./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/forester-heap/dll-reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/forester-heap/dll-reverse.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 52fc70d7844651686a4c27e057f507f0498e7d5f7c17f07a035699d1630f6ea2 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 21:27:19,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 21:27:19,585 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 21:27:19,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 21:27:19,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 21:27:19,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 21:27:19,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 21:27:19,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 21:27:19,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 21:27:19,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 21:27:19,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 21:27:19,632 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 21:27:19,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 21:27:19,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 21:27:19,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 21:27:19,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 21:27:19,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 21:27:19,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 21:27:19,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 21:27:19,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 21:27:19,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 21:27:19,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 21:27:19,649 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 21:27:19,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 21:27:19,653 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 21:27:19,656 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 21:27:19,656 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 21:27:19,657 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 21:27:19,658 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 21:27:19,658 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 21:27:19,659 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 21:27:19,659 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 21:27:19,660 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 21:27:19,661 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 21:27:19,662 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 21:27:19,662 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 21:27:19,663 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 21:27:19,663 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 21:27:19,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 21:27:19,664 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 21:27:19,664 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 21:27:19,665 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 21:27:19,689 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 21:27:19,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 21:27:19,690 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 21:27:19,690 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 21:27:19,690 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 21:27:19,691 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 21:27:19,691 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 21:27:19,691 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 21:27:19,691 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 21:27:19,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 21:27:19,692 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 21:27:19,692 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 21:27:19,692 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 21:27:19,693 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 21:27:19,693 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 21:27:19,693 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 21:27:19,693 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 21:27:19,693 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 21:27:19,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 21:27:19,693 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 21:27:19,694 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 21:27:19,694 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 21:27:19,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 21:27:19,694 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 21:27:19,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 21:27:19,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:27:19,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 21:27:19,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 21:27:19,695 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 21:27:19,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 21:27:19,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 21:27:19,695 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52fc70d7844651686a4c27e057f507f0498e7d5f7c17f07a035699d1630f6ea2 [2021-12-18 21:27:19,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 21:27:19,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 21:27:19,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 21:27:19,873 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 21:27:19,874 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 21:27:19,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/dll-reverse.i [2021-12-18 21:27:19,920 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bd634575/3628cf3fdbfe4905a2f0db07b5748abb/FLAG77cb3a6f6 [2021-12-18 21:27:20,318 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 21:27:20,319 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i [2021-12-18 21:27:20,333 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bd634575/3628cf3fdbfe4905a2f0db07b5748abb/FLAG77cb3a6f6 [2021-12-18 21:27:20,707 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bd634575/3628cf3fdbfe4905a2f0db07b5748abb [2021-12-18 21:27:20,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 21:27:20,710 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 21:27:20,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 21:27:20,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 21:27:20,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 21:27:20,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:27:20" (1/1) ... [2021-12-18 21:27:20,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c3c0163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:27:20, skipping insertion in model container [2021-12-18 21:27:20,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:27:20" (1/1) ... [2021-12-18 21:27:20,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 21:27:20,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 21:27:21,026 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i[22309,22322] [2021-12-18 21:27:21,030 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i[22394,22407] [2021-12-18 21:27:21,036 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i[22924,22937] [2021-12-18 21:27:21,039 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:27:21,045 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 21:27:21,069 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i[22309,22322] [2021-12-18 21:27:21,070 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i[22394,22407] [2021-12-18 21:27:21,080 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i[22924,22937] [2021-12-18 21:27:21,082 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:27:21,099 INFO L208 MainTranslator]: Completed translation [2021-12-18 21:27:21,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:27:21 WrapperNode [2021-12-18 21:27:21,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 21:27:21,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 21:27:21,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 21:27:21,104 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 21:27:21,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:27:21" (1/1) ... [2021-12-18 21:27:21,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:27:21" (1/1) ... [2021-12-18 21:27:21,132 INFO L137 Inliner]: procedures = 119, calls = 41, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 147 [2021-12-18 21:27:21,132 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 21:27:21,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 21:27:21,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 21:27:21,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 21:27:21,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:27:21" (1/1) ... [2021-12-18 21:27:21,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:27:21" (1/1) ... [2021-12-18 21:27:21,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:27:21" (1/1) ... [2021-12-18 21:27:21,142 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:27:21" (1/1) ... [2021-12-18 21:27:21,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:27:21" (1/1) ... [2021-12-18 21:27:21,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:27:21" (1/1) ... [2021-12-18 21:27:21,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:27:21" (1/1) ... [2021-12-18 21:27:21,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 21:27:21,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 21:27:21,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 21:27:21,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 21:27:21,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:27:21" (1/1) ... [2021-12-18 21:27:21,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:27:21,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:27:21,194 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) [2021-12-18 21:27:21,203 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 [2021-12-18 21:27:21,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 21:27:21,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 21:27:21,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 21:27:21,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 21:27:21,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 21:27:21,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 21:27:21,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 21:27:21,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 21:27:21,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 21:27:21,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 21:27:21,297 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 21:27:21,298 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 21:27:21,611 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 21:27:21,624 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 21:27:21,624 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-12-18 21:27:21,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:27:21 BoogieIcfgContainer [2021-12-18 21:27:21,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 21:27:21,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 21:27:21,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 21:27:21,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 21:27:21,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 09:27:20" (1/3) ... [2021-12-18 21:27:21,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de5f3b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:27:21, skipping insertion in model container [2021-12-18 21:27:21,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:27:21" (2/3) ... [2021-12-18 21:27:21,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de5f3b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:27:21, skipping insertion in model container [2021-12-18 21:27:21,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:27:21" (3/3) ... [2021-12-18 21:27:21,632 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-reverse.i [2021-12-18 21:27:21,638 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 21:27:21,639 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 69 error locations. [2021-12-18 21:27:21,675 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 21:27:21,679 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 [2021-12-18 21:27:21,679 INFO L340 AbstractCegarLoop]: Starting to check reachability of 69 error locations. [2021-12-18 21:27:21,691 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 79 states have (on average 2.1645569620253164) internal successors, (171), 148 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:21,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-18 21:27:21,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:27:21,698 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-18 21:27:21,698 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:27:21,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:27:21,702 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-18 21:27:21,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:27:21,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609122603] [2021-12-18 21:27:21,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:21,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:27:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:21,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:27:21,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609122603] [2021-12-18 21:27:21,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609122603] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:27:21,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:27:21,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 21:27:21,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612699341] [2021-12-18 21:27:21,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:27:21,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 21:27:21,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:27:21,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 21:27:21,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 21:27:21,861 INFO L87 Difference]: Start difference. First operand has 149 states, 79 states have (on average 2.1645569620253164) internal successors, (171), 148 states have internal predecessors, (171), 0 states have call successors, (0), 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 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:21,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:27:21,991 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2021-12-18 21:27:21,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 21:27:21,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-12-18 21:27:21,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:27:22,002 INFO L225 Difference]: With dead ends: 146 [2021-12-18 21:27:22,002 INFO L226 Difference]: Without dead ends: 144 [2021-12-18 21:27:22,003 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 [2021-12-18 21:27:22,006 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 100 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:27:22,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 128 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:27:22,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-18 21:27:22,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-12-18 21:27:22,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 78 states have (on average 1.9487179487179487) internal successors, (152), 143 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:22,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 152 transitions. [2021-12-18 21:27:22,043 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 152 transitions. Word has length 3 [2021-12-18 21:27:22,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:27:22,043 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 152 transitions. [2021-12-18 21:27:22,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:22,043 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 152 transitions. [2021-12-18 21:27:22,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-18 21:27:22,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:27:22,044 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-18 21:27:22,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 21:27:22,044 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:27:22,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:27:22,047 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-18 21:27:22,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:27:22,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465420884] [2021-12-18 21:27:22,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:22,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:27:22,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:22,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:27:22,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465420884] [2021-12-18 21:27:22,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465420884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:27:22,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:27:22,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 21:27:22,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284041971] [2021-12-18 21:27:22,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:27:22,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 21:27:22,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:27:22,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 21:27:22,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 21:27:22,098 INFO L87 Difference]: Start difference. First operand 144 states and 152 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:22,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:27:22,189 INFO L93 Difference]: Finished difference Result 141 states and 149 transitions. [2021-12-18 21:27:22,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 21:27:22,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-12-18 21:27:22,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:27:22,193 INFO L225 Difference]: With dead ends: 141 [2021-12-18 21:27:22,193 INFO L226 Difference]: Without dead ends: 141 [2021-12-18 21:27:22,194 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 [2021-12-18 21:27:22,195 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 97 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:27:22,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 124 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:27:22,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-18 21:27:22,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-12-18 21:27:22,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 78 states have (on average 1.9102564102564104) internal successors, (149), 140 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) [2021-12-18 21:27:22,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 149 transitions. [2021-12-18 21:27:22,205 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 149 transitions. Word has length 3 [2021-12-18 21:27:22,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:27:22,206 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 149 transitions. [2021-12-18 21:27:22,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:22,206 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 149 transitions. [2021-12-18 21:27:22,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 21:27:22,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:27:22,207 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:27:22,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 21:27:22,208 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:27:22,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:27:22,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1837112042, now seen corresponding path program 1 times [2021-12-18 21:27:22,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:27:22,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258940088] [2021-12-18 21:27:22,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:22,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:27:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:22,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:27:22,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258940088] [2021-12-18 21:27:22,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258940088] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:27:22,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:27:22,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 21:27:22,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562530954] [2021-12-18 21:27:22,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:27:22,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 21:27:22,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:27:22,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 21:27:22,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:27:22,298 INFO L87 Difference]: Start difference. First operand 141 states and 149 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) [2021-12-18 21:27:22,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:27:22,443 INFO L93 Difference]: Finished difference Result 132 states and 141 transitions. [2021-12-18 21:27:22,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:27:22,444 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 [2021-12-18 21:27:22,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:27:22,445 INFO L225 Difference]: With dead ends: 132 [2021-12-18 21:27:22,446 INFO L226 Difference]: Without dead ends: 132 [2021-12-18 21:27:22,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:27:22,448 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 168 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:27:22,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 90 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:27:22,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-18 21:27:22,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2021-12-18 21:27:22,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 82 states have (on average 1.7073170731707317) internal successors, (140), 127 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:22,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 140 transitions. [2021-12-18 21:27:22,454 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 140 transitions. Word has length 9 [2021-12-18 21:27:22,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:27:22,454 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 140 transitions. [2021-12-18 21:27:22,454 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) [2021-12-18 21:27:22,454 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 140 transitions. [2021-12-18 21:27:22,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 21:27:22,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:27:22,455 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:27:22,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-18 21:27:22,455 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:27:22,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:27:22,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1837112043, now seen corresponding path program 1 times [2021-12-18 21:27:22,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:27:22,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159117594] [2021-12-18 21:27:22,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:22,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:27:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:22,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:27:22,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159117594] [2021-12-18 21:27:22,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159117594] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:27:22,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:27:22,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:27:22,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772873500] [2021-12-18 21:27:22,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:27:22,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:27:22,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:27:22,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:27:22,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:27:22,559 INFO L87 Difference]: Start difference. First operand 128 states and 140 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 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) [2021-12-18 21:27:22,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:27:22,750 INFO L93 Difference]: Finished difference Result 176 states and 190 transitions. [2021-12-18 21:27:22,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 21:27:22,750 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 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 [2021-12-18 21:27:22,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:27:22,751 INFO L225 Difference]: With dead ends: 176 [2021-12-18 21:27:22,751 INFO L226 Difference]: Without dead ends: 176 [2021-12-18 21:27:22,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:27:22,752 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 226 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:27:22,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 144 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:27:22,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-18 21:27:22,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 157. [2021-12-18 21:27:22,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 111 states have (on average 1.5945945945945945) internal successors, (177), 156 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:22,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 177 transitions. [2021-12-18 21:27:22,758 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 177 transitions. Word has length 9 [2021-12-18 21:27:22,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:27:22,759 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 177 transitions. [2021-12-18 21:27:22,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 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) [2021-12-18 21:27:22,759 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 177 transitions. [2021-12-18 21:27:22,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-18 21:27:22,759 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:27:22,759 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:27:22,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 21:27:22,760 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:27:22,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:27:22,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1363413642, now seen corresponding path program 1 times [2021-12-18 21:27:22,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:27:22,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256852279] [2021-12-18 21:27:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:22,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:27:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:22,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:27:22,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256852279] [2021-12-18 21:27:22,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256852279] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:27:22,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:27:22,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:27:22,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870681675] [2021-12-18 21:27:22,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:27:22,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:27:22,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:27:22,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:27:22,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:27:22,833 INFO L87 Difference]: Start difference. First operand 157 states and 177 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:22,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:27:22,981 INFO L93 Difference]: Finished difference Result 156 states and 175 transitions. [2021-12-18 21:27:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:27:22,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-18 21:27:22,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:27:22,982 INFO L225 Difference]: With dead ends: 156 [2021-12-18 21:27:22,982 INFO L226 Difference]: Without dead ends: 156 [2021-12-18 21:27:22,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:27:22,983 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 6 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:27:22,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 297 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:27:22,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-18 21:27:22,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2021-12-18 21:27:22,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 111 states have (on average 1.5765765765765767) internal successors, (175), 155 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:22,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 175 transitions. [2021-12-18 21:27:22,987 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 175 transitions. Word has length 12 [2021-12-18 21:27:22,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:27:22,988 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 175 transitions. [2021-12-18 21:27:22,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:22,988 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 175 transitions. [2021-12-18 21:27:22,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-18 21:27:22,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:27:22,988 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:27:22,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-18 21:27:22,988 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:27:22,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:27:22,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1363413643, now seen corresponding path program 1 times [2021-12-18 21:27:22,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:27:22,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221494631] [2021-12-18 21:27:22,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:22,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:27:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:23,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:27:23,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221494631] [2021-12-18 21:27:23,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221494631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:27:23,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:27:23,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:27:23,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35157865] [2021-12-18 21:27:23,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:27:23,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:27:23,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:27:23,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:27:23,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:27:23,046 INFO L87 Difference]: Start difference. First operand 156 states and 175 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:23,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:27:23,164 INFO L93 Difference]: Finished difference Result 155 states and 173 transitions. [2021-12-18 21:27:23,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:27:23,164 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-18 21:27:23,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:27:23,165 INFO L225 Difference]: With dead ends: 155 [2021-12-18 21:27:23,165 INFO L226 Difference]: Without dead ends: 155 [2021-12-18 21:27:23,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:27:23,166 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 7 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:27:23,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 315 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:27:23,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-18 21:27:23,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-12-18 21:27:23,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 111 states have (on average 1.5585585585585586) internal successors, (173), 154 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:23,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 173 transitions. [2021-12-18 21:27:23,170 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 173 transitions. Word has length 12 [2021-12-18 21:27:23,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:27:23,170 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 173 transitions. [2021-12-18 21:27:23,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:23,170 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 173 transitions. [2021-12-18 21:27:23,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 21:27:23,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:27:23,171 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:27:23,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-18 21:27:23,171 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:27:23,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:27:23,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1455563597, now seen corresponding path program 1 times [2021-12-18 21:27:23,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:27:23,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628732066] [2021-12-18 21:27:23,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:23,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:27:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:23,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:23,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:27:23,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628732066] [2021-12-18 21:27:23,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628732066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:27:23,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:27:23,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:27:23,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606991748] [2021-12-18 21:27:23,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:27:23,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 21:27:23,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:27:23,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 21:27:23,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:27:23,199 INFO L87 Difference]: Start difference. First operand 155 states and 173 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:23,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:27:23,284 INFO L93 Difference]: Finished difference Result 167 states and 180 transitions. [2021-12-18 21:27:23,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 21:27:23,284 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-12-18 21:27:23,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:27:23,285 INFO L225 Difference]: With dead ends: 167 [2021-12-18 21:27:23,285 INFO L226 Difference]: Without dead ends: 167 [2021-12-18 21:27:23,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:27:23,286 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 158 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:27:23,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 190 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:27:23,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-18 21:27:23,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 155. [2021-12-18 21:27:23,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 111 states have (on average 1.5315315315315314) internal successors, (170), 154 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:23,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 170 transitions. [2021-12-18 21:27:23,289 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 170 transitions. Word has length 15 [2021-12-18 21:27:23,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:27:23,290 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 170 transitions. [2021-12-18 21:27:23,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:23,290 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 170 transitions. [2021-12-18 21:27:23,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 21:27:23,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:27:23,290 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:27:23,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-18 21:27:23,291 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:27:23,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:27:23,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1546362871, now seen corresponding path program 1 times [2021-12-18 21:27:23,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:27:23,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080606944] [2021-12-18 21:27:23,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:23,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:27:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:23,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:27:23,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080606944] [2021-12-18 21:27:23,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080606944] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:27:23,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:27:23,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 21:27:23,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229961488] [2021-12-18 21:27:23,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:27:23,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 21:27:23,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:27:23,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 21:27:23,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:27:23,388 INFO L87 Difference]: Start difference. First operand 155 states and 170 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 9 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) [2021-12-18 21:27:23,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:27:23,611 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2021-12-18 21:27:23,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 21:27:23,611 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 9 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 [2021-12-18 21:27:23,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:27:23,612 INFO L225 Difference]: With dead ends: 155 [2021-12-18 21:27:23,613 INFO L226 Difference]: Without dead ends: 155 [2021-12-18 21:27:23,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-12-18 21:27:23,615 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 168 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:27:23,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 213 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:27:23,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-18 21:27:23,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2021-12-18 21:27:23,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 111 states have (on average 1.5225225225225225) internal successors, (169), 153 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:23,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 169 transitions. [2021-12-18 21:27:23,619 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 169 transitions. Word has length 16 [2021-12-18 21:27:23,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:27:23,623 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 169 transitions. [2021-12-18 21:27:23,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 9 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) [2021-12-18 21:27:23,623 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 169 transitions. [2021-12-18 21:27:23,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 21:27:23,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:27:23,624 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:27:23,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-18 21:27:23,624 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:27:23,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:27:23,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1546362872, now seen corresponding path program 1 times [2021-12-18 21:27:23,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:27:23,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652422185] [2021-12-18 21:27:23,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:23,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:27:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:23,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:27:23,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652422185] [2021-12-18 21:27:23,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652422185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:27:23,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:27:23,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 21:27:23,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066708954] [2021-12-18 21:27:23,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:27:23,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 21:27:23,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:27:23,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 21:27:23,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:27:23,763 INFO L87 Difference]: Start difference. First operand 154 states and 169 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 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) [2021-12-18 21:27:24,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:27:24,120 INFO L93 Difference]: Finished difference Result 152 states and 166 transitions. [2021-12-18 21:27:24,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 21:27:24,120 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 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 [2021-12-18 21:27:24,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:27:24,121 INFO L225 Difference]: With dead ends: 152 [2021-12-18 21:27:24,121 INFO L226 Difference]: Without dead ends: 152 [2021-12-18 21:27:24,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-12-18 21:27:24,122 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 161 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:27:24,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 261 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:27:24,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-18 21:27:24,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 141. [2021-12-18 21:27:24,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 103 states have (on average 1.5048543689320388) internal successors, (155), 140 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:24,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 155 transitions. [2021-12-18 21:27:24,124 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 155 transitions. Word has length 16 [2021-12-18 21:27:24,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:27:24,124 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 155 transitions. [2021-12-18 21:27:24,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 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) [2021-12-18 21:27:24,124 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 155 transitions. [2021-12-18 21:27:24,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 21:27:24,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:27:24,125 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:27:24,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-18 21:27:24,125 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:27:24,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:27:24,126 INFO L85 PathProgramCache]: Analyzing trace with hash 743663712, now seen corresponding path program 1 times [2021-12-18 21:27:24,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:27:24,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633085067] [2021-12-18 21:27:24,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:24,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:27:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:24,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:27:24,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633085067] [2021-12-18 21:27:24,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633085067] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:27:24,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:27:24,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 21:27:24,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953388838] [2021-12-18 21:27:24,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:27:24,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:27:24,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:27:24,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:27:24,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:27:24,176 INFO L87 Difference]: Start difference. First operand 141 states and 155 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:24,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:27:24,311 INFO L93 Difference]: Finished difference Result 162 states and 178 transitions. [2021-12-18 21:27:24,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 21:27:24,311 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-18 21:27:24,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:27:24,312 INFO L225 Difference]: With dead ends: 162 [2021-12-18 21:27:24,312 INFO L226 Difference]: Without dead ends: 162 [2021-12-18 21:27:24,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:27:24,312 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 27 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:27:24,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 442 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:27:24,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-18 21:27:24,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 149. [2021-12-18 21:27:24,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 111 states have (on average 1.4774774774774775) internal successors, (164), 148 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:24,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 164 transitions. [2021-12-18 21:27:24,316 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 164 transitions. Word has length 18 [2021-12-18 21:27:24,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:27:24,316 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 164 transitions. [2021-12-18 21:27:24,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:24,316 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 164 transitions. [2021-12-18 21:27:24,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-18 21:27:24,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:27:24,318 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:27:24,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-18 21:27:24,318 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:27:24,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:27:24,318 INFO L85 PathProgramCache]: Analyzing trace with hash -573987105, now seen corresponding path program 1 times [2021-12-18 21:27:24,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:27:24,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260098435] [2021-12-18 21:27:24,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:24,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:27:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:24,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:27:24,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260098435] [2021-12-18 21:27:24,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260098435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:27:24,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:27:24,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 21:27:24,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736599337] [2021-12-18 21:27:24,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:27:24,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:27:24,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:27:24,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:27:24,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:27:24,374 INFO L87 Difference]: Start difference. First operand 149 states and 164 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:24,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:27:24,512 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2021-12-18 21:27:24,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:27:24,512 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-18 21:27:24,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:27:24,513 INFO L225 Difference]: With dead ends: 168 [2021-12-18 21:27:24,513 INFO L226 Difference]: Without dead ends: 168 [2021-12-18 21:27:24,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:27:24,513 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 25 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:27:24,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 319 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:27:24,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-18 21:27:24,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 159. [2021-12-18 21:27:24,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 121 states have (on average 1.462809917355372) internal successors, (177), 158 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:24,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 177 transitions. [2021-12-18 21:27:24,516 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 177 transitions. Word has length 20 [2021-12-18 21:27:24,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:27:24,516 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 177 transitions. [2021-12-18 21:27:24,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:24,516 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 177 transitions. [2021-12-18 21:27:24,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-18 21:27:24,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:27:24,516 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, 1] [2021-12-18 21:27:24,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-18 21:27:24,517 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:27:24,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:27:24,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1867739349, now seen corresponding path program 1 times [2021-12-18 21:27:24,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:27:24,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618818321] [2021-12-18 21:27:24,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:24,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:27:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:24,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:27:24,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618818321] [2021-12-18 21:27:24,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618818321] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:27:24,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:27:24,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:27:24,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169857291] [2021-12-18 21:27:24,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:27:24,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:27:24,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:27:24,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:27:24,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:27:24,547 INFO L87 Difference]: Start difference. First operand 159 states and 177 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:24,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:27:24,651 INFO L93 Difference]: Finished difference Result 158 states and 175 transitions. [2021-12-18 21:27:24,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:27:24,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-18 21:27:24,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:27:24,652 INFO L225 Difference]: With dead ends: 158 [2021-12-18 21:27:24,652 INFO L226 Difference]: Without dead ends: 158 [2021-12-18 21:27:24,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:27:24,653 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 9 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:27:24,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 294 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:27:24,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-18 21:27:24,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-12-18 21:27:24,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 121 states have (on average 1.4462809917355373) internal successors, (175), 157 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:24,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 175 transitions. [2021-12-18 21:27:24,655 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 175 transitions. Word has length 22 [2021-12-18 21:27:24,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:27:24,655 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 175 transitions. [2021-12-18 21:27:24,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:24,655 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 175 transitions. [2021-12-18 21:27:24,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-18 21:27:24,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:27:24,656 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, 1] [2021-12-18 21:27:24,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-18 21:27:24,656 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:27:24,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:27:24,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1867739348, now seen corresponding path program 1 times [2021-12-18 21:27:24,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:27:24,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081882709] [2021-12-18 21:27:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:24,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:27:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:24,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:27:24,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081882709] [2021-12-18 21:27:24,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081882709] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:27:24,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:27:24,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:27:24,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619900285] [2021-12-18 21:27:24,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:27:24,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:27:24,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:27:24,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:27:24,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:27:24,695 INFO L87 Difference]: Start difference. First operand 158 states and 175 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:24,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:27:24,811 INFO L93 Difference]: Finished difference Result 157 states and 173 transitions. [2021-12-18 21:27:24,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:27:24,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-18 21:27:24,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:27:24,812 INFO L225 Difference]: With dead ends: 157 [2021-12-18 21:27:24,812 INFO L226 Difference]: Without dead ends: 157 [2021-12-18 21:27:24,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:27:24,813 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 4 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:27:24,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 284 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:27:24,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-12-18 21:27:24,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-12-18 21:27:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 121 states have (on average 1.4297520661157024) internal successors, (173), 156 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:24,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 173 transitions. [2021-12-18 21:27:24,815 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 173 transitions. Word has length 22 [2021-12-18 21:27:24,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:27:24,815 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 173 transitions. [2021-12-18 21:27:24,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:24,815 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 173 transitions. [2021-12-18 21:27:24,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-18 21:27:24,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:27:24,816 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, 1, 1, 1, 1, 1] [2021-12-18 21:27:24,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-18 21:27:24,816 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:27:24,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:27:24,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1012469357, now seen corresponding path program 1 times [2021-12-18 21:27:24,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:27:24,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160870541] [2021-12-18 21:27:24,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:24,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:27:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:24,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:27:24,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160870541] [2021-12-18 21:27:24,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160870541] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:27:24,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:27:24,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 21:27:24,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080367653] [2021-12-18 21:27:24,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:27:24,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 21:27:24,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:27:24,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 21:27:24,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:27:24,883 INFO L87 Difference]: Start difference. First operand 157 states and 173 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:25,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:27:25,089 INFO L93 Difference]: Finished difference Result 157 states and 172 transitions. [2021-12-18 21:27:25,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 21:27:25,089 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-18 21:27:25,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:27:25,090 INFO L225 Difference]: With dead ends: 157 [2021-12-18 21:27:25,090 INFO L226 Difference]: Without dead ends: 157 [2021-12-18 21:27:25,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-12-18 21:27:25,091 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 144 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:27:25,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 207 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:27:25,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-12-18 21:27:25,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2021-12-18 21:27:25,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 121 states have (on average 1.421487603305785) internal successors, (172), 155 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:25,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 172 transitions. [2021-12-18 21:27:25,093 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 172 transitions. Word has length 26 [2021-12-18 21:27:25,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:27:25,093 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 172 transitions. [2021-12-18 21:27:25,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:25,093 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 172 transitions. [2021-12-18 21:27:25,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-18 21:27:25,094 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:27:25,094 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, 1, 1, 1, 1, 1] [2021-12-18 21:27:25,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-18 21:27:25,094 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:27:25,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:27:25,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1012469358, now seen corresponding path program 1 times [2021-12-18 21:27:25,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:27:25,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539159656] [2021-12-18 21:27:25,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:25,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:27:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:25,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:27:25,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539159656] [2021-12-18 21:27:25,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539159656] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:27:25,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:27:25,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 21:27:25,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450425806] [2021-12-18 21:27:25,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:27:25,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 21:27:25,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:27:25,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 21:27:25,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:27:25,192 INFO L87 Difference]: Start difference. First operand 156 states and 172 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:25,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:27:25,479 INFO L93 Difference]: Finished difference Result 156 states and 171 transitions. [2021-12-18 21:27:25,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 21:27:25,480 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-18 21:27:25,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:27:25,480 INFO L225 Difference]: With dead ends: 156 [2021-12-18 21:27:25,480 INFO L226 Difference]: Without dead ends: 156 [2021-12-18 21:27:25,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-12-18 21:27:25,481 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 141 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:27:25,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 279 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:27:25,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-18 21:27:25,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2021-12-18 21:27:25,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 121 states have (on average 1.4049586776859504) internal successors, (170), 153 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:25,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 170 transitions. [2021-12-18 21:27:25,483 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 170 transitions. Word has length 26 [2021-12-18 21:27:25,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:27:25,483 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 170 transitions. [2021-12-18 21:27:25,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:25,483 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 170 transitions. [2021-12-18 21:27:25,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-18 21:27:25,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:27:25,484 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] [2021-12-18 21:27:25,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-18 21:27:25,484 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:27:25,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:27:25,484 INFO L85 PathProgramCache]: Analyzing trace with hash -560637622, now seen corresponding path program 1 times [2021-12-18 21:27:25,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:27:25,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828725444] [2021-12-18 21:27:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:25,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:27:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:25,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:27:25,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828725444] [2021-12-18 21:27:25,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828725444] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:27:25,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334508482] [2021-12-18 21:27:25,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:25,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:27:25,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:27:25,627 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) [2021-12-18 21:27:25,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 21:27:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:25,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-18 21:27:25,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:27:25,781 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:27:25,863 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:27:25,864 INFO L388 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 11 treesize of output 11 [2021-12-18 21:27:25,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:27:25,967 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:27:25,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2021-12-18 21:27:26,030 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:27:26,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-12-18 21:27:26,065 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:27:26,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2021-12-18 21:27:26,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:27:26,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:27:26,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2021-12-18 21:27:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:26,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:27:26,383 INFO L354 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2021-12-18 21:27:26,384 INFO L388 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 19 treesize of output 18 [2021-12-18 21:27:26,393 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_484 (Array Int Int)) (|v_ULTIMATE.start_main_~x~0#1.offset_76| Int)) (or (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_484) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_76|) |c_ULTIMATE.start_main_~x~0#1.base|) (< |c_ULTIMATE.start_main_~head~0#1.offset| |v_ULTIMATE.start_main_~x~0#1.offset_76|) (< |v_ULTIMATE.start_main_~x~0#1.offset_76| 0))) is different from false [2021-12-18 21:27:26,408 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_484 (Array Int Int)) (|v_ULTIMATE.start_main_~x~0#1.offset_76| Int)) (or (< |c_ULTIMATE.start_main_~head~0#1.offset| |v_ULTIMATE.start_main_~x~0#1.offset_76|) (< |v_ULTIMATE.start_main_~x~0#1.offset_76| 0) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem5#1.base| v_ArrVal_484) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_76|) |c_ULTIMATE.start_main_#t~mem5#1.base|))) is different from false [2021-12-18 21:27:26,420 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_484 (Array Int Int)) (|v_ULTIMATE.start_main_~x~0#1.offset_76| Int)) (or (< |c_ULTIMATE.start_main_~head~0#1.offset| |v_ULTIMATE.start_main_~x~0#1.offset_76|) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_484) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_76|) .cse0)) (< |v_ULTIMATE.start_main_~x~0#1.offset_76| 0))) is different from false [2021-12-18 21:27:26,445 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_482 (Array Int Int)) (v_ArrVal_484 (Array Int Int)) (|v_ULTIMATE.start_main_~x~0#1.offset_76| Int)) (or (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_482))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (= (select (select (store .cse0 .cse1 v_ArrVal_484) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_76|) .cse1))) (< |c_ULTIMATE.start_main_~head~0#1.offset| |v_ULTIMATE.start_main_~x~0#1.offset_76|) (< |v_ULTIMATE.start_main_~x~0#1.offset_76| 0))) is different from false [2021-12-18 21:27:26,458 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_482 (Array Int Int)) (v_ArrVal_484 (Array Int Int)) (|v_ULTIMATE.start_main_~x~0#1.offset_76| Int)) (or (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_482))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (= (select (select (store .cse0 .cse1 v_ArrVal_484) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_76|) .cse1))) (< |c_ULTIMATE.start_main_~head~0#1.offset| |v_ULTIMATE.start_main_~x~0#1.offset_76|) (< |v_ULTIMATE.start_main_~x~0#1.offset_76| 0))) is different from false [2021-12-18 21:27:26,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:27:26,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 36 [2021-12-18 21:27:26,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:27:26,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 137 [2021-12-18 21:27:26,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2021-12-18 21:27:26,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:27:26,499 INFO L388 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 114 treesize of output 102 [2021-12-18 21:27:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:26,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334508482] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:27:26,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 21:27:26,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 15] total 34 [2021-12-18 21:27:26,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783405246] [2021-12-18 21:27:26,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 21:27:26,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-18 21:27:26,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:27:26,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-18 21:27:26,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=780, Unknown=7, NotChecked=300, Total=1190 [2021-12-18 21:27:26,946 INFO L87 Difference]: Start difference. First operand 154 states and 170 transitions. Second operand has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:27,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:27:27,881 INFO L93 Difference]: Finished difference Result 280 states and 306 transitions. [2021-12-18 21:27:27,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 21:27:27,881 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-18 21:27:27,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:27:27,882 INFO L225 Difference]: With dead ends: 280 [2021-12-18 21:27:27,882 INFO L226 Difference]: Without dead ends: 280 [2021-12-18 21:27:27,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=287, Invalid=1366, Unknown=7, NotChecked=410, Total=2070 [2021-12-18 21:27:27,883 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 570 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 2560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1131 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:27:27,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 846 Invalid, 2560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1319 Invalid, 0 Unknown, 1131 Unchecked, 0.5s Time] [2021-12-18 21:27:27,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-12-18 21:27:27,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 175. [2021-12-18 21:27:27,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 142 states have (on average 1.3732394366197183) internal successors, (195), 174 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:27,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 195 transitions. [2021-12-18 21:27:27,886 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 195 transitions. Word has length 29 [2021-12-18 21:27:27,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:27:27,886 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 195 transitions. [2021-12-18 21:27:27,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:27,886 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 195 transitions. [2021-12-18 21:27:27,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-18 21:27:27,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:27:27,887 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] [2021-12-18 21:27:27,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 21:27:28,095 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,SelfDestructingSolverStorable15 [2021-12-18 21:27:28,095 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:27:28,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:27:28,096 INFO L85 PathProgramCache]: Analyzing trace with hash -560637621, now seen corresponding path program 1 times [2021-12-18 21:27:28,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:27:28,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010473208] [2021-12-18 21:27:28,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:28,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:27:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:28,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:28,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:27:28,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010473208] [2021-12-18 21:27:28,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010473208] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:27:28,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771306894] [2021-12-18 21:27:28,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:28,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:27:28,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:27:28,290 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) [2021-12-18 21:27:28,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 21:27:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:28,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-18 21:27:28,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:27:28,405 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:27:28,458 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:27:28,464 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:27:28,465 INFO L388 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 11 treesize of output 11 [2021-12-18 21:27:28,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:27:28,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:27:28,589 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:27:28,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-12-18 21:27:28,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-18 21:27:28,689 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:27:28,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-18 21:27:28,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 21:27:28,707 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:27:28,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2021-12-18 21:27:28,742 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:27:28,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-12-18 21:27:28,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-18 21:27:28,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:27:28,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-18 21:27:28,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:27:28,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:27:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:28,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:27:29,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:27:29,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 103 [2021-12-18 21:27:29,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:27:29,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 79 [2021-12-18 21:27:29,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:27:29,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 386 treesize of output 349 [2021-12-18 21:27:29,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:27:29,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1029 treesize of output 988 [2021-12-18 21:27:29,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 957 treesize of output 925 [2021-12-18 21:27:29,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 925 treesize of output 909 [2021-12-18 21:27:29,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 909 treesize of output 877 [2021-12-18 21:27:29,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:27:29,929 INFO L388 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 877 treesize of output 830 [2021-12-18 21:27:29,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 821 treesize of output 805 [2021-12-18 21:27:29,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 805 treesize of output 797 [2021-12-18 21:27:29,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 797 treesize of output 785 [2021-12-18 21:27:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:33,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771306894] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:27:33,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 21:27:33,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 37 [2021-12-18 21:27:33,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705992876] [2021-12-18 21:27:33,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 21:27:33,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-18 21:27:33,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:27:33,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-18 21:27:33,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1255, Unknown=19, NotChecked=0, Total=1406 [2021-12-18 21:27:33,819 INFO L87 Difference]: Start difference. First operand 175 states and 195 transitions. Second operand has 38 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 38 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) [2021-12-18 21:27:35,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:27:35,312 INFO L93 Difference]: Finished difference Result 294 states and 323 transitions. [2021-12-18 21:27:35,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 21:27:35,312 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 38 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 29 [2021-12-18 21:27:35,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:27:35,313 INFO L225 Difference]: With dead ends: 294 [2021-12-18 21:27:35,313 INFO L226 Difference]: Without dead ends: 294 [2021-12-18 21:27:35,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 33 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=466, Invalid=2707, Unknown=19, NotChecked=0, Total=3192 [2021-12-18 21:27:35,314 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 753 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 1755 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1398 SdHoareTripleChecker+Invalid, 2790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 902 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 21:27:35,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 1398 Invalid, 2790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1755 Invalid, 0 Unknown, 902 Unchecked, 0.8s Time] [2021-12-18 21:27:35,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-12-18 21:27:35,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 173. [2021-12-18 21:27:35,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 146 states have (on average 1.356164383561644) internal successors, (198), 172 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) [2021-12-18 21:27:35,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 198 transitions. [2021-12-18 21:27:35,317 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 198 transitions. Word has length 29 [2021-12-18 21:27:35,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:27:35,317 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 198 transitions. [2021-12-18 21:27:35,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 38 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) [2021-12-18 21:27:35,318 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 198 transitions. [2021-12-18 21:27:35,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-18 21:27:35,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:27:35,318 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, 1, 1] [2021-12-18 21:27:35,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 21:27:35,527 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,SelfDestructingSolverStorable16 [2021-12-18 21:27:35,527 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:27:35,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:27:35,528 INFO L85 PathProgramCache]: Analyzing trace with hash -557177017, now seen corresponding path program 1 times [2021-12-18 21:27:35,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:27:35,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798910809] [2021-12-18 21:27:35,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:35,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:27:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:35,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:27:35,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798910809] [2021-12-18 21:27:35,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798910809] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:27:35,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540948948] [2021-12-18 21:27:35,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:35,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:27:35,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:27:35,680 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) [2021-12-18 21:27:35,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 21:27:35,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:35,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-18 21:27:35,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:27:35,768 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:27:35,835 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 21:27:35,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-18 21:27:35,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:27:35,955 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:27:35,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2021-12-18 21:27:36,034 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:27:36,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2021-12-18 21:27:36,053 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:27:36,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2021-12-18 21:27:36,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:27:36,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2021-12-18 21:27:36,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:27:36,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-18 21:27:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:36,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:27:36,576 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:27:36,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2021-12-18 21:27:36,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:27:36,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 227 [2021-12-18 21:27:36,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:27:36,593 INFO L388 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 212 treesize of output 204 [2021-12-18 21:27:36,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 188 [2021-12-18 21:27:39,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:39,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540948948] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:27:39,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 21:27:39,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 32 [2021-12-18 21:27:39,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410964978] [2021-12-18 21:27:39,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 21:27:39,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-18 21:27:39,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:27:39,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-18 21:27:39,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=883, Unknown=22, NotChecked=0, Total=1056 [2021-12-18 21:27:39,469 INFO L87 Difference]: Start difference. First operand 173 states and 198 transitions. Second operand has 33 states, 32 states have (on average 2.53125) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:39,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:27:39,912 INFO L93 Difference]: Finished difference Result 243 states and 274 transitions. [2021-12-18 21:27:39,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 21:27:39,912 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.53125) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-18 21:27:39,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:27:39,914 INFO L225 Difference]: With dead ends: 243 [2021-12-18 21:27:39,914 INFO L226 Difference]: Without dead ends: 243 [2021-12-18 21:27:39,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=245, Invalid=1215, Unknown=22, NotChecked=0, Total=1482 [2021-12-18 21:27:39,915 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 454 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 1792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 981 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:27:39,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 902 Invalid, 1792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 736 Invalid, 0 Unknown, 981 Unchecked, 0.3s Time] [2021-12-18 21:27:39,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-18 21:27:39,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 180. [2021-12-18 21:27:39,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 153 states have (on average 1.3529411764705883) internal successors, (207), 179 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:39,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 207 transitions. [2021-12-18 21:27:39,918 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 207 transitions. Word has length 31 [2021-12-18 21:27:39,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:27:39,918 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 207 transitions. [2021-12-18 21:27:39,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.53125) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:39,918 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 207 transitions. [2021-12-18 21:27:39,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-18 21:27:39,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:27:39,919 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, 1, 1] [2021-12-18 21:27:39,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 21:27:40,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-18 21:27:40,125 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:27:40,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:27:40,126 INFO L85 PathProgramCache]: Analyzing trace with hash -557177016, now seen corresponding path program 1 times [2021-12-18 21:27:40,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:27:40,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840041625] [2021-12-18 21:27:40,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:40,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:27:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:40,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:27:40,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840041625] [2021-12-18 21:27:40,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840041625] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:27:40,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506557898] [2021-12-18 21:27:40,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:40,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:27:40,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:27:40,320 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) [2021-12-18 21:27:40,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 21:27:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:40,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-18 21:27:40,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:27:40,455 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:27:40,519 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:27:40,519 INFO L388 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 11 treesize of output 11 [2021-12-18 21:27:40,526 INFO L388 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 6 treesize of output 5 [2021-12-18 21:27:40,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:27:40,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:27:40,638 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:27:40,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-12-18 21:27:40,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-18 21:27:40,724 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:27:40,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2021-12-18 21:27:40,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:27:40,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:27:40,759 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:27:40,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-12-18 21:27:40,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-18 21:27:40,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:27:40,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2021-12-18 21:27:40,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:27:40,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:27:40,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:27:40,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-18 21:27:40,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:27:40,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:27:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:40,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:27:41,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:27:41,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 105 [2021-12-18 21:27:41,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:27:41,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 81 [2021-12-18 21:27:41,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:27:41,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 390 treesize of output 353 [2021-12-18 21:27:41,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:27:41,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1061 treesize of output 1020 [2021-12-18 21:27:41,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 989 treesize of output 957 [2021-12-18 21:27:41,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 957 treesize of output 925 [2021-12-18 21:27:41,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 925 treesize of output 909 [2021-12-18 21:27:41,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:27:41,834 INFO L388 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 909 treesize of output 862 [2021-12-18 21:27:41,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 853 treesize of output 845 [2021-12-18 21:27:41,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 845 treesize of output 829 [2021-12-18 21:27:41,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 829 treesize of output 817 [2021-12-18 21:27:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:48,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506557898] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:27:48,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 21:27:48,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 34 [2021-12-18 21:27:48,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038732125] [2021-12-18 21:27:48,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 21:27:48,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-18 21:27:48,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:27:48,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-18 21:27:48,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1047, Unknown=20, NotChecked=0, Total=1190 [2021-12-18 21:27:48,323 INFO L87 Difference]: Start difference. First operand 180 states and 207 transitions. Second operand has 35 states, 34 states have (on average 2.676470588235294) internal successors, (91), 35 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) [2021-12-18 21:27:49,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:27:49,246 INFO L93 Difference]: Finished difference Result 244 states and 275 transitions. [2021-12-18 21:27:49,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 21:27:49,246 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.676470588235294) internal successors, (91), 35 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 31 [2021-12-18 21:27:49,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:27:49,247 INFO L225 Difference]: With dead ends: 244 [2021-12-18 21:27:49,247 INFO L226 Difference]: Without dead ends: 244 [2021-12-18 21:27:49,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=333, Invalid=1903, Unknown=20, NotChecked=0, Total=2256 [2021-12-18 21:27:49,248 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 560 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 781 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:27:49,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 856 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 798 Invalid, 0 Unknown, 781 Unchecked, 0.4s Time] [2021-12-18 21:27:49,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-12-18 21:27:49,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 180. [2021-12-18 21:27:49,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 153 states have (on average 1.34640522875817) internal successors, (206), 179 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:49,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 206 transitions. [2021-12-18 21:27:49,250 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 206 transitions. Word has length 31 [2021-12-18 21:27:49,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:27:49,251 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 206 transitions. [2021-12-18 21:27:49,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.676470588235294) internal successors, (91), 35 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) [2021-12-18 21:27:49,251 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 206 transitions. [2021-12-18 21:27:49,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-18 21:27:49,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:27:49,251 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-12-18 21:27:49,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 21:27:49,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:27:49,459 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:27:49,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:27:49,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1435398869, now seen corresponding path program 1 times [2021-12-18 21:27:49,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:27:49,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376686308] [2021-12-18 21:27:49,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:49,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:27:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:49,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:27:49,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:27:49,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376686308] [2021-12-18 21:27:49,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376686308] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:27:49,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582844682] [2021-12-18 21:27:49,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:49,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:27:49,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:27:49,555 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) [2021-12-18 21:27:49,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 21:27:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:49,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 21:27:49,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:27:49,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-12-18 21:27:49,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-12-18 21:27:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:27:49,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:27:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 21:27:49,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582844682] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:27:49,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 21:27:49,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2021-12-18 21:27:49,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846395520] [2021-12-18 21:27:49,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 21:27:49,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 21:27:49,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:27:49,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 21:27:49,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-18 21:27:49,912 INFO L87 Difference]: Start difference. First operand 180 states and 206 transitions. Second operand has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 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) [2021-12-18 21:27:50,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:27:50,455 INFO L93 Difference]: Finished difference Result 188 states and 207 transitions. [2021-12-18 21:27:50,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 21:27:50,455 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 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 34 [2021-12-18 21:27:50,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:27:50,456 INFO L225 Difference]: With dead ends: 188 [2021-12-18 21:27:50,456 INFO L226 Difference]: Without dead ends: 188 [2021-12-18 21:27:50,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2021-12-18 21:27:50,457 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 441 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:27:50,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 328 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 21:27:50,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-18 21:27:50,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 168. [2021-12-18 21:27:50,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 143 states have (on average 1.3216783216783217) internal successors, (189), 167 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:50,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 189 transitions. [2021-12-18 21:27:50,459 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 189 transitions. Word has length 34 [2021-12-18 21:27:50,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:27:50,459 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 189 transitions. [2021-12-18 21:27:50,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 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) [2021-12-18 21:27:50,460 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 189 transitions. [2021-12-18 21:27:50,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-18 21:27:50,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:27:50,460 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:27:50,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 21:27:50,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:27:50,668 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:27:50,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:27:50,669 INFO L85 PathProgramCache]: Analyzing trace with hash -605799936, now seen corresponding path program 1 times [2021-12-18 21:27:50,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:27:50,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143909749] [2021-12-18 21:27:50,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:50,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:27:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:50,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:27:50,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143909749] [2021-12-18 21:27:50,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143909749] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:27:50,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103985272] [2021-12-18 21:27:50,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:50,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:27:50,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:27:50,851 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) [2021-12-18 21:27:50,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 21:27:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:50,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-18 21:27:50,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:27:51,114 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 21:27:51,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-18 21:27:51,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:27:51,241 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:27:51,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2021-12-18 21:27:51,348 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:27:51,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2021-12-18 21:27:51,372 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:27:51,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2021-12-18 21:27:51,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:27:51,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-18 21:27:51,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:51,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:27:51,881 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:27:51,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2021-12-18 21:27:51,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:27:51,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 227 [2021-12-18 21:27:51,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:27:51,898 INFO L388 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 212 treesize of output 204 [2021-12-18 21:27:51,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 188 [2021-12-18 21:27:55,442 INFO L354 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2021-12-18 21:27:55,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 103 [2021-12-18 21:27:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:55,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103985272] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:27:55,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 21:27:55,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 15] total 36 [2021-12-18 21:27:55,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897583177] [2021-12-18 21:27:55,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 21:27:55,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-18 21:27:55,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:27:55,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-18 21:27:55,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1142, Unknown=21, NotChecked=0, Total=1332 [2021-12-18 21:27:55,577 INFO L87 Difference]: Start difference. First operand 168 states and 189 transitions. Second operand has 37 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:56,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:27:56,009 INFO L93 Difference]: Finished difference Result 235 states and 261 transitions. [2021-12-18 21:27:56,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 21:27:56,010 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-18 21:27:56,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:27:56,010 INFO L225 Difference]: With dead ends: 235 [2021-12-18 21:27:56,010 INFO L226 Difference]: Without dead ends: 235 [2021-12-18 21:27:56,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=299, Invalid=1572, Unknown=21, NotChecked=0, Total=1892 [2021-12-18 21:27:56,015 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 369 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 762 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:27:56,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 741 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 685 Invalid, 0 Unknown, 762 Unchecked, 0.3s Time] [2021-12-18 21:27:56,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-12-18 21:27:56,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 201. [2021-12-18 21:27:56,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 176 states have (on average 1.2897727272727273) internal successors, (227), 200 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:56,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 227 transitions. [2021-12-18 21:27:56,018 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 227 transitions. Word has length 36 [2021-12-18 21:27:56,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:27:56,018 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 227 transitions. [2021-12-18 21:27:56,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:56,018 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 227 transitions. [2021-12-18 21:27:56,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-18 21:27:56,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:27:56,019 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:27:56,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 21:27:56,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:27:56,234 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr45REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:27:56,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:27:56,235 INFO L85 PathProgramCache]: Analyzing trace with hash -605799935, now seen corresponding path program 1 times [2021-12-18 21:27:56,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:27:56,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830942403] [2021-12-18 21:27:56,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:56,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:27:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:56,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:27:56,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830942403] [2021-12-18 21:27:56,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830942403] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:27:56,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381535458] [2021-12-18 21:27:56,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:56,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:27:56,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:27:56,423 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) [2021-12-18 21:27:56,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 21:27:56,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:56,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-18 21:27:56,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:27:56,633 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:27:56,639 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:27:56,640 INFO L388 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 11 treesize of output 11 [2021-12-18 21:27:56,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:27:56,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:27:56,742 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:27:56,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-12-18 21:27:56,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-18 21:27:56,849 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:27:56,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2021-12-18 21:27:56,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:27:56,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 21:27:56,918 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:27:56,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-12-18 21:27:56,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-18 21:27:57,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:27:57,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-18 21:27:57,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:27:57,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:27:57,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:57,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:27:57,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:27:57,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 103 [2021-12-18 21:27:57,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:27:57,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 79 [2021-12-18 21:27:57,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:27:57,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 684 treesize of output 615 [2021-12-18 21:27:57,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:27:57,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1701 treesize of output 1632 [2021-12-18 21:27:57,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1601 treesize of output 1537 [2021-12-18 21:27:57,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1537 treesize of output 1505 [2021-12-18 21:27:57,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1505 treesize of output 1441 [2021-12-18 21:27:57,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:27:57,888 INFO L388 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 1441 treesize of output 1342 [2021-12-18 21:27:57,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1333 treesize of output 1321 [2021-12-18 21:27:57,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1321 treesize of output 1315 [2021-12-18 21:27:57,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1315 treesize of output 1303 [2021-12-18 21:27:57,935 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-18 21:27:57,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-18 21:27:57,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-12-18 21:27:57,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914147495] [2021-12-18 21:27:57,935 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-18 21:27:57,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 21:27:57,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:27:57,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 21:27:57,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1176, Unknown=29, NotChecked=0, Total=1332 [2021-12-18 21:27:57,936 INFO L87 Difference]: Start difference. First operand 201 states and 227 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:58,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:27:58,383 INFO L93 Difference]: Finished difference Result 265 states and 297 transitions. [2021-12-18 21:27:58,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 21:27:58,385 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-18 21:27:58,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:27:58,385 INFO L225 Difference]: With dead ends: 265 [2021-12-18 21:27:58,385 INFO L226 Difference]: Without dead ends: 265 [2021-12-18 21:27:58,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=233, Invalid=2090, Unknown=29, NotChecked=0, Total=2352 [2021-12-18 21:27:58,387 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 166 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:27:58,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 412 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:27:58,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-12-18 21:27:58,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 200. [2021-12-18 21:27:58,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 175 states have (on average 1.2857142857142858) internal successors, (225), 199 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:58,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 225 transitions. [2021-12-18 21:27:58,390 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 225 transitions. Word has length 36 [2021-12-18 21:27:58,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:27:58,390 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 225 transitions. [2021-12-18 21:27:58,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:27:58,390 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 225 transitions. [2021-12-18 21:27:58,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-18 21:27:58,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:27:58,390 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-12-18 21:27:58,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 21:27:58,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:27:58,604 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:27:58,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:27:58,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1311673304, now seen corresponding path program 2 times [2021-12-18 21:27:58,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:27:58,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282528257] [2021-12-18 21:27:58,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:27:58,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:27:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:27:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:58,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:27:58,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282528257] [2021-12-18 21:27:58,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282528257] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:27:58,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897705888] [2021-12-18 21:27:58,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 21:27:58,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:27:58,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:27:58,908 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) [2021-12-18 21:27:58,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 21:27:59,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 21:27:59,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:27:59,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-18 21:27:59,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:27:59,063 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:27:59,122 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:27:59,122 INFO L388 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 11 treesize of output 11 [2021-12-18 21:27:59,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:27:59,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:27:59,228 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:27:59,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2021-12-18 21:27:59,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-18 21:27:59,309 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-18 21:27:59,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2021-12-18 21:27:59,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:27:59,321 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-18 21:27:59,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-12-18 21:27:59,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:27:59,365 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-18 21:27:59,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 70 [2021-12-18 21:27:59,371 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-12-18 21:27:59,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 55 [2021-12-18 21:27:59,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:27:59,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:27:59,669 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-12-18 21:27:59,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 42 [2021-12-18 21:27:59,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:27:59,675 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 21:27:59,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 19 [2021-12-18 21:27:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:27:59,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:28:06,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:28:06,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 620 treesize of output 476 [2021-12-18 21:28:06,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:28:06,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 476 treesize of output 340 [2021-12-18 21:28:07,771 INFO L354 Elim1Store]: treesize reduction 216, result has 65.8 percent of original size [2021-12-18 21:28:07,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 9300 treesize of output 8748 [2021-12-18 21:28:09,820 INFO L354 Elim1Store]: treesize reduction 430, result has 65.6 percent of original size [2021-12-18 21:28:09,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 16 new quantified variables, introduced 78 case distinctions, treesize of input 197720 treesize of output 170146 [2021-12-18 21:28:12,805 INFO L354 Elim1Store]: treesize reduction 44, result has 93.0 percent of original size [2021-12-18 21:28:12,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 13 new quantified variables, introduced 45 case distinctions, treesize of input 854032 treesize of output 776110 [2021-12-18 21:29:00,584 WARN L227 SmtUtils]: Spent 47.76s on a formula simplification. DAG size of input: 4520 DAG size of output: 4505 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 21:29:40,099 WARN L227 SmtUtils]: Spent 38.05s on a formula simplification. DAG size of input: 4472 DAG size of output: 4470 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 21:29:40,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:29:40,766 INFO L388 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 820811 treesize of output 806921 [2021-12-18 21:29:48,224 WARN L227 SmtUtils]: Spent 7.45s on a formula simplification. DAG size of input: 4751 DAG size of output: 4743 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 21:29:53,996 INFO L354 Elim1Store]: treesize reduction 64, result has 92.1 percent of original size [2021-12-18 21:29:54,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 850009 treesize of output 845217 [2021-12-18 21:30:08,994 WARN L227 SmtUtils]: Spent 14.99s on a formula simplification. DAG size of input: 5324 DAG size of output: 5279 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-18 21:30:15,119 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-18 21:30:15,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-18 21:30:15,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-12-18 21:30:15,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390641639] [2021-12-18 21:30:15,120 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-18 21:30:15,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 21:30:15,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:30:15,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 21:30:15,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1179, Unknown=39, NotChecked=0, Total=1332 [2021-12-18 21:30:15,122 INFO L87 Difference]: Start difference. First operand 200 states and 225 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:16,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:30:16,061 INFO L93 Difference]: Finished difference Result 224 states and 246 transitions. [2021-12-18 21:30:16,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 21:30:16,062 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-18 21:30:16,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:30:16,063 INFO L225 Difference]: With dead ends: 224 [2021-12-18 21:30:16,063 INFO L226 Difference]: Without dead ends: 224 [2021-12-18 21:30:16,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=232, Invalid=2485, Unknown=39, NotChecked=0, Total=2756 [2021-12-18 21:30:16,064 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 218 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:30:16,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 749 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 21:30:16,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-12-18 21:30:16,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 194. [2021-12-18 21:30:16,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 169 states have (on average 1.2781065088757397) internal successors, (216), 193 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 216 transitions. [2021-12-18 21:30:16,066 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 216 transitions. Word has length 37 [2021-12-18 21:30:16,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:30:16,066 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 216 transitions. [2021-12-18 21:30:16,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 216 transitions. [2021-12-18 21:30:16,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-18 21:30:16,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:30:16,067 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:30:16,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 21:30:16,275 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,SelfDestructingSolverStorable22 [2021-12-18 21:30:16,275 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:30:16,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:30:16,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1941772497, now seen corresponding path program 1 times [2021-12-18 21:30:16,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:30:16,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40952751] [2021-12-18 21:30:16,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:30:16,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:30:16,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:30:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:30:16,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:30:16,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40952751] [2021-12-18 21:30:16,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40952751] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:30:16,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060832958] [2021-12-18 21:30:16,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:30:16,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:30:16,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:30:16,354 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) [2021-12-18 21:30:16,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 21:30:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:30:16,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 21:30:16,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:30:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:30:16,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:30:16,610 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 21:30:16,611 INFO L388 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 12 treesize of output 11 [2021-12-18 21:30:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:30:16,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060832958] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:30:16,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 21:30:16,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2021-12-18 21:30:16,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901071048] [2021-12-18 21:30:16,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 21:30:16,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 21:30:16,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:30:16,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 21:30:16,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:30:16,642 INFO L87 Difference]: Start difference. First operand 194 states and 216 transitions. Second operand has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:16,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:30:16,811 INFO L93 Difference]: Finished difference Result 252 states and 279 transitions. [2021-12-18 21:30:16,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 21:30:16,812 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-18 21:30:16,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:30:16,813 INFO L225 Difference]: With dead ends: 252 [2021-12-18 21:30:16,813 INFO L226 Difference]: Without dead ends: 252 [2021-12-18 21:30:16,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-18 21:30:16,813 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 354 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 21:30:16,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 109 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 21:30:16,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-12-18 21:30:16,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 197. [2021-12-18 21:30:16,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 173 states have (on average 1.2890173410404624) internal successors, (223), 196 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:16,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 223 transitions. [2021-12-18 21:30:16,816 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 223 transitions. Word has length 38 [2021-12-18 21:30:16,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:30:16,816 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 223 transitions. [2021-12-18 21:30:16,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:16,816 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 223 transitions. [2021-12-18 21:30:16,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-18 21:30:16,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:30:16,816 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:30:16,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 21:30:17,027 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,SelfDestructingSolverStorable23 [2021-12-18 21:30:17,028 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:30:17,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:30:17,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1941772498, now seen corresponding path program 1 times [2021-12-18 21:30:17,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:30:17,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745458732] [2021-12-18 21:30:17,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:30:17,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:30:17,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:30:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:30:17,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:30:17,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745458732] [2021-12-18 21:30:17,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745458732] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:30:17,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873909850] [2021-12-18 21:30:17,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:30:17,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:30:17,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:30:17,152 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) [2021-12-18 21:30:17,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 21:30:17,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:30:17,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-18 21:30:17,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:30:17,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-18 21:30:17,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-18 21:30:17,643 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:30:17,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-18 21:30:17,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 21:30:17,670 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:30:17,670 INFO L388 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 11 treesize of output 11 [2021-12-18 21:30:17,708 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 21:30:17,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2021-12-18 21:30:17,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 21:30:17,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-12-18 21:30:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:30:18,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:30:18,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:30:18,209 INFO L388 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 15 treesize of output 19 [2021-12-18 21:30:18,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:30:18,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 45 [2021-12-18 21:30:18,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-18 21:30:22,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:30:22,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873909850] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 21:30:22,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 21:30:22,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 15] total 37 [2021-12-18 21:30:22,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124694921] [2021-12-18 21:30:22,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 21:30:22,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-18 21:30:22,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:30:22,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-18 21:30:22,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1244, Unknown=2, NotChecked=0, Total=1406 [2021-12-18 21:30:22,416 INFO L87 Difference]: Start difference. First operand 197 states and 223 transitions. Second operand has 38 states, 37 states have (on average 3.081081081081081) internal successors, (114), 38 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:23,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:30:23,735 INFO L93 Difference]: Finished difference Result 465 states and 521 transitions. [2021-12-18 21:30:23,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 21:30:23,740 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.081081081081081) internal successors, (114), 38 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-18 21:30:23,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:30:23,758 INFO L225 Difference]: With dead ends: 465 [2021-12-18 21:30:23,758 INFO L226 Difference]: Without dead ends: 465 [2021-12-18 21:30:23,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=735, Invalid=3295, Unknown=2, NotChecked=0, Total=4032 [2021-12-18 21:30:23,759 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 1585 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1585 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 3072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1821 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:30:23,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1585 Valid, 1151 Invalid, 3072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1123 Invalid, 0 Unknown, 1821 Unchecked, 0.5s Time] [2021-12-18 21:30:23,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-12-18 21:30:23,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 267. [2021-12-18 21:30:23,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 244 states have (on average 1.2745901639344261) internal successors, (311), 266 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:23,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 311 transitions. [2021-12-18 21:30:23,767 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 311 transitions. Word has length 38 [2021-12-18 21:30:23,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:30:23,767 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 311 transitions. [2021-12-18 21:30:23,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.081081081081081) internal successors, (114), 38 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:23,768 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 311 transitions. [2021-12-18 21:30:23,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-18 21:30:23,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:30:23,768 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1] [2021-12-18 21:30:23,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-18 21:30:23,985 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,SelfDestructingSolverStorable24 [2021-12-18 21:30:23,985 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:30:23,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:30:23,986 INFO L85 PathProgramCache]: Analyzing trace with hash 2099155488, now seen corresponding path program 3 times [2021-12-18 21:30:23,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 21:30:23,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550800153] [2021-12-18 21:30:23,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:30:23,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 21:30:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:30:24,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:30:24,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 21:30:24,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550800153] [2021-12-18 21:30:24,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550800153] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 21:30:24,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341252147] [2021-12-18 21:30:24,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 21:30:24,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 21:30:24,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:30:24,310 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) [2021-12-18 21:30:24,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 21:30:24,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-18 21:30:24,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 21:30:24,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-18 21:30:24,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:30:24,704 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-18 21:30:24,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2021-12-18 21:30:24,762 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-18 21:30:24,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 38 [2021-12-18 21:30:24,852 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-12-18 21:30:24,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-12-18 21:30:24,920 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-18 21:30:24,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 43 [2021-12-18 21:30:25,088 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-12-18 21:30:25,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 51 [2021-12-18 21:30:25,454 INFO L354 Elim1Store]: treesize reduction 76, result has 39.2 percent of original size [2021-12-18 21:30:25,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 132 treesize of output 142 [2021-12-18 21:30:25,466 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-12-18 21:30:25,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-18 21:30:25,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-12-18 21:30:25,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283523892] [2021-12-18 21:30:25,466 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-18 21:30:25,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 21:30:25,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 21:30:25,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 21:30:25,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=910, Unknown=3, NotChecked=0, Total=1056 [2021-12-18 21:30:25,468 INFO L87 Difference]: Start difference. First operand 267 states and 311 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:25,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-18 21:30:25,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=910, Unknown=3, NotChecked=0, Total=1056 [2021-12-18 21:30:25,468 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 21:30:25,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 21:30:25,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 21:30:25,669 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,SelfDestructingSolverStorable25 [2021-12-18 21:30:25,670 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@93a373c at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-18 21:30:25,673 INFO L158 Benchmark]: Toolchain (without parser) took 184963.30ms. Allocated memory was 113.2MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 82.8MB in the beginning and 937.3MB in the end (delta: -854.5MB). Peak memory consumption was 274.1MB. Max. memory is 16.1GB. [2021-12-18 21:30:25,673 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 83.9MB. Free memory is still 43.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 21:30:25,673 INFO L158 Benchmark]: CACSL2BoogieTranslator took 391.09ms. Allocated memory is still 113.2MB. Free memory was 82.8MB in the beginning and 80.1MB in the end (delta: 2.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-18 21:30:25,674 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.82ms. Allocated memory is still 113.2MB. Free memory was 80.1MB in the beginning and 78.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 21:30:25,674 INFO L158 Benchmark]: Boogie Preprocessor took 22.05ms. Allocated memory is still 113.2MB. Free memory was 78.0MB in the beginning and 76.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 21:30:25,674 INFO L158 Benchmark]: RCFGBuilder took 470.40ms. Allocated memory is still 113.2MB. Free memory was 76.0MB in the beginning and 54.6MB in the end (delta: 21.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-12-18 21:30:25,674 INFO L158 Benchmark]: TraceAbstraction took 184046.05ms. Allocated memory was 113.2MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 54.0MB in the beginning and 937.3MB in the end (delta: -883.2MB). Peak memory consumption was 247.5MB. Max. memory is 16.1GB. [2021-12-18 21:30:25,674 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 83.9MB. Free memory is still 43.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 391.09ms. Allocated memory is still 113.2MB. Free memory was 82.8MB in the beginning and 80.1MB in the end (delta: 2.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.82ms. Allocated memory is still 113.2MB. Free memory was 80.1MB in the beginning and 78.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.05ms. Allocated memory is still 113.2MB. Free memory was 78.0MB in the beginning and 76.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 470.40ms. Allocated memory is still 113.2MB. Free memory was 76.0MB in the beginning and 54.6MB in the end (delta: 21.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 184046.05ms. Allocated memory was 113.2MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 54.0MB in the beginning and 937.3MB in the end (delta: -883.2MB). Peak memory consumption was 247.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@93a373c de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@93a373c: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-18 21:30:25,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/forester-heap/dll-reverse.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 52fc70d7844651686a4c27e057f507f0498e7d5f7c17f07a035699d1630f6ea2 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 21:30:27,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 21:30:27,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 21:30:27,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 21:30:27,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 21:30:27,523 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 21:30:27,524 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 21:30:27,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 21:30:27,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 21:30:27,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 21:30:27,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 21:30:27,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 21:30:27,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 21:30:27,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 21:30:27,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 21:30:27,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 21:30:27,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 21:30:27,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 21:30:27,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 21:30:27,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 21:30:27,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 21:30:27,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 21:30:27,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 21:30:27,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 21:30:27,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 21:30:27,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 21:30:27,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 21:30:27,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 21:30:27,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 21:30:27,566 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 21:30:27,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 21:30:27,567 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 21:30:27,568 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 21:30:27,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 21:30:27,569 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 21:30:27,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 21:30:27,570 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 21:30:27,570 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 21:30:27,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 21:30:27,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 21:30:27,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 21:30:27,573 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-18 21:30:27,598 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 21:30:27,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 21:30:27,600 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 21:30:27,601 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 21:30:27,601 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 21:30:27,601 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 21:30:27,602 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 21:30:27,603 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 21:30:27,603 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 21:30:27,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 21:30:27,603 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 21:30:27,604 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 21:30:27,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 21:30:27,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 21:30:27,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 21:30:27,604 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 21:30:27,604 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 21:30:27,605 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 21:30:27,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 21:30:27,605 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 21:30:27,605 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-18 21:30:27,605 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-18 21:30:27,605 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 21:30:27,605 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 21:30:27,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 21:30:27,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 21:30:27,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 21:30:27,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:30:27,606 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 21:30:27,606 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 21:30:27,607 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-18 21:30:27,607 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-18 21:30:27,607 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 21:30:27,607 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-18 21:30:27,607 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52fc70d7844651686a4c27e057f507f0498e7d5f7c17f07a035699d1630f6ea2 [2021-12-18 21:30:27,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 21:30:27,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 21:30:27,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 21:30:27,909 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 21:30:27,910 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 21:30:27,911 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/dll-reverse.i [2021-12-18 21:30:27,957 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4708aa1e9/ccaa2f32f4ae42cb88cff6cef748e196/FLAG96d5912ee [2021-12-18 21:30:28,361 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 21:30:28,361 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i [2021-12-18 21:30:28,374 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4708aa1e9/ccaa2f32f4ae42cb88cff6cef748e196/FLAG96d5912ee [2021-12-18 21:30:28,384 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4708aa1e9/ccaa2f32f4ae42cb88cff6cef748e196 [2021-12-18 21:30:28,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 21:30:28,388 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 21:30:28,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 21:30:28,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 21:30:28,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 21:30:28,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:30:28" (1/1) ... [2021-12-18 21:30:28,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c032277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:30:28, skipping insertion in model container [2021-12-18 21:30:28,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:30:28" (1/1) ... [2021-12-18 21:30:28,399 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 21:30:28,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 21:30:28,638 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i[22309,22322] [2021-12-18 21:30:28,640 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i[22394,22407] [2021-12-18 21:30:28,644 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i[22924,22937] [2021-12-18 21:30:28,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:30:28,660 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 21:30:28,686 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i[22309,22322] [2021-12-18 21:30:28,686 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i[22394,22407] [2021-12-18 21:30:28,690 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i[22924,22937] [2021-12-18 21:30:28,692 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 21:30:28,717 INFO L208 MainTranslator]: Completed translation [2021-12-18 21:30:28,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:30:28 WrapperNode [2021-12-18 21:30:28,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 21:30:28,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 21:30:28,719 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 21:30:28,719 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 21:30:28,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:30:28" (1/1) ... [2021-12-18 21:30:28,735 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:30:28" (1/1) ... [2021-12-18 21:30:28,751 INFO L137 Inliner]: procedures = 122, calls = 41, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 141 [2021-12-18 21:30:28,751 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 21:30:28,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 21:30:28,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 21:30:28,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 21:30:28,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:30:28" (1/1) ... [2021-12-18 21:30:28,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:30:28" (1/1) ... [2021-12-18 21:30:28,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:30:28" (1/1) ... [2021-12-18 21:30:28,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:30:28" (1/1) ... [2021-12-18 21:30:28,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:30:28" (1/1) ... [2021-12-18 21:30:28,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:30:28" (1/1) ... [2021-12-18 21:30:28,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:30:28" (1/1) ... [2021-12-18 21:30:28,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 21:30:28,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 21:30:28,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 21:30:28,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 21:30:28,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:30:28" (1/1) ... [2021-12-18 21:30:28,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 21:30:28,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 21:30:28,798 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) [2021-12-18 21:30:28,814 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 [2021-12-18 21:30:28,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-18 21:30:28,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 21:30:28,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 21:30:28,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 21:30:28,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 21:30:28,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 21:30:28,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-18 21:30:28,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-18 21:30:28,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 21:30:28,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 21:30:28,958 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 21:30:28,959 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 21:30:29,422 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 21:30:29,427 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 21:30:29,427 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-12-18 21:30:29,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:30:29 BoogieIcfgContainer [2021-12-18 21:30:29,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 21:30:29,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 21:30:29,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 21:30:29,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 21:30:29,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 09:30:28" (1/3) ... [2021-12-18 21:30:29,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a413cf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:30:29, skipping insertion in model container [2021-12-18 21:30:29,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:30:28" (2/3) ... [2021-12-18 21:30:29,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a413cf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:30:29, skipping insertion in model container [2021-12-18 21:30:29,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:30:29" (3/3) ... [2021-12-18 21:30:29,436 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-reverse.i [2021-12-18 21:30:29,440 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 21:30:29,440 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 69 error locations. [2021-12-18 21:30:29,471 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 21:30:29,476 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 [2021-12-18 21:30:29,477 INFO L340 AbstractCegarLoop]: Starting to check reachability of 69 error locations. [2021-12-18 21:30:29,487 INFO L276 IsEmpty]: Start isEmpty. Operand has 146 states, 76 states have (on average 2.1973684210526314) internal successors, (167), 145 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:29,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-18 21:30:29,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:30:29,491 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-18 21:30:29,492 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:30:29,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:30:29,495 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-18 21:30:29,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:30:29,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543943585] [2021-12-18 21:30:29,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:30:29,503 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:30:29,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:30:29,505 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:30:29,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-18 21:30:29,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:30:29,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 21:30:29,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:30:29,609 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:30:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:30:29,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:30:29,617 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:30:29,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543943585] [2021-12-18 21:30:29,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543943585] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:30:29,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:30:29,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 21:30:29,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955649060] [2021-12-18 21:30:29,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:30:29,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 21:30:29,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:30:29,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 21:30:29,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 21:30:29,644 INFO L87 Difference]: Start difference. First operand has 146 states, 76 states have (on average 2.1973684210526314) internal successors, (167), 145 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:29,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:30:29,825 INFO L93 Difference]: Finished difference Result 143 states and 150 transitions. [2021-12-18 21:30:29,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 21:30:29,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-12-18 21:30:29,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:30:29,838 INFO L225 Difference]: With dead ends: 143 [2021-12-18 21:30:29,838 INFO L226 Difference]: Without dead ends: 141 [2021-12-18 21:30:29,840 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 [2021-12-18 21:30:29,844 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 96 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:30:29,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 124 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:30:29,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-18 21:30:29,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-12-18 21:30:29,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 75 states have (on average 1.9733333333333334) internal successors, (148), 140 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:29,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 148 transitions. [2021-12-18 21:30:29,871 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 148 transitions. Word has length 3 [2021-12-18 21:30:29,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:30:29,871 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 148 transitions. [2021-12-18 21:30:29,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:29,871 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 148 transitions. [2021-12-18 21:30:29,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-18 21:30:29,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:30:29,872 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-18 21:30:29,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-18 21:30:30,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:30:30,081 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:30:30,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:30:30,081 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-18 21:30:30,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:30:30,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1934541144] [2021-12-18 21:30:30,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:30:30,082 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:30:30,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:30:30,083 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:30:30,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-18 21:30:30,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:30:30,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 21:30:30,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:30:30,127 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:30:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:30:30,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:30:30,136 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:30:30,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1934541144] [2021-12-18 21:30:30,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1934541144] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:30:30,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:30:30,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 21:30:30,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96009747] [2021-12-18 21:30:30,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:30:30,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 21:30:30,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:30:30,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 21:30:30,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 21:30:30,153 INFO L87 Difference]: Start difference. First operand 141 states and 148 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:30,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:30:30,355 INFO L93 Difference]: Finished difference Result 138 states and 145 transitions. [2021-12-18 21:30:30,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 21:30:30,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-12-18 21:30:30,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:30:30,357 INFO L225 Difference]: With dead ends: 138 [2021-12-18 21:30:30,357 INFO L226 Difference]: Without dead ends: 138 [2021-12-18 21:30:30,357 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 [2021-12-18 21:30:30,358 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 93 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:30:30,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 120 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:30:30,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-18 21:30:30,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-12-18 21:30:30,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 75 states have (on average 1.9333333333333333) internal successors, (145), 137 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:30,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 145 transitions. [2021-12-18 21:30:30,366 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 145 transitions. Word has length 3 [2021-12-18 21:30:30,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:30:30,367 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 145 transitions. [2021-12-18 21:30:30,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:30,367 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 145 transitions. [2021-12-18 21:30:30,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 21:30:30,368 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:30:30,368 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:30:30,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-18 21:30:30,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:30:30,576 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:30:30,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:30:30,577 INFO L85 PathProgramCache]: Analyzing trace with hash 59261803, now seen corresponding path program 1 times [2021-12-18 21:30:30,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:30:30,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [545200838] [2021-12-18 21:30:30,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:30:30,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:30:30,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:30:30,590 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:30:30,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-18 21:30:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:30:30,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 21:30:30,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:30:30,659 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:30:30,696 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-18 21:30:30,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2021-12-18 21:30:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:30:30,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:30:30,706 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:30:30,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [545200838] [2021-12-18 21:30:30,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [545200838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:30:30,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:30:30,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 21:30:30,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279881455] [2021-12-18 21:30:30,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:30:30,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 21:30:30,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:30:30,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 21:30:30,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:30:30,708 INFO L87 Difference]: Start difference. First operand 138 states and 145 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:30,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:30:30,991 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2021-12-18 21:30:30,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 21:30:30,992 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-18 21:30:30,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:30:30,993 INFO L225 Difference]: With dead ends: 129 [2021-12-18 21:30:30,993 INFO L226 Difference]: Without dead ends: 129 [2021-12-18 21:30:30,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:30:30,994 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 161 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:30:30,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 86 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 21:30:30,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-18 21:30:30,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2021-12-18 21:30:30,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 79 states have (on average 1.7215189873417722) internal successors, (136), 124 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:30,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2021-12-18 21:30:30,999 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 8 [2021-12-18 21:30:30,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:30:30,999 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2021-12-18 21:30:31,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:31,000 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2021-12-18 21:30:31,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 21:30:31,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:30:31,000 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:30:31,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-18 21:30:31,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:30:31,214 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:30:31,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:30:31,214 INFO L85 PathProgramCache]: Analyzing trace with hash 59261804, now seen corresponding path program 1 times [2021-12-18 21:30:31,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:30:31,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4410692] [2021-12-18 21:30:31,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:30:31,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:30:31,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:30:31,216 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:30:31,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-18 21:30:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:30:31,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 21:30:31,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:30:31,308 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:30:31,390 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:30:31,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 21:30:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:30:31,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:30:31,401 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:30:31,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [4410692] [2021-12-18 21:30:31,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [4410692] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:30:31,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:30:31,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 21:30:31,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404382869] [2021-12-18 21:30:31,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:30:31,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 21:30:31,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:30:31,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 21:30:31,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:30:31,403 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:31,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:30:31,731 INFO L93 Difference]: Finished difference Result 170 states and 182 transitions. [2021-12-18 21:30:31,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 21:30:31,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-18 21:30:31,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:30:31,733 INFO L225 Difference]: With dead ends: 170 [2021-12-18 21:30:31,733 INFO L226 Difference]: Without dead ends: 170 [2021-12-18 21:30:31,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:30:31,733 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 165 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:30:31,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 129 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 21:30:31,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-18 21:30:31,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 151. [2021-12-18 21:30:31,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 105 states have (on average 1.6095238095238096) internal successors, (169), 150 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:31,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 169 transitions. [2021-12-18 21:30:31,747 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 169 transitions. Word has length 8 [2021-12-18 21:30:31,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:30:31,747 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 169 transitions. [2021-12-18 21:30:31,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:31,748 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 169 transitions. [2021-12-18 21:30:31,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 21:30:31,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:30:31,748 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:30:31,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-18 21:30:31,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:30:31,949 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:30:31,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:30:31,950 INFO L85 PathProgramCache]: Analyzing trace with hash 236809587, now seen corresponding path program 1 times [2021-12-18 21:30:31,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:30:31,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1408218302] [2021-12-18 21:30:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:30:31,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:30:31,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:30:31,956 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:30:31,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-18 21:30:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:30:32,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:30:32,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:30:32,076 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:30:32,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:30:32,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-12-18 21:30:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:30:32,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:30:32,130 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:30:32,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1408218302] [2021-12-18 21:30:32,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1408218302] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:30:32,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:30:32,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:30:32,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285031897] [2021-12-18 21:30:32,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:30:32,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:30:32,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:30:32,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:30:32,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:30:32,132 INFO L87 Difference]: Start difference. First operand 151 states and 169 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:32,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:30:32,516 INFO L93 Difference]: Finished difference Result 150 states and 167 transitions. [2021-12-18 21:30:32,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:30:32,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-18 21:30:32,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:30:32,517 INFO L225 Difference]: With dead ends: 150 [2021-12-18 21:30:32,517 INFO L226 Difference]: Without dead ends: 150 [2021-12-18 21:30:32,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:30:32,517 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 9 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:30:32,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 299 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 21:30:32,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-18 21:30:32,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-12-18 21:30:32,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 105 states have (on average 1.5904761904761904) internal successors, (167), 149 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:32,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 167 transitions. [2021-12-18 21:30:32,522 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 167 transitions. Word has length 11 [2021-12-18 21:30:32,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:30:32,522 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 167 transitions. [2021-12-18 21:30:32,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:32,522 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 167 transitions. [2021-12-18 21:30:32,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 21:30:32,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:30:32,522 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:30:32,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-18 21:30:32,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:30:32,730 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:30:32,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:30:32,730 INFO L85 PathProgramCache]: Analyzing trace with hash 236809588, now seen corresponding path program 1 times [2021-12-18 21:30:32,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:30:32,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172656210] [2021-12-18 21:30:32,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:30:32,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:30:32,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:30:32,731 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:30:32,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-18 21:30:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:30:32,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 21:30:32,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:30:32,807 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:30:32,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:30:32,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:30:32,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-18 21:30:32,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:30:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:30:32,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:30:32,860 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:30:32,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172656210] [2021-12-18 21:30:32,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172656210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:30:32,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:30:32,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:30:32,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809144362] [2021-12-18 21:30:32,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:30:32,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:30:32,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:30:32,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:30:32,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:30:32,862 INFO L87 Difference]: Start difference. First operand 150 states and 167 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:33,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:30:33,215 INFO L93 Difference]: Finished difference Result 149 states and 165 transitions. [2021-12-18 21:30:33,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:30:33,215 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-18 21:30:33,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:30:33,216 INFO L225 Difference]: With dead ends: 149 [2021-12-18 21:30:33,216 INFO L226 Difference]: Without dead ends: 149 [2021-12-18 21:30:33,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:30:33,217 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 4 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:30:33,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 281 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 21:30:33,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-18 21:30:33,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-12-18 21:30:33,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 105 states have (on average 1.5714285714285714) internal successors, (165), 148 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) [2021-12-18 21:30:33,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 165 transitions. [2021-12-18 21:30:33,221 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 165 transitions. Word has length 11 [2021-12-18 21:30:33,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:30:33,221 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 165 transitions. [2021-12-18 21:30:33,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:33,221 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 165 transitions. [2021-12-18 21:30:33,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-18 21:30:33,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:30:33,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:30:33,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-18 21:30:33,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:30:33,423 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:30:33,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:30:33,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1283125910, now seen corresponding path program 1 times [2021-12-18 21:30:33,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:30:33,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746393240] [2021-12-18 21:30:33,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:30:33,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:30:33,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:30:33,425 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:30:33,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-18 21:30:33,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:30:33,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 21:30:33,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:30:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:30:33,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:30:33,522 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:30:33,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746393240] [2021-12-18 21:30:33,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746393240] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:30:33,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:30:33,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:30:33,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338975467] [2021-12-18 21:30:33,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:30:33,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 21:30:33,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:30:33,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 21:30:33,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 21:30:33,523 INFO L87 Difference]: Start difference. First operand 149 states and 165 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:33,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:30:33,765 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2021-12-18 21:30:33,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 21:30:33,766 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-18 21:30:33,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:30:33,766 INFO L225 Difference]: With dead ends: 161 [2021-12-18 21:30:33,766 INFO L226 Difference]: Without dead ends: 161 [2021-12-18 21:30:33,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:30:33,767 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 150 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 21:30:33,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 182 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 21:30:33,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-18 21:30:33,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 149. [2021-12-18 21:30:33,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 105 states have (on average 1.542857142857143) internal successors, (162), 148 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:33,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 162 transitions. [2021-12-18 21:30:33,771 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 162 transitions. Word has length 12 [2021-12-18 21:30:33,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:30:33,771 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 162 transitions. [2021-12-18 21:30:33,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:33,771 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 162 transitions. [2021-12-18 21:30:33,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 21:30:33,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:30:33,771 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:30:33,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-18 21:30:33,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:30:33,978 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:30:33,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:30:33,978 INFO L85 PathProgramCache]: Analyzing trace with hash -356692446, now seen corresponding path program 1 times [2021-12-18 21:30:33,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:30:33,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209363638] [2021-12-18 21:30:33,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:30:33,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:30:33,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:30:33,989 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:30:33,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-18 21:30:34,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:30:34,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 21:30:34,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:30:34,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:30:34,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:30:34,100 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-18 21:30:34,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:30:34,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:30:34,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:30:34,138 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-18 21:30:34,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:30:34,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:30:34,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:30:34,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:30:34,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:30:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:30:34,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:30:34,211 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:30:34,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209363638] [2021-12-18 21:30:34,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209363638] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:30:34,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:30:34,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 21:30:34,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552253424] [2021-12-18 21:30:34,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:30:34,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:30:34,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:30:34,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:30:34,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:30:34,213 INFO L87 Difference]: Start difference. First operand 149 states and 162 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:34,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:30:34,550 INFO L93 Difference]: Finished difference Result 163 states and 177 transitions. [2021-12-18 21:30:34,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:30:34,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-12-18 21:30:34,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:30:34,551 INFO L225 Difference]: With dead ends: 163 [2021-12-18 21:30:34,551 INFO L226 Difference]: Without dead ends: 163 [2021-12-18 21:30:34,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:30:34,552 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 20 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:30:34,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 338 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 21:30:34,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-18 21:30:34,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 152. [2021-12-18 21:30:34,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 108 states have (on average 1.5277777777777777) internal successors, (165), 151 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) [2021-12-18 21:30:34,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 165 transitions. [2021-12-18 21:30:34,555 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 165 transitions. Word has length 15 [2021-12-18 21:30:34,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:30:34,555 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 165 transitions. [2021-12-18 21:30:34,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:34,555 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 165 transitions. [2021-12-18 21:30:34,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 21:30:34,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:30:34,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:30:34,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-18 21:30:34,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:30:34,763 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:30:34,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:30:34,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1108053835, now seen corresponding path program 1 times [2021-12-18 21:30:34,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:30:34,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [624077418] [2021-12-18 21:30:34,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:30:34,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:30:34,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:30:34,766 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:30:34,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-18 21:30:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:30:34,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 21:30:34,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:30:34,876 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-18 21:30:34,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 21 [2021-12-18 21:30:34,967 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-12-18 21:30:34,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 47 [2021-12-18 21:30:35,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:30:35,152 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:30:35,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 48 [2021-12-18 21:30:35,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2021-12-18 21:30:35,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:30:35,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:30:35,290 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:30:35,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [624077418] [2021-12-18 21:30:35,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [624077418] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:30:35,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:30:35,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 21:30:35,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895333050] [2021-12-18 21:30:35,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:30:35,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 21:30:35,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:30:35,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 21:30:35,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:30:35,291 INFO L87 Difference]: Start difference. First operand 152 states and 165 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:35,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:30:35,924 INFO L93 Difference]: Finished difference Result 238 states and 257 transitions. [2021-12-18 21:30:35,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 21:30:35,924 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-12-18 21:30:35,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:30:35,925 INFO L225 Difference]: With dead ends: 238 [2021-12-18 21:30:35,925 INFO L226 Difference]: Without dead ends: 238 [2021-12-18 21:30:35,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-12-18 21:30:35,926 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 203 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 21:30:35,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 339 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 255 Invalid, 0 Unknown, 181 Unchecked, 0.4s Time] [2021-12-18 21:30:35,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-18 21:30:35,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 154. [2021-12-18 21:30:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 110 states have (on average 1.5272727272727273) internal successors, (168), 153 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:35,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 168 transitions. [2021-12-18 21:30:35,930 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 168 transitions. Word has length 15 [2021-12-18 21:30:35,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:30:35,930 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 168 transitions. [2021-12-18 21:30:35,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:35,930 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 168 transitions. [2021-12-18 21:30:35,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 21:30:35,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:30:35,931 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:30:35,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-18 21:30:36,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:30:36,140 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:30:36,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:30:36,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1108053834, now seen corresponding path program 1 times [2021-12-18 21:30:36,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:30:36,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2068946301] [2021-12-18 21:30:36,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:30:36,141 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:30:36,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:30:36,142 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:30:36,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-18 21:30:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:30:36,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-18 21:30:36,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:30:36,243 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:30:36,268 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:30:36,278 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:30:36,279 INFO L388 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 14 treesize of output 14 [2021-12-18 21:30:36,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:30:36,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:30:36,377 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:30:36,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-12-18 21:30:36,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-18 21:30:36,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:30:36,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-18 21:30:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:30:36,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:30:36,432 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:30:36,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2068946301] [2021-12-18 21:30:36,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2068946301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:30:36,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:30:36,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 21:30:36,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947826021] [2021-12-18 21:30:36,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:30:36,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 21:30:36,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:30:36,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 21:30:36,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:30:36,433 INFO L87 Difference]: Start difference. First operand 154 states and 168 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:37,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:30:37,229 INFO L93 Difference]: Finished difference Result 150 states and 162 transitions. [2021-12-18 21:30:37,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 21:30:37,230 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-12-18 21:30:37,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:30:37,230 INFO L225 Difference]: With dead ends: 150 [2021-12-18 21:30:37,230 INFO L226 Difference]: Without dead ends: 150 [2021-12-18 21:30:37,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-12-18 21:30:37,231 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 151 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 21:30:37,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 237 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 21:30:37,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-18 21:30:37,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-12-18 21:30:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 110 states have (on average 1.4727272727272727) internal successors, (162), 148 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:37,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 162 transitions. [2021-12-18 21:30:37,234 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 162 transitions. Word has length 15 [2021-12-18 21:30:37,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:30:37,234 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 162 transitions. [2021-12-18 21:30:37,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:37,234 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 162 transitions. [2021-12-18 21:30:37,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 21:30:37,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:30:37,234 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:30:37,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-18 21:30:37,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:30:37,443 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:30:37,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:30:37,443 INFO L85 PathProgramCache]: Analyzing trace with hash -2134365480, now seen corresponding path program 1 times [2021-12-18 21:30:37,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:30:37,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911674961] [2021-12-18 21:30:37,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:30:37,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:30:37,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:30:37,456 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:30:37,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-18 21:30:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:30:37,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 21:30:37,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:30:37,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:30:37,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:30:37,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:30:37,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:30:37,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:30:37,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:30:37,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:30:37,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:30:37,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:30:37,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:30:37,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:30:37,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:30:37,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 21:30:37,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-18 21:30:37,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:30:37,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:30:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:30:37,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:30:37,745 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:30:37,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911674961] [2021-12-18 21:30:37,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911674961] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:30:37,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:30:37,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 21:30:37,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668270991] [2021-12-18 21:30:37,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:30:37,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 21:30:37,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:30:37,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 21:30:37,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-18 21:30:37,747 INFO L87 Difference]: Start difference. First operand 149 states and 162 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:38,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:30:38,056 INFO L93 Difference]: Finished difference Result 159 states and 172 transitions. [2021-12-18 21:30:38,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:30:38,056 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-12-18 21:30:38,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:30:38,057 INFO L225 Difference]: With dead ends: 159 [2021-12-18 21:30:38,057 INFO L226 Difference]: Without dead ends: 159 [2021-12-18 21:30:38,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-18 21:30:38,057 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 95 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:30:38,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 353 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 21:30:38,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-18 21:30:38,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 154. [2021-12-18 21:30:38,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 115 states have (on average 1.4521739130434783) internal successors, (167), 153 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:38,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 167 transitions. [2021-12-18 21:30:38,060 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 167 transitions. Word has length 17 [2021-12-18 21:30:38,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:30:38,060 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 167 transitions. [2021-12-18 21:30:38,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:38,060 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 167 transitions. [2021-12-18 21:30:38,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-18 21:30:38,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:30:38,060 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:30:38,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-18 21:30:38,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:30:38,267 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:30:38,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:30:38,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1847195620, now seen corresponding path program 1 times [2021-12-18 21:30:38,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:30:38,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [182281723] [2021-12-18 21:30:38,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:30:38,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:30:38,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:30:38,276 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:30:38,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-18 21:30:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:30:38,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 21:30:38,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:30:38,396 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:30:38,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:30:38,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-12-18 21:30:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:30:38,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:30:38,420 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:30:38,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [182281723] [2021-12-18 21:30:38,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [182281723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:30:38,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:30:38,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:30:38,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592080583] [2021-12-18 21:30:38,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:30:38,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:30:38,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:30:38,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:30:38,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:30:38,421 INFO L87 Difference]: Start difference. First operand 154 states and 167 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:38,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:30:38,766 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2021-12-18 21:30:38,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 21:30:38,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-12-18 21:30:38,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:30:38,768 INFO L225 Difference]: With dead ends: 153 [2021-12-18 21:30:38,768 INFO L226 Difference]: Without dead ends: 153 [2021-12-18 21:30:38,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:30:38,768 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 9 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:30:38,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 279 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 21:30:38,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-18 21:30:38,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-12-18 21:30:38,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 115 states have (on average 1.434782608695652) internal successors, (165), 152 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) [2021-12-18 21:30:38,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 165 transitions. [2021-12-18 21:30:38,771 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 165 transitions. Word has length 19 [2021-12-18 21:30:38,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:30:38,771 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 165 transitions. [2021-12-18 21:30:38,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:38,771 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 165 transitions. [2021-12-18 21:30:38,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-18 21:30:38,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:30:38,772 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 21:30:38,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-18 21:30:38,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:30:38,973 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:30:38,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:30:38,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1847195621, now seen corresponding path program 1 times [2021-12-18 21:30:38,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:30:38,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041715179] [2021-12-18 21:30:38,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:30:38,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:30:38,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:30:38,975 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:30:38,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-18 21:30:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:30:39,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 21:30:39,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:30:39,091 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:30:39,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:30:39,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:30:39,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 21:30:39,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-18 21:30:39,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:30:39,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:30:39,142 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:30:39,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041715179] [2021-12-18 21:30:39,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041715179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:30:39,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:30:39,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 21:30:39,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447889850] [2021-12-18 21:30:39,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:30:39,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 21:30:39,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:30:39,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 21:30:39,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 21:30:39,143 INFO L87 Difference]: Start difference. First operand 153 states and 165 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:39,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:30:39,479 INFO L93 Difference]: Finished difference Result 152 states and 163 transitions. [2021-12-18 21:30:39,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 21:30:39,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-12-18 21:30:39,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:30:39,480 INFO L225 Difference]: With dead ends: 152 [2021-12-18 21:30:39,480 INFO L226 Difference]: Without dead ends: 152 [2021-12-18 21:30:39,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-18 21:30:39,480 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 4 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 21:30:39,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 271 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 21:30:39,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-18 21:30:39,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-12-18 21:30:39,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 115 states have (on average 1.4173913043478261) internal successors, (163), 151 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:39,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 163 transitions. [2021-12-18 21:30:39,490 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 163 transitions. Word has length 19 [2021-12-18 21:30:39,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:30:39,490 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 163 transitions. [2021-12-18 21:30:39,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:39,490 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 163 transitions. [2021-12-18 21:30:39,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-18 21:30:39,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:30:39,491 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, 1, 1] [2021-12-18 21:30:39,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-18 21:30:39,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:30:39,698 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:30:39,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:30:39,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1593684134, now seen corresponding path program 1 times [2021-12-18 21:30:39,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:30:39,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697580629] [2021-12-18 21:30:39,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:30:39,699 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:30:39,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:30:39,700 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:30:39,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-18 21:30:39,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:30:39,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-18 21:30:39,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:30:39,827 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-18 21:30:39,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 21 [2021-12-18 21:30:39,944 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-12-18 21:30:39,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 47 [2021-12-18 21:30:39,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:30:40,111 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:30:40,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 48 [2021-12-18 21:30:40,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2021-12-18 21:30:40,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:30:40,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:30:40,258 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:30:40,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697580629] [2021-12-18 21:30:40,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697580629] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:30:40,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:30:40,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 21:30:40,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866283829] [2021-12-18 21:30:40,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:30:40,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 21:30:40,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:30:40,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 21:30:40,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-18 21:30:40,260 INFO L87 Difference]: Start difference. First operand 152 states and 163 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:41,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:30:41,162 INFO L93 Difference]: Finished difference Result 207 states and 222 transitions. [2021-12-18 21:30:41,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 21:30:41,162 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-18 21:30:41,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:30:41,163 INFO L225 Difference]: With dead ends: 207 [2021-12-18 21:30:41,163 INFO L226 Difference]: Without dead ends: 207 [2021-12-18 21:30:41,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-12-18 21:30:41,164 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 225 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 21:30:41,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 487 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 567 Invalid, 0 Unknown, 182 Unchecked, 0.6s Time] [2021-12-18 21:30:41,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-18 21:30:41,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 147. [2021-12-18 21:30:41,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 113 states have (on average 1.3982300884955752) internal successors, (158), 146 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:41,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 158 transitions. [2021-12-18 21:30:41,166 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 158 transitions. Word has length 23 [2021-12-18 21:30:41,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:30:41,166 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 158 transitions. [2021-12-18 21:30:41,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:41,166 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 158 transitions. [2021-12-18 21:30:41,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-18 21:30:41,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:30:41,167 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, 1, 1] [2021-12-18 21:30:41,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-18 21:30:41,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:30:41,377 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:30:41,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:30:41,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1593684135, now seen corresponding path program 1 times [2021-12-18 21:30:41,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:30:41,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163392083] [2021-12-18 21:30:41,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:30:41,377 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:30:41,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:30:41,388 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:30:41,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-18 21:30:41,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:30:41,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-18 21:30:41,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:30:41,508 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:30:41,550 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 21:30:41,550 INFO L388 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 14 treesize of output 14 [2021-12-18 21:30:41,555 INFO L388 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 6 treesize of output 5 [2021-12-18 21:30:41,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:30:41,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:30:41,657 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:30:41,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-12-18 21:30:41,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-18 21:30:41,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-18 21:30:41,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2021-12-18 21:30:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:30:41,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 21:30:41,710 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-18 21:30:41,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163392083] [2021-12-18 21:30:41,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163392083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 21:30:41,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 21:30:41,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 21:30:41,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552386759] [2021-12-18 21:30:41,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 21:30:41,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 21:30:41,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-18 21:30:41,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 21:30:41,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-18 21:30:41,711 INFO L87 Difference]: Start difference. First operand 147 states and 158 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:42,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 21:30:42,356 INFO L93 Difference]: Finished difference Result 147 states and 157 transitions. [2021-12-18 21:30:42,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 21:30:42,357 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-18 21:30:42,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 21:30:42,357 INFO L225 Difference]: With dead ends: 147 [2021-12-18 21:30:42,357 INFO L226 Difference]: Without dead ends: 147 [2021-12-18 21:30:42,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-12-18 21:30:42,358 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 123 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 21:30:42,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 215 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 21:30:42,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-18 21:30:42,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2021-12-18 21:30:42,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 113 states have (on average 1.3805309734513274) internal successors, (156), 144 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:42,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 156 transitions. [2021-12-18 21:30:42,360 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 156 transitions. Word has length 23 [2021-12-18 21:30:42,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 21:30:42,361 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 156 transitions. [2021-12-18 21:30:42,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 21:30:42,361 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 156 transitions. [2021-12-18 21:30:42,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 21:30:42,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 21:30:42,361 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, 1, 1, 1, 1] [2021-12-18 21:30:42,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-18 21:30:42,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-18 21:30:42,572 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 65 more)] === [2021-12-18 21:30:42,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 21:30:42,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1672552343, now seen corresponding path program 1 times [2021-12-18 21:30:42,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-18 21:30:42,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212565767] [2021-12-18 21:30:42,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 21:30:42,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-18 21:30:42,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-18 21:30:42,574 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-18 21:30:42,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-18 21:30:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 21:30:42,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-18 21:30:42,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 21:30:42,718 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 21:30:42,790 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-18 21:30:42,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-18 21:30:42,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 21:30:42,915 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:30:42,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2021-12-18 21:30:42,997 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:30:42,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 32 [2021-12-18 21:30:43,018 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-18 21:30:43,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2021-12-18 21:30:43,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-18 21:30:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 21:30:43,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 21:30:43,263 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_515 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_515) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (_ bv1 1)))) is different from false [2021-12-18 21:30:43,301 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_515 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem5#1.base| v_ArrVal_515) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (_ bv1 1)))) is different from false [2021-12-18 21:30:43,371 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_513 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_515 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_513))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_515)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (_ bv1 1)))) is different from false [2021-12-18 21:30:43,380 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_513 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_515 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_513))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_515)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (_ bv1 1)))) is different from false [2021-12-18 21:30:43,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:30:43,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2021-12-18 21:30:43,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:30:43,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 139 [2021-12-18 21:30:43,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 21:30:43,418 INFO L388 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 124 treesize of output 122 [2021-12-18 21:30:43,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 110 Killed by 15