2021-12-21 18:02:10,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2021-12-21 18:02:10,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1282. [2021-12-21 18:02:10,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1280 states have (on average 1.1515625) internal successors, (1474), 1281 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:10,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1474 transitions. [2021-12-21 18:02:10,878 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1474 transitions. Word has length 73 [2021-12-21 18:02:10,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:10,878 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 1474 transitions. [2021-12-21 18:02:10,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.563380281690141) internal successors, (182), 71 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:10,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1474 transitions. [2021-12-21 18:02:10,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-21 18:02:10,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:10,880 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:10,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-21 18:02:11,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-21 18:02:11,093 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:02:11,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:11,094 INFO L85 PathProgramCache]: Analyzing trace with hash 15423873, now seen corresponding path program 9 times [2021-12-21 18:02:11,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:02:11,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041001640] [2021-12-21 18:02:11,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:02:11,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:02:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 20 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:02:11,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:02:11,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041001640] [2021-12-21 18:02:11,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041001640] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:02:11,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870926928] [2021-12-21 18:02:11,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 18:02:11,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:11,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:02:11,471 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) [2021-12-21 18:02:11,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-21 18:02:11,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-21 18:02:11,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:11,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-21 18:02:11,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:11,626 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:02:11,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-21 18:02:11,721 INFO L387 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 14 treesize of output 10 [2021-12-21 18:02:12,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:02:12,537 INFO L387 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 20 treesize of output 20 [2021-12-21 18:02:12,669 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-21 18:02:12,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:13,304 INFO L387 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 [2021-12-21 18:02:13,311 INFO L387 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 26 treesize of output 22 [2021-12-21 18:02:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-21 18:02:13,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870926928] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:13,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:02:13,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10, 10] total 43 [2021-12-21 18:02:13,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458849461] [2021-12-21 18:02:13,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:13,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-21 18:02:13,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:02:13,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-21 18:02:13,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1689, Unknown=0, NotChecked=0, Total=1806 [2021-12-21 18:02:13,454 INFO L87 Difference]: Start difference. First operand 1282 states and 1474 transitions. Second operand has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 43 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:15,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:15,247 INFO L93 Difference]: Finished difference Result 1693 states and 1921 transitions. [2021-12-21 18:02:15,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-21 18:02:15,247 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 43 states have internal predecessors, (127), 0 states have call successors, (0), 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 75 [2021-12-21 18:02:15,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:15,256 INFO L225 Difference]: With dead ends: 1693 [2021-12-21 18:02:15,256 INFO L226 Difference]: Without dead ends: 1558 [2021-12-21 18:02:15,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1960 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=593, Invalid=7963, Unknown=0, NotChecked=0, Total=8556 [2021-12-21 18:02:15,258 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 115 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:15,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 940 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 992 Invalid, 0 Unknown, 195 Unchecked, 0.4s Time] [2021-12-21 18:02:15,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2021-12-21 18:02:15,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1253. [2021-12-21 18:02:15,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1251 states have (on average 1.149480415667466) internal successors, (1438), 1252 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:15,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 1438 transitions. [2021-12-21 18:02:15,273 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 1438 transitions. Word has length 75 [2021-12-21 18:02:15,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:15,273 INFO L470 AbstractCegarLoop]: Abstraction has 1253 states and 1438 transitions. [2021-12-21 18:02:15,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 43 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:15,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 1438 transitions. [2021-12-21 18:02:15,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-21 18:02:15,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:15,275 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:15,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-21 18:02:15,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-21 18:02:15,500 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:02:15,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:15,501 INFO L85 PathProgramCache]: Analyzing trace with hash 2052723789, now seen corresponding path program 9 times [2021-12-21 18:02:15,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:02:15,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342647862] [2021-12-21 18:02:15,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:02:15,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:02:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 15 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:02:15,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:02:15,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342647862] [2021-12-21 18:02:15,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342647862] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:02:15,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25424605] [2021-12-21 18:02:15,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 18:02:15,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:15,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:02:15,668 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) [2021-12-21 18:02:15,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-21 18:02:15,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-21 18:02:15,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:15,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-21 18:02:15,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:15,808 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:02:15,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-21 18:02:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 28 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:02:16,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:02:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:02:16,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25424605] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:02:16,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:02:16,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2021-12-21 18:02:16,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172517374] [2021-12-21 18:02:16,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:02:16,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-21 18:02:16,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:02:16,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-21 18:02:16,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1419, Unknown=0, NotChecked=0, Total=1640 [2021-12-21 18:02:16,834 INFO L87 Difference]: Start difference. First operand 1253 states and 1438 transitions. Second operand has 41 states, 40 states have (on average 4.95) internal successors, (198), 41 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:17,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:02:17,684 INFO L93 Difference]: Finished difference Result 1717 states and 1961 transitions. [2021-12-21 18:02:17,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-21 18:02:17,684 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.95) internal successors, (198), 41 states have internal predecessors, (198), 0 states have call successors, (0), 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 77 [2021-12-21 18:02:17,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:02:17,687 INFO L225 Difference]: With dead ends: 1717 [2021-12-21 18:02:17,687 INFO L226 Difference]: Without dead ends: 1717 [2021-12-21 18:02:17,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=779, Invalid=3127, Unknown=0, NotChecked=0, Total=3906 [2021-12-21 18:02:17,688 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 413 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:02:17,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 831 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 18:02:17,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2021-12-21 18:02:17,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1349. [2021-12-21 18:02:17,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1347 states have (on average 1.1499628804751298) internal successors, (1549), 1348 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:17,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 1549 transitions. [2021-12-21 18:02:17,700 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 1549 transitions. Word has length 77 [2021-12-21 18:02:17,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:02:17,700 INFO L470 AbstractCegarLoop]: Abstraction has 1349 states and 1549 transitions. [2021-12-21 18:02:17,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.95) internal successors, (198), 41 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:02:17,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 1549 transitions. [2021-12-21 18:02:17,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-21 18:02:17,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:02:17,702 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:02:17,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-21 18:02:17,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:17,919 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 18:02:17,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:02:17,920 INFO L85 PathProgramCache]: Analyzing trace with hash 791104003, now seen corresponding path program 2 times [2021-12-21 18:02:17,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:02:17,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917469525] [2021-12-21 18:02:17,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:02:17,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:02:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:02:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 18:02:18,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:02:18,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917469525] [2021-12-21 18:02:18,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917469525] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:02:18,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029098641] [2021-12-21 18:02:18,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:02:18,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:02:18,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:02:18,138 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) [2021-12-21 18:02:18,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-21 18:02:18,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:02:18,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:02:18,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-21 18:02:18,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:02:18,274 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:02:18,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-21 18:02:18,529 INFO L387 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 14 treesize of output 10 [2021-12-21 18:02:19,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:02:19,622 INFO L387 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 20 treesize of output 20 [2021-12-21 18:02:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 28 proven. 136 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 18:02:19,808 INFO L328 TraceCheckSpWp]: Computing backward predicates...