./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.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 f22afdea3888c472e42c0b4bee511704d4ceb9c1e2d9f4db0ce5ffbd6de758f0 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 19:32:36,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 19:32:36,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 19:32:36,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 19:32:36,550 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 19:32:36,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 19:32:36,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 19:32:36,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 19:32:36,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 19:32:36,554 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 19:32:36,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 19:32:36,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 19:32:36,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 19:32:36,556 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 19:32:36,557 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 19:32:36,558 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 19:32:36,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 19:32:36,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 19:32:36,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 19:32:36,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 19:32:36,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 19:32:36,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 19:32:36,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 19:32:36,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 19:32:36,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 19:32:36,571 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 19:32:36,571 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 19:32:36,572 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 19:32:36,572 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 19:32:36,573 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 19:32:36,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 19:32:36,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 19:32:36,574 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 19:32:36,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 19:32:36,575 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 19:32:36,576 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 19:32:36,576 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 19:32:36,576 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 19:32:36,577 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 19:32:36,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 19:32:36,578 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 19:32:36,583 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-14 19:32:36,603 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 19:32:36,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 19:32:36,606 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 19:32:36,607 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 19:32:36,608 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 19:32:36,608 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 19:32:36,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 19:32:36,608 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 19:32:36,609 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 19:32:36,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 19:32:36,609 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 19:32:36,609 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 19:32:36,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 19:32:36,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 19:32:36,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 19:32:36,610 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-14 19:32:36,610 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-14 19:32:36,610 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-14 19:32:36,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 19:32:36,610 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 19:32:36,610 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 19:32:36,611 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 19:32:36,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 19:32:36,611 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 19:32:36,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 19:32:36,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:32:36,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 19:32:36,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 19:32:36,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 19:32:36,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 19:32:36,612 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 19:32:36,612 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f22afdea3888c472e42c0b4bee511704d4ceb9c1e2d9f4db0ce5ffbd6de758f0 [2021-12-14 19:32:36,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 19:32:36,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 19:32:36,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 19:32:36,806 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 19:32:36,806 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 19:32:36,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i [2021-12-14 19:32:36,859 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef1dd7555/1bfc6ce86b6142aca55a34ee50233e31/FLAG87ca0dfc0 [2021-12-14 19:32:37,265 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 19:32:37,271 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i [2021-12-14 19:32:37,279 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef1dd7555/1bfc6ce86b6142aca55a34ee50233e31/FLAG87ca0dfc0 [2021-12-14 19:32:37,287 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef1dd7555/1bfc6ce86b6142aca55a34ee50233e31 [2021-12-14 19:32:37,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 19:32:37,290 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 19:32:37,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 19:32:37,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 19:32:37,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 19:32:37,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:32:37" (1/1) ... [2021-12-14 19:32:37,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15d18229 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:37, skipping insertion in model container [2021-12-14 19:32:37,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:32:37" (1/1) ... [2021-12-14 19:32:37,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 19:32:37,336 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:32:37,496 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:32:37,501 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 19:32:37,525 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:32:37,547 INFO L208 MainTranslator]: Completed translation [2021-12-14 19:32:37,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:37 WrapperNode [2021-12-14 19:32:37,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 19:32:37,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 19:32:37,548 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 19:32:37,548 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 19:32:37,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:37" (1/1) ... [2021-12-14 19:32:37,569 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:37" (1/1) ... [2021-12-14 19:32:37,587 INFO L137 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-12-14 19:32:37,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 19:32:37,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 19:32:37,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 19:32:37,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 19:32:37,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:37" (1/1) ... [2021-12-14 19:32:37,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:37" (1/1) ... [2021-12-14 19:32:37,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:37" (1/1) ... [2021-12-14 19:32:37,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:37" (1/1) ... [2021-12-14 19:32:37,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:37" (1/1) ... [2021-12-14 19:32:37,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:37" (1/1) ... [2021-12-14 19:32:37,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:37" (1/1) ... [2021-12-14 19:32:37,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 19:32:37,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 19:32:37,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 19:32:37,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 19:32:37,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:37" (1/1) ... [2021-12-14 19:32:37,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:32:37,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:37,640 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) [2021-12-14 19:32:37,647 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 [2021-12-14 19:32:37,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 19:32:37,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 19:32:37,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 19:32:37,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 19:32:37,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 19:32:37,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 19:32:37,770 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 19:32:37,771 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 19:32:37,890 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 19:32:37,894 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 19:32:37,894 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 19:32:37,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:32:37 BoogieIcfgContainer [2021-12-14 19:32:37,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 19:32:37,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 19:32:37,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 19:32:37,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 19:32:37,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:32:37" (1/3) ... [2021-12-14 19:32:37,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50a892a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:32:37, skipping insertion in model container [2021-12-14 19:32:37,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:32:37" (2/3) ... [2021-12-14 19:32:37,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50a892a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:32:37, skipping insertion in model container [2021-12-14 19:32:37,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:32:37" (3/3) ... [2021-12-14 19:32:37,901 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstpcpy-alloca-1.i [2021-12-14 19:32:37,905 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 19:32:37,908 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-12-14 19:32:37,936 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 19:32:37,940 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 [2021-12-14 19:32:37,941 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-12-14 19:32:37,950 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:37,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-14 19:32:37,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:37,955 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-14 19:32:37,956 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:37,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:37,960 INFO L85 PathProgramCache]: Analyzing trace with hash 889510840, now seen corresponding path program 1 times [2021-12-14 19:32:37,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:37,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322529956] [2021-12-14 19:32:37,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:37,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:38,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:38,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322529956] [2021-12-14 19:32:38,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322529956] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:38,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:38,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:32:38,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815298757] [2021-12-14 19:32:38,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:38,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:32:38,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:38,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:32:38,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:32:38,104 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:38,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:38,148 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-12-14 19:32:38,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:32:38,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-12-14 19:32:38,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:38,155 INFO L225 Difference]: With dead ends: 34 [2021-12-14 19:32:38,156 INFO L226 Difference]: Without dead ends: 30 [2021-12-14 19:32:38,158 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 [2021-12-14 19:32:38,163 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 56 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:38,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 35 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:38,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-14 19:32:38,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-12-14 19:32:38,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:38,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-14 19:32:38,187 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 6 [2021-12-14 19:32:38,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:38,187 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-14 19:32:38,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:38,188 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-14 19:32:38,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-14 19:32:38,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:38,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-14 19:32:38,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 19:32:38,189 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:38,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:38,191 INFO L85 PathProgramCache]: Analyzing trace with hash 889512762, now seen corresponding path program 1 times [2021-12-14 19:32:38,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:38,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486444454] [2021-12-14 19:32:38,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:38,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:38,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:38,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:38,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486444454] [2021-12-14 19:32:38,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486444454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:38,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:38,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:32:38,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741953994] [2021-12-14 19:32:38,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:38,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:32:38,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:38,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:32:38,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:32:38,235 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:38,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:38,255 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-12-14 19:32:38,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:32:38,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-12-14 19:32:38,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:38,258 INFO L225 Difference]: With dead ends: 29 [2021-12-14 19:32:38,258 INFO L226 Difference]: Without dead ends: 28 [2021-12-14 19:32:38,259 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 [2021-12-14 19:32:38,262 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:38,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 43 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:38,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-14 19:32:38,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-12-14 19:32:38,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:38,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-12-14 19:32:38,277 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 6 [2021-12-14 19:32:38,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:38,278 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-12-14 19:32:38,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:38,278 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-12-14 19:32:38,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-14 19:32:38,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:38,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:38,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 19:32:38,280 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:38,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:38,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033015, now seen corresponding path program 1 times [2021-12-14 19:32:38,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:38,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516867044] [2021-12-14 19:32:38,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:38,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:38,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:38,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516867044] [2021-12-14 19:32:38,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516867044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:38,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:38,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:32:38,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537113785] [2021-12-14 19:32:38,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:38,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:32:38,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:38,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:32:38,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:32:38,362 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:38,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:38,388 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2021-12-14 19:32:38,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:32:38,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-14 19:32:38,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:38,389 INFO L225 Difference]: With dead ends: 33 [2021-12-14 19:32:38,389 INFO L226 Difference]: Without dead ends: 33 [2021-12-14 19:32:38,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:32:38,390 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 34 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:38,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 41 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:38,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-14 19:32:38,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-12-14 19:32:38,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.631578947368421) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:38,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-12-14 19:32:38,396 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 7 [2021-12-14 19:32:38,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:38,397 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-12-14 19:32:38,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:38,397 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-12-14 19:32:38,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-14 19:32:38,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:38,397 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:38,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 19:32:38,398 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:38,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:38,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033068, now seen corresponding path program 1 times [2021-12-14 19:32:38,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:38,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748836556] [2021-12-14 19:32:38,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:38,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:38,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:38,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748836556] [2021-12-14 19:32:38,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748836556] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:38,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:38,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:32:38,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751895938] [2021-12-14 19:32:38,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:38,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:32:38,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:38,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:32:38,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:32:38,450 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:38,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:38,470 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-12-14 19:32:38,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:32:38,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-14 19:32:38,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:38,472 INFO L225 Difference]: With dead ends: 26 [2021-12-14 19:32:38,472 INFO L226 Difference]: Without dead ends: 26 [2021-12-14 19:32:38,472 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 [2021-12-14 19:32:38,477 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:38,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 22 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:38,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-14 19:32:38,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-14 19:32:38,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:38,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-12-14 19:32:38,486 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 7 [2021-12-14 19:32:38,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:38,486 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-12-14 19:32:38,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:38,487 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-12-14 19:32:38,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-14 19:32:38,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:38,487 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:38,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 19:32:38,487 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:38,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:38,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033069, now seen corresponding path program 1 times [2021-12-14 19:32:38,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:38,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099924896] [2021-12-14 19:32:38,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:38,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:38,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:38,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099924896] [2021-12-14 19:32:38,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099924896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:38,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:38,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:32:38,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444805940] [2021-12-14 19:32:38,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:38,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:32:38,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:38,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:32:38,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:32:38,567 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:38,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:38,630 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-12-14 19:32:38,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:32:38,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-14 19:32:38,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:38,633 INFO L225 Difference]: With dead ends: 29 [2021-12-14 19:32:38,633 INFO L226 Difference]: Without dead ends: 29 [2021-12-14 19:32:38,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:32:38,634 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:38,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 47 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:32:38,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-14 19:32:38,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-12-14 19:32:38,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.5) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:38,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-12-14 19:32:38,640 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 7 [2021-12-14 19:32:38,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:38,641 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-12-14 19:32:38,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:38,641 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-12-14 19:32:38,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 19:32:38,644 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:38,644 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:38,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 19:32:38,644 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:38,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:38,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1762264955, now seen corresponding path program 1 times [2021-12-14 19:32:38,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:38,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454495525] [2021-12-14 19:32:38,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:38,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:38,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:38,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:38,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454495525] [2021-12-14 19:32:38,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454495525] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:38,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022240607] [2021-12-14 19:32:38,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:38,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:38,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:38,728 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) [2021-12-14 19:32:38,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 19:32:38,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:38,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 19:32:38,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:38,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:38,946 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 22 treesize of output 18 [2021-12-14 19:32:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:39,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022240607] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:39,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:39,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-12-14 19:32:39,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894829893] [2021-12-14 19:32:39,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:39,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 19:32:39,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:39,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 19:32:39,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:32:39,018 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:39,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:39,118 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-12-14 19:32:39,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:32:39,119 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-14 19:32:39,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:39,120 INFO L225 Difference]: With dead ends: 48 [2021-12-14 19:32:39,120 INFO L226 Difference]: Without dead ends: 48 [2021-12-14 19:32:39,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-14 19:32:39,123 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 65 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:39,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 98 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:32:39,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-14 19:32:39,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2021-12-14 19:32:39,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:39,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-12-14 19:32:39,129 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 11 [2021-12-14 19:32:39,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:39,129 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-12-14 19:32:39,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:39,129 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-12-14 19:32:39,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 19:32:39,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:39,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:39,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 19:32:39,343 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,SelfDestructingSolverStorable5 [2021-12-14 19:32:39,344 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:39,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:39,344 INFO L85 PathProgramCache]: Analyzing trace with hash 952918329, now seen corresponding path program 1 times [2021-12-14 19:32:39,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:39,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041488863] [2021-12-14 19:32:39,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:39,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:39,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:39,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:39,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041488863] [2021-12-14 19:32:39,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041488863] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:39,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092386893] [2021-12-14 19:32:39,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:39,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:39,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:39,425 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) [2021-12-14 19:32:39,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 19:32:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:39,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 19:32:39,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:39,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:39,633 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 22 treesize of output 18 [2021-12-14 19:32:39,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:39,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092386893] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:39,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:39,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-12-14 19:32:39,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484679488] [2021-12-14 19:32:39,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:39,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 19:32:39,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:39,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 19:32:39,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-14 19:32:39,704 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 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) [2021-12-14 19:32:39,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:39,846 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2021-12-14 19:32:39,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 19:32:39,848 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 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 11 [2021-12-14 19:32:39,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:39,849 INFO L225 Difference]: With dead ends: 76 [2021-12-14 19:32:39,849 INFO L226 Difference]: Without dead ends: 76 [2021-12-14 19:32:39,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-12-14 19:32:39,850 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 191 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:39,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 102 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:32:39,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-14 19:32:39,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 35. [2021-12-14 19:32:39,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 34 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) [2021-12-14 19:32:39,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-12-14 19:32:39,852 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 11 [2021-12-14 19:32:39,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:39,853 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-12-14 19:32:39,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 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) [2021-12-14 19:32:39,853 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-12-14 19:32:39,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 19:32:39,853 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:39,853 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:39,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-14 19:32:40,059 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,SelfDestructingSolverStorable6 [2021-12-14 19:32:40,060 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:40,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:40,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1632976699, now seen corresponding path program 1 times [2021-12-14 19:32:40,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:40,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129577704] [2021-12-14 19:32:40,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:40,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:40,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:40,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129577704] [2021-12-14 19:32:40,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129577704] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:40,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:40,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 19:32:40,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661458687] [2021-12-14 19:32:40,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:40,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 19:32:40,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:40,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 19:32:40,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:32:40,146 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 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) [2021-12-14 19:32:40,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:40,186 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-12-14 19:32:40,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:32:40,187 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 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 [2021-12-14 19:32:40,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:40,187 INFO L225 Difference]: With dead ends: 34 [2021-12-14 19:32:40,187 INFO L226 Difference]: Without dead ends: 34 [2021-12-14 19:32:40,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:32:40,188 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:40,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 32 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:40,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-14 19:32:40,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-12-14 19:32:40,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:40,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-12-14 19:32:40,189 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2021-12-14 19:32:40,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:40,190 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-12-14 19:32:40,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 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) [2021-12-14 19:32:40,190 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-12-14 19:32:40,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 19:32:40,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:40,190 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:40,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 19:32:40,190 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:40,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:40,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1632976752, now seen corresponding path program 1 times [2021-12-14 19:32:40,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:40,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905075235] [2021-12-14 19:32:40,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:40,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:40,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:40,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:40,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905075235] [2021-12-14 19:32:40,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905075235] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:40,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135695820] [2021-12-14 19:32:40,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:40,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:40,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:40,238 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) [2021-12-14 19:32:40,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 19:32:40,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:40,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 19:32:40,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:40,322 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:32:40,323 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:32:40,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:40,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:40,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135695820] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:40,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:40,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-14 19:32:40,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576644405] [2021-12-14 19:32:40,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:40,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 19:32:40,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:40,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 19:32:40,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:32:40,479 INFO L87 Difference]: Start difference. First operand 33 states and 38 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) [2021-12-14 19:32:40,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:40,524 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-12-14 19:32:40,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:32:40,524 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 11 [2021-12-14 19:32:40,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:40,525 INFO L225 Difference]: With dead ends: 37 [2021-12-14 19:32:40,525 INFO L226 Difference]: Without dead ends: 37 [2021-12-14 19:32:40,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-12-14 19:32:40,527 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 75 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:40,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 42 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:40,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-14 19:32:40,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2021-12-14 19:32:40,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:40,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-14 19:32:40,536 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 11 [2021-12-14 19:32:40,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:40,536 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-14 19:32:40,537 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) [2021-12-14 19:32:40,537 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-14 19:32:40,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-14 19:32:40,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:40,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:40,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-14 19:32:40,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:40,756 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:40,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:40,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1319506494, now seen corresponding path program 1 times [2021-12-14 19:32:40,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:40,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156839656] [2021-12-14 19:32:40,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:40,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:40,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:40,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156839656] [2021-12-14 19:32:40,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156839656] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:40,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:40,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:32:40,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562175097] [2021-12-14 19:32:40,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:40,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:32:40,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:40,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:32:40,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:32:40,775 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:40,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:40,789 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-12-14 19:32:40,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:32:40,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-14 19:32:40,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:40,790 INFO L225 Difference]: With dead ends: 23 [2021-12-14 19:32:40,790 INFO L226 Difference]: Without dead ends: 23 [2021-12-14 19:32:40,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:32:40,790 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:40,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 28 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:40,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-14 19:32:40,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-14 19:32:40,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.368421052631579) internal successors, (26), 22 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) [2021-12-14 19:32:40,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-14 19:32:40,792 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 13 [2021-12-14 19:32:40,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:40,792 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-14 19:32:40,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:40,792 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-14 19:32:40,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-14 19:32:40,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:40,793 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:40,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 19:32:40,793 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:40,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:40,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1319506495, now seen corresponding path program 1 times [2021-12-14 19:32:40,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:40,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981561381] [2021-12-14 19:32:40,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:40,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:40,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:40,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981561381] [2021-12-14 19:32:40,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981561381] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:40,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809123013] [2021-12-14 19:32:40,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:40,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:40,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:40,848 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) [2021-12-14 19:32:40,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 19:32:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:40,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-14 19:32:40,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:40,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:40,970 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 16 [2021-12-14 19:32:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:40,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809123013] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:40,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:40,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-12-14 19:32:40,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073815794] [2021-12-14 19:32:40,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:40,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 19:32:40,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:40,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 19:32:40,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:32:40,988 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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) [2021-12-14 19:32:41,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:41,061 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-12-14 19:32:41,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:32:41,061 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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 13 [2021-12-14 19:32:41,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:41,062 INFO L225 Difference]: With dead ends: 36 [2021-12-14 19:32:41,062 INFO L226 Difference]: Without dead ends: 36 [2021-12-14 19:32:41,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-12-14 19:32:41,062 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 88 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:41,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 56 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:41,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-14 19:32:41,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2021-12-14 19:32:41,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.35) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:41,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-14 19:32:41,064 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 13 [2021-12-14 19:32:41,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:41,064 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-14 19:32:41,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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) [2021-12-14 19:32:41,065 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-14 19:32:41,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-14 19:32:41,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:41,065 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:41,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:41,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:41,274 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:41,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:41,274 INFO L85 PathProgramCache]: Analyzing trace with hash -2044971629, now seen corresponding path program 1 times [2021-12-14 19:32:41,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:41,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522740760] [2021-12-14 19:32:41,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:41,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:41,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:32:41,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:41,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522740760] [2021-12-14 19:32:41,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522740760] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:41,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:41,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:32:41,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734271012] [2021-12-14 19:32:41,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:41,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:32:41,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:41,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:32:41,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:32:41,309 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:41,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:41,332 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-12-14 19:32:41,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:32:41,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-14 19:32:41,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:41,333 INFO L225 Difference]: With dead ends: 23 [2021-12-14 19:32:41,333 INFO L226 Difference]: Without dead ends: 23 [2021-12-14 19:32:41,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:32:41,333 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:41,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 27 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:41,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-14 19:32:41,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-14 19:32:41,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.3) internal successors, (26), 22 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) [2021-12-14 19:32:41,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-14 19:32:41,335 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-12-14 19:32:41,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:41,336 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-14 19:32:41,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:41,336 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-14 19:32:41,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-14 19:32:41,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:41,336 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:41,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 19:32:41,336 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:41,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:41,337 INFO L85 PathProgramCache]: Analyzing trace with hash -2044971628, now seen corresponding path program 1 times [2021-12-14 19:32:41,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:41,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826306175] [2021-12-14 19:32:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:41,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:41,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:32:41,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:41,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826306175] [2021-12-14 19:32:41,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826306175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:41,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:41,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:32:41,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324745861] [2021-12-14 19:32:41,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:41,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:32:41,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:41,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:32:41,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:32:41,373 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:41,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:41,397 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-12-14 19:32:41,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:32:41,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-14 19:32:41,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:41,398 INFO L225 Difference]: With dead ends: 30 [2021-12-14 19:32:41,398 INFO L226 Difference]: Without dead ends: 30 [2021-12-14 19:32:41,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:32:41,399 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:41,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 34 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:41,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-14 19:32:41,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2021-12-14 19:32:41,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:41,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-14 19:32:41,404 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-12-14 19:32:41,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:41,407 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-14 19:32:41,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:41,407 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-14 19:32:41,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 19:32:41,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:41,408 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:41,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 19:32:41,408 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:41,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:41,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1933649190, now seen corresponding path program 1 times [2021-12-14 19:32:41,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:41,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786981993] [2021-12-14 19:32:41,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:41,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:41,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:32:41,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:41,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786981993] [2021-12-14 19:32:41,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786981993] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:41,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:41,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 19:32:41,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035073130] [2021-12-14 19:32:41,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:41,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 19:32:41,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:41,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 19:32:41,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:32:41,501 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2021-12-14 19:32:41,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:41,547 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-12-14 19:32:41,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:32:41,547 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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 [2021-12-14 19:32:41,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:41,549 INFO L225 Difference]: With dead ends: 39 [2021-12-14 19:32:41,549 INFO L226 Difference]: Without dead ends: 39 [2021-12-14 19:32:41,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:32:41,550 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:41,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 75 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:41,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-14 19:32:41,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2021-12-14 19:32:41,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:41,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-12-14 19:32:41,557 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 17 [2021-12-14 19:32:41,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:41,557 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-12-14 19:32:41,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2021-12-14 19:32:41,558 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-12-14 19:32:41,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 19:32:41,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:41,559 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:41,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 19:32:41,560 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:41,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:41,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1350200856, now seen corresponding path program 1 times [2021-12-14 19:32:41,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:41,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291112843] [2021-12-14 19:32:41,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:41,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:32:41,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:41,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291112843] [2021-12-14 19:32:41,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291112843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:41,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:41,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 19:32:41,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468734452] [2021-12-14 19:32:41,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:41,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 19:32:41,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:41,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 19:32:41,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 19:32:41,642 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-12-14 19:32:41,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:41,731 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2021-12-14 19:32:41,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 19:32:41,732 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-12-14 19:32:41,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:41,732 INFO L225 Difference]: With dead ends: 62 [2021-12-14 19:32:41,732 INFO L226 Difference]: Without dead ends: 62 [2021-12-14 19:32:41,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-14 19:32:41,733 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 41 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:41,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 93 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:41,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-14 19:32:41,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 36. [2021-12-14 19:32:41,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:41,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-12-14 19:32:41,735 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 17 [2021-12-14 19:32:41,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:41,735 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-12-14 19:32:41,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-12-14 19:32:41,735 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-12-14 19:32:41,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 19:32:41,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:41,736 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:41,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 19:32:41,736 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:41,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:41,736 INFO L85 PathProgramCache]: Analyzing trace with hash 70337178, now seen corresponding path program 1 times [2021-12-14 19:32:41,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:41,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872372218] [2021-12-14 19:32:41,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:41,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:41,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:41,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872372218] [2021-12-14 19:32:41,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872372218] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:41,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047651493] [2021-12-14 19:32:41,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:41,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:41,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:41,825 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) [2021-12-14 19:32:41,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 19:32:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:41,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-14 19:32:41,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:41,928 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 14 treesize of output 10 [2021-12-14 19:32:41,965 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 [2021-12-14 19:32:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:41,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:41,991 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 13 treesize of output 11 [2021-12-14 19:32:41,994 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 [2021-12-14 19:32:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:42,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047651493] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:42,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:42,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2021-12-14 19:32:42,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880463107] [2021-12-14 19:32:42,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:42,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-14 19:32:42,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:42,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-14 19:32:42,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-12-14 19:32:42,063 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:42,224 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2021-12-14 19:32:42,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 19:32:42,225 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-14 19:32:42,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:42,225 INFO L225 Difference]: With dead ends: 71 [2021-12-14 19:32:42,225 INFO L226 Difference]: Without dead ends: 71 [2021-12-14 19:32:42,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2021-12-14 19:32:42,226 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 100 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:42,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 92 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:32:42,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-14 19:32:42,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 40. [2021-12-14 19:32:42,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-12-14 19:32:42,227 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 17 [2021-12-14 19:32:42,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:42,228 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-12-14 19:32:42,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,228 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-12-14 19:32:42,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 19:32:42,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:42,228 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:42,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:42,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-14 19:32:42,429 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:42,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:42,429 INFO L85 PathProgramCache]: Analyzing trace with hash 186362076, now seen corresponding path program 1 times [2021-12-14 19:32:42,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:42,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783387403] [2021-12-14 19:32:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:42,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:42,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:32:42,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:42,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783387403] [2021-12-14 19:32:42,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783387403] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:32:42,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:32:42,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:32:42,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922300136] [2021-12-14 19:32:42,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:32:42,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:32:42,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:42,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:32:42,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:32:42,465 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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) [2021-12-14 19:32:42,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:42,473 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-12-14 19:32:42,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:32:42,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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 [2021-12-14 19:32:42,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:42,474 INFO L225 Difference]: With dead ends: 39 [2021-12-14 19:32:42,474 INFO L226 Difference]: Without dead ends: 24 [2021-12-14 19:32:42,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:32:42,474 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:42,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 32 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:32:42,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-14 19:32:42,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-14 19:32:42,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-12-14 19:32:42,476 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2021-12-14 19:32:42,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:42,476 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-12-14 19:32:42,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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) [2021-12-14 19:32:42,476 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-12-14 19:32:42,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-14 19:32:42,477 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:42,477 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:42,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 19:32:42,477 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:42,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:42,477 INFO L85 PathProgramCache]: Analyzing trace with hash -2146020323, now seen corresponding path program 2 times [2021-12-14 19:32:42,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:42,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086077198] [2021-12-14 19:32:42,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:42,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:42,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:42,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:42,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086077198] [2021-12-14 19:32:42,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086077198] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:42,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654541879] [2021-12-14 19:32:42,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:32:42,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:42,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:42,559 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) [2021-12-14 19:32:42,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 19:32:42,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:32:42,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:32:42,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 19:32:42,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:42,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:42,822 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 [2021-12-14 19:32:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:42,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654541879] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:42,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:42,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2021-12-14 19:32:42,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388987222] [2021-12-14 19:32:42,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:42,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 19:32:42,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:42,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 19:32:42,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-12-14 19:32:42,850 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 18 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) [2021-12-14 19:32:42,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:42,948 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-12-14 19:32:42,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 19:32:42,948 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 18 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 21 [2021-12-14 19:32:42,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:42,948 INFO L225 Difference]: With dead ends: 31 [2021-12-14 19:32:42,948 INFO L226 Difference]: Without dead ends: 31 [2021-12-14 19:32:42,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-12-14 19:32:42,949 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 125 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:42,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 62 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:32:42,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-14 19:32:42,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-12-14 19:32:42,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:42,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-12-14 19:32:42,950 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2021-12-14 19:32:42,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:42,950 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-12-14 19:32:42,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 18 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) [2021-12-14 19:32:42,951 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-12-14 19:32:42,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-14 19:32:42,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:42,951 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:42,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:43,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-14 19:32:43,165 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:43,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:43,166 INFO L85 PathProgramCache]: Analyzing trace with hash -2102120586, now seen corresponding path program 1 times [2021-12-14 19:32:43,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:43,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140374401] [2021-12-14 19:32:43,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:43,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:43,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:43,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140374401] [2021-12-14 19:32:43,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140374401] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:43,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680426194] [2021-12-14 19:32:43,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:43,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:43,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:43,243 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) [2021-12-14 19:32:43,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 19:32:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:43,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-14 19:32:43,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:43,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:32:43,317 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 9 treesize of output 11 [2021-12-14 19:32:43,319 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 10 treesize of output 8 [2021-12-14 19:32:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:43,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:43,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680426194] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:43,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:43,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2021-12-14 19:32:43,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790865481] [2021-12-14 19:32:43,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:43,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 19:32:43,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:43,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 19:32:43,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-12-14 19:32:43,600 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:43,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:43,738 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-12-14 19:32:43,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 19:32:43,738 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-14 19:32:43,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:43,738 INFO L225 Difference]: With dead ends: 30 [2021-12-14 19:32:43,739 INFO L226 Difference]: Without dead ends: 30 [2021-12-14 19:32:43,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-12-14 19:32:43,739 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 68 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:43,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 60 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:32:43,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-14 19:32:43,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-12-14 19:32:43,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:43,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-12-14 19:32:43,741 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 22 [2021-12-14 19:32:43,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:43,741 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-12-14 19:32:43,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:43,741 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-12-14 19:32:43,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-14 19:32:43,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:43,741 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:43,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:43,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:43,942 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:43,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:43,942 INFO L85 PathProgramCache]: Analyzing trace with hash 643759544, now seen corresponding path program 3 times [2021-12-14 19:32:43,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:43,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124985116] [2021-12-14 19:32:43,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:43,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:44,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:44,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:44,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124985116] [2021-12-14 19:32:44,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124985116] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:44,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171433886] [2021-12-14 19:32:44,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 19:32:44,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:44,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:44,172 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) [2021-12-14 19:32:44,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 19:32:44,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-14 19:32:44,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:32:44,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-14 19:32:44,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:44,247 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 10 treesize of output 8 [2021-12-14 19:32:44,359 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 14 treesize of output 10 [2021-12-14 19:32:44,433 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 17 treesize of output 19 [2021-12-14 19:32:44,500 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-14 19:32:44,500 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 18 treesize of output 10 [2021-12-14 19:32:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:44,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:44,586 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_259 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_259) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-14 19:32:44,597 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_259 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_259) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 1)) 0)) is different from false [2021-12-14 19:32:44,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:32:44,611 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 23 treesize of output 24 [2021-12-14 19:32:44,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:32:44,619 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 37 treesize of output 37 [2021-12-14 19:32:44,621 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 11 treesize of output 7 [2021-12-14 19:32:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-14 19:32:44,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171433886] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:44,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:44,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2021-12-14 19:32:44,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714551448] [2021-12-14 19:32:44,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:44,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-14 19:32:44,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:44,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-14 19:32:44,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=567, Unknown=2, NotChecked=98, Total=756 [2021-12-14 19:32:44,799 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:45,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:45,042 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-12-14 19:32:45,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 19:32:45,043 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-14 19:32:45,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:45,043 INFO L225 Difference]: With dead ends: 44 [2021-12-14 19:32:45,043 INFO L226 Difference]: Without dead ends: 35 [2021-12-14 19:32:45,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 2 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=974, Unknown=2, NotChecked=130, Total=1260 [2021-12-14 19:32:45,045 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:45,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 141 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 182 Invalid, 0 Unknown, 105 Unchecked, 0.1s Time] [2021-12-14 19:32:45,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-14 19:32:45,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-12-14 19:32:45,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:45,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-12-14 19:32:45,046 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 25 [2021-12-14 19:32:45,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:45,046 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-12-14 19:32:45,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:45,046 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-12-14 19:32:45,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-14 19:32:45,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:45,047 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:45,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:45,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:45,260 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:45,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:45,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1470618683, now seen corresponding path program 4 times [2021-12-14 19:32:45,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:45,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624864990] [2021-12-14 19:32:45,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:45,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:45,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:45,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:45,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624864990] [2021-12-14 19:32:45,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624864990] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:45,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968622892] [2021-12-14 19:32:45,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 19:32:45,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:45,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:45,367 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) [2021-12-14 19:32:45,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 19:32:45,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 19:32:45,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:32:45,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 19:32:45,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:45,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:45,703 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 7 treesize of output 5 [2021-12-14 19:32:45,728 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:45,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968622892] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:45,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:45,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-14 19:32:45,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41779401] [2021-12-14 19:32:45,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:45,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-14 19:32:45,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:45,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-14 19:32:45,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-12-14 19:32:45,729 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:45,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:45,869 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-12-14 19:32:45,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 19:32:45,870 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-14 19:32:45,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:45,870 INFO L225 Difference]: With dead ends: 39 [2021-12-14 19:32:45,870 INFO L226 Difference]: Without dead ends: 39 [2021-12-14 19:32:45,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-12-14 19:32:45,871 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 76 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:45,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 80 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:32:45,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-14 19:32:45,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2021-12-14 19:32:45,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 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) [2021-12-14 19:32:45,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-12-14 19:32:45,873 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 29 [2021-12-14 19:32:45,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:45,873 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-12-14 19:32:45,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:45,873 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-12-14 19:32:45,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-14 19:32:45,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:45,874 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:45,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:46,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:46,075 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:46,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:46,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1655461096, now seen corresponding path program 2 times [2021-12-14 19:32:46,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:46,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262859801] [2021-12-14 19:32:46,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:46,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:46,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:46,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262859801] [2021-12-14 19:32:46,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262859801] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:46,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697839570] [2021-12-14 19:32:46,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:32:46,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:46,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:46,176 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) [2021-12-14 19:32:46,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 19:32:46,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:32:46,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:32:46,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-14 19:32:46,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:46,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:32:46,254 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 9 treesize of output 11 [2021-12-14 19:32:46,258 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 10 treesize of output 8 [2021-12-14 19:32:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:46,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:46,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697839570] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:46,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:46,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2021-12-14 19:32:46,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355499415] [2021-12-14 19:32:46,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:46,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-14 19:32:46,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:46,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-14 19:32:46,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-12-14 19:32:46,694 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 24 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) [2021-12-14 19:32:46,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:46,913 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-12-14 19:32:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 19:32:46,914 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 24 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 30 [2021-12-14 19:32:46,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:46,915 INFO L225 Difference]: With dead ends: 38 [2021-12-14 19:32:46,915 INFO L226 Difference]: Without dead ends: 38 [2021-12-14 19:32:46,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2021-12-14 19:32:46,917 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 106 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:46,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 71 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:32:46,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-14 19:32:46,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-12-14 19:32:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 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) [2021-12-14 19:32:46,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-12-14 19:32:46,918 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2021-12-14 19:32:46,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:46,919 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-12-14 19:32:46,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 24 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) [2021-12-14 19:32:46,919 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-12-14 19:32:46,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-14 19:32:46,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:46,920 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:46,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:47,121 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,SelfDestructingSolverStorable21 [2021-12-14 19:32:47,121 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:47,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:47,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1267943126, now seen corresponding path program 5 times [2021-12-14 19:32:47,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:47,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285996788] [2021-12-14 19:32:47,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:47,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:47,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:47,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:47,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285996788] [2021-12-14 19:32:47,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285996788] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:47,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008343923] [2021-12-14 19:32:47,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 19:32:47,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:47,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:47,332 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) [2021-12-14 19:32:47,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 19:32:47,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-14 19:32:47,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:32:47,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-14 19:32:47,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:47,419 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 10 treesize of output 8 [2021-12-14 19:32:47,569 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 14 treesize of output 10 [2021-12-14 19:32:47,649 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 17 treesize of output 19 [2021-12-14 19:32:47,706 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 16 treesize of output 18 [2021-12-14 19:32:47,730 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 [2021-12-14 19:32:47,736 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:47,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:47,753 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_374 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_374) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-14 19:32:47,759 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_374 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_374) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:32:47,774 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_374 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_374) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2021-12-14 19:32:47,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:32:47,789 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 23 treesize of output 24 [2021-12-14 19:32:47,794 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:32:47,794 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 37 treesize of output 37 [2021-12-14 19:32:47,797 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 11 treesize of output 7 [2021-12-14 19:32:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-12-14 19:32:47,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008343923] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:47,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:47,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 27 [2021-12-14 19:32:47,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776711216] [2021-12-14 19:32:47,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:47,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-14 19:32:47,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:47,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-14 19:32:47,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=487, Unknown=3, NotChecked=138, Total=702 [2021-12-14 19:32:47,957 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:48,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:48,246 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-12-14 19:32:48,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 19:32:48,247 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 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 33 [2021-12-14 19:32:48,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:48,247 INFO L225 Difference]: With dead ends: 56 [2021-12-14 19:32:48,247 INFO L226 Difference]: Without dead ends: 43 [2021-12-14 19:32:48,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=915, Unknown=3, NotChecked=192, Total=1260 [2021-12-14 19:32:48,248 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:48,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 166 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 266 Invalid, 0 Unknown, 120 Unchecked, 0.1s Time] [2021-12-14 19:32:48,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-14 19:32:48,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-12-14 19:32:48,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:48,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-12-14 19:32:48,249 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 33 [2021-12-14 19:32:48,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:48,249 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-12-14 19:32:48,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:48,250 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-12-14 19:32:48,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-14 19:32:48,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:48,250 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:48,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:48,450 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,SelfDestructingSolverStorable22 [2021-12-14 19:32:48,450 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:48,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:48,451 INFO L85 PathProgramCache]: Analyzing trace with hash -333254055, now seen corresponding path program 6 times [2021-12-14 19:32:48,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:48,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897308119] [2021-12-14 19:32:48,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:48,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:48,576 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:48,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:48,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897308119] [2021-12-14 19:32:48,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897308119] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:48,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459032335] [2021-12-14 19:32:48,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 19:32:48,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:48,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:48,578 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:32:48,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 19:32:48,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-14 19:32:48,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:32:48,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-14 19:32:48,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:48,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:48,950 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 22 treesize of output 18 [2021-12-14 19:32:49,072 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:49,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459032335] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:49,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:49,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2021-12-14 19:32:49,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595792571] [2021-12-14 19:32:49,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:49,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-14 19:32:49,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:49,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-14 19:32:49,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-12-14 19:32:49,074 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 27 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:49,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:49,279 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-12-14 19:32:49,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 19:32:49,280 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 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 [2021-12-14 19:32:49,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:49,280 INFO L225 Difference]: With dead ends: 47 [2021-12-14 19:32:49,280 INFO L226 Difference]: Without dead ends: 47 [2021-12-14 19:32:49,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 19:32:49,281 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 126 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:49,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 128 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:32:49,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-14 19:32:49,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2021-12-14 19:32:49,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 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) [2021-12-14 19:32:49,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-12-14 19:32:49,282 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 37 [2021-12-14 19:32:49,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:49,282 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-12-14 19:32:49,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:49,282 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-12-14 19:32:49,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-14 19:32:49,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:49,283 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:49,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:49,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-14 19:32:49,483 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:49,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:49,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1740941126, now seen corresponding path program 3 times [2021-12-14 19:32:49,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:49,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352401936] [2021-12-14 19:32:49,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:49,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:49,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:49,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352401936] [2021-12-14 19:32:49,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352401936] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:49,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502363136] [2021-12-14 19:32:49,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 19:32:49,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:49,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:49,589 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:32:49,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-14 19:32:49,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-14 19:32:49,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:32:49,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-14 19:32:49,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:49,701 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:32:49,701 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:32:49,714 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 10 treesize of output 8 [2021-12-14 19:32:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-14 19:32:50,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:50,402 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-14 19:32:50,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502363136] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:50,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:50,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2021-12-14 19:32:50,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185957221] [2021-12-14 19:32:50,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:50,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-14 19:32:50,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:50,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-14 19:32:50,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-12-14 19:32:50,404 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 25 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:51,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:51,010 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2021-12-14 19:32:51,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 19:32:51,011 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 states have internal predecessors, (82), 0 states have call successors, (0), 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 [2021-12-14 19:32:51,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:51,011 INFO L225 Difference]: With dead ends: 59 [2021-12-14 19:32:51,011 INFO L226 Difference]: Without dead ends: 59 [2021-12-14 19:32:51,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=310, Invalid=1250, Unknown=0, NotChecked=0, Total=1560 [2021-12-14 19:32:51,012 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 93 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:51,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 108 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 274 Invalid, 0 Unknown, 12 Unchecked, 0.2s Time] [2021-12-14 19:32:51,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-14 19:32:51,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-12-14 19:32:51,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:51,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-12-14 19:32:51,013 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 38 [2021-12-14 19:32:51,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:51,014 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-12-14 19:32:51,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:51,014 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-12-14 19:32:51,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 19:32:51,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:51,014 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:51,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:51,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-14 19:32:51,215 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:51,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:51,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1647975924, now seen corresponding path program 7 times [2021-12-14 19:32:51,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:51,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062758120] [2021-12-14 19:32:51,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:51,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:51,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:51,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:51,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062758120] [2021-12-14 19:32:51,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062758120] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:51,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390995030] [2021-12-14 19:32:51,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 19:32:51,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:51,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:51,434 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:32:51,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-14 19:32:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:51,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-14 19:32:51,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:51,521 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 10 treesize of output 8 [2021-12-14 19:32:51,708 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 14 treesize of output 10 [2021-12-14 19:32:51,780 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 17 treesize of output 19 [2021-12-14 19:32:51,821 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 16 treesize of output 18 [2021-12-14 19:32:51,836 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 16 treesize of output 18 [2021-12-14 19:32:51,857 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 [2021-12-14 19:32:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:51,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:51,875 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_514 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_514) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-14 19:32:51,883 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_514 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_514) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:32:51,905 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_514 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_514) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:32:51,925 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_514 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_514) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2021-12-14 19:32:51,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:32:51,930 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 23 treesize of output 24 [2021-12-14 19:32:51,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:32:51,936 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 37 treesize of output 37 [2021-12-14 19:32:51,939 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 11 treesize of output 7 [2021-12-14 19:32:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 20 not checked. [2021-12-14 19:32:52,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390995030] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:52,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:52,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 31 [2021-12-14 19:32:52,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107670213] [2021-12-14 19:32:52,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:52,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-14 19:32:52,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:52,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-14 19:32:52,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=631, Unknown=4, NotChecked=212, Total=930 [2021-12-14 19:32:52,100 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:52,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:52,429 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2021-12-14 19:32:52,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 19:32:52,429 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-14 19:32:52,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:52,430 INFO L225 Difference]: With dead ends: 80 [2021-12-14 19:32:52,430 INFO L226 Difference]: Without dead ends: 63 [2021-12-14 19:32:52,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=1123, Unknown=4, NotChecked=284, Total=1560 [2021-12-14 19:32:52,431 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 45 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:52,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 239 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 442 Invalid, 0 Unknown, 201 Unchecked, 0.2s Time] [2021-12-14 19:32:52,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-14 19:32:52,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2021-12-14 19:32:52,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 58 states have (on average 1.103448275862069) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:52,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-12-14 19:32:52,433 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 41 [2021-12-14 19:32:52,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:52,433 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-12-14 19:32:52,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:52,434 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-12-14 19:32:52,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 19:32:52,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:52,434 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:52,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:52,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:52,649 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:52,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:52,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1728866697, now seen corresponding path program 8 times [2021-12-14 19:32:52,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:52,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733374841] [2021-12-14 19:32:52,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:52,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 15 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:52,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:52,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733374841] [2021-12-14 19:32:52,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733374841] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:52,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171116851] [2021-12-14 19:32:52,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:32:52,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:52,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:52,811 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:32:52,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-14 19:32:52,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:32:52,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:32:52,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-14 19:32:52,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 28 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:53,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:53,206 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 [2021-12-14 19:32:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 28 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:53,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171116851] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:53,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:53,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 29 [2021-12-14 19:32:53,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762457361] [2021-12-14 19:32:53,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:53,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-14 19:32:53,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:53,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-14 19:32:53,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-12-14 19:32:53,262 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 30 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 30 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:53,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:53,530 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2021-12-14 19:32:53,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 19:32:53,530 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 30 states have internal predecessors, (92), 0 states have call successors, (0), 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 45 [2021-12-14 19:32:53,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:53,530 INFO L225 Difference]: With dead ends: 60 [2021-12-14 19:32:53,531 INFO L226 Difference]: Without dead ends: 60 [2021-12-14 19:32:53,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 19:32:53,532 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 141 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:53,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 192 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:32:53,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-14 19:32:53,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-14 19:32:53,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 59 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:53,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2021-12-14 19:32:53,534 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 45 [2021-12-14 19:32:53,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:53,534 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2021-12-14 19:32:53,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 30 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:53,534 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2021-12-14 19:32:53,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-14 19:32:53,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:53,535 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:53,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-14 19:32:53,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-14 19:32:53,736 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:53,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:53,736 INFO L85 PathProgramCache]: Analyzing trace with hash 801080082, now seen corresponding path program 9 times [2021-12-14 19:32:53,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:53,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420550406] [2021-12-14 19:32:53,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:53,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:54,006 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:54,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:54,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420550406] [2021-12-14 19:32:54,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420550406] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:54,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603326050] [2021-12-14 19:32:54,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 19:32:54,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:54,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:54,008 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:32:54,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-14 19:32:54,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-14 19:32:54,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:32:54,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-14 19:32:54,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:54,128 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 10 treesize of output 8 [2021-12-14 19:32:54,434 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 14 treesize of output 10 [2021-12-14 19:32:54,515 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 16 treesize of output 18 [2021-12-14 19:32:54,598 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 16 treesize of output 18 [2021-12-14 19:32:54,672 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 16 treesize of output 18 [2021-12-14 19:32:54,749 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 16 treesize of output 18 [2021-12-14 19:32:54,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:32:54,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:32:54,825 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 17 treesize of output 10 [2021-12-14 19:32:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:54,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:54,862 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_625 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_625) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-14 19:32:54,869 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_625 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_625) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:32:54,881 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_625 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_625) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:32:54,892 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_625 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_625) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-14 19:32:54,903 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_625 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_625) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 4)) 0)) is different from false [2021-12-14 19:32:54,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:32:54,910 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 23 treesize of output 24 [2021-12-14 19:32:54,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:32:54,914 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 37 treesize of output 37 [2021-12-14 19:32:54,917 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 11 treesize of output 7 [2021-12-14 19:32:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 35 not checked. [2021-12-14 19:32:55,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603326050] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:55,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:55,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2021-12-14 19:32:55,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022470061] [2021-12-14 19:32:55,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:55,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-14 19:32:55,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:55,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-14 19:32:55,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1513, Unknown=5, NotChecked=410, Total=2070 [2021-12-14 19:32:55,236 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 46 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:55,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:55,588 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2021-12-14 19:32:55,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-14 19:32:55,589 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-14 19:32:55,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:55,589 INFO L225 Difference]: With dead ends: 88 [2021-12-14 19:32:55,589 INFO L226 Difference]: Without dead ends: 67 [2021-12-14 19:32:55,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 5 IntricatePredicates, 2 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=203, Invalid=2164, Unknown=5, NotChecked=490, Total=2862 [2021-12-14 19:32:55,590 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 251 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:55,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 326 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 350 Invalid, 0 Unknown, 251 Unchecked, 0.1s Time] [2021-12-14 19:32:55,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-14 19:32:55,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2021-12-14 19:32:55,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 63 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:55,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2021-12-14 19:32:55,591 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 49 [2021-12-14 19:32:55,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:55,591 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2021-12-14 19:32:55,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:55,592 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2021-12-14 19:32:55,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-14 19:32:55,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:55,592 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:55,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:55,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-14 19:32:55,807 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:55,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:55,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1870280555, now seen corresponding path program 10 times [2021-12-14 19:32:55,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:55,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883709135] [2021-12-14 19:32:55,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:55,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:55,987 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 28 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:55,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:55,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883709135] [2021-12-14 19:32:55,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883709135] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:55,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701520049] [2021-12-14 19:32:55,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 19:32:55,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:55,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:55,988 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:32:55,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-14 19:32:56,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 19:32:56,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:32:56,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-14 19:32:56,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 50 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:56,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:56,540 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 7 treesize of output 5 [2021-12-14 19:32:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 50 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:56,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701520049] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:56,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:56,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2021-12-14 19:32:56,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946276705] [2021-12-14 19:32:56,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:56,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 19:32:56,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:56,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 19:32:56,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 19:32:56,577 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 33 states, 32 states have (on average 3.5) internal successors, (112), 33 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:56,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:56,866 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2021-12-14 19:32:56,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 19:32:56,866 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.5) internal successors, (112), 33 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-14 19:32:56,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:56,866 INFO L225 Difference]: With dead ends: 64 [2021-12-14 19:32:56,867 INFO L226 Difference]: Without dead ends: 64 [2021-12-14 19:32:56,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=330, Invalid=1310, Unknown=0, NotChecked=0, Total=1640 [2021-12-14 19:32:56,871 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 158 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:56,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 194 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:32:56,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-14 19:32:56,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-12-14 19:32:56,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.064516129032258) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:56,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-12-14 19:32:56,873 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 53 [2021-12-14 19:32:56,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:56,873 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-12-14 19:32:56,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.5) internal successors, (112), 33 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:56,873 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-12-14 19:32:56,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-14 19:32:56,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:56,874 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:56,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:57,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-14 19:32:57,074 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:57,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:57,075 INFO L85 PathProgramCache]: Analyzing trace with hash -795904464, now seen corresponding path program 11 times [2021-12-14 19:32:57,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:57,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316479850] [2021-12-14 19:32:57,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:57,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:57,357 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:57,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:57,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316479850] [2021-12-14 19:32:57,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316479850] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:57,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806133217] [2021-12-14 19:32:57,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 19:32:57,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:57,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:57,359 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:32:57,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-14 19:32:57,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-14 19:32:57,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:32:57,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-14 19:32:57,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:57,566 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 10 treesize of output 8 [2021-12-14 19:32:57,791 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 14 treesize of output 10 [2021-12-14 19:32:57,891 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 17 treesize of output 19 [2021-12-14 19:32:57,936 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 16 treesize of output 18 [2021-12-14 19:32:57,951 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 16 treesize of output 18 [2021-12-14 19:32:57,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-14 19:32:57,987 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 16 treesize of output 18 [2021-12-14 19:32:58,015 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 [2021-12-14 19:32:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:58,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:58,037 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_755 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_755) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)))) is different from false [2021-12-14 19:32:58,043 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_755) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:32:58,052 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_755) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:32:58,063 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_755) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-14 19:32:58,073 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_755) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 5 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:32:58,088 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_755) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 5 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2021-12-14 19:32:58,092 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:32:58,093 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 23 treesize of output 24 [2021-12-14 19:32:58,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:32:58,097 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 37 treesize of output 37 [2021-12-14 19:32:58,099 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 11 treesize of output 7 [2021-12-14 19:32:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 11 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 54 not checked. [2021-12-14 19:32:58,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806133217] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:58,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:58,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 39 [2021-12-14 19:32:58,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699768714] [2021-12-14 19:32:58,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:58,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-14 19:32:58,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:58,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-14 19:32:58,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=972, Unknown=6, NotChecked=402, Total=1482 [2021-12-14 19:32:58,297 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 39 states, 39 states have (on average 3.0) internal successors, (117), 39 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:58,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:58,962 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2021-12-14 19:32:58,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-14 19:32:58,962 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.0) internal successors, (117), 39 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-14 19:32:58,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:58,963 INFO L225 Difference]: With dead ends: 96 [2021-12-14 19:32:58,963 INFO L226 Difference]: Without dead ends: 71 [2021-12-14 19:32:58,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 96 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=181, Invalid=1729, Unknown=6, NotChecked=534, Total=2450 [2021-12-14 19:32:58,964 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 37 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 357 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:58,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 460 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 978 Invalid, 0 Unknown, 357 Unchecked, 0.4s Time] [2021-12-14 19:32:58,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-14 19:32:58,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-12-14 19:32:58,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:58,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-12-14 19:32:58,965 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 57 [2021-12-14 19:32:58,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:58,965 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-12-14 19:32:58,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.0) internal successors, (117), 39 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:58,965 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-12-14 19:32:58,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-14 19:32:58,965 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:58,965 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:58,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:59,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:59,166 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:32:59,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:59,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1548060851, now seen corresponding path program 12 times [2021-12-14 19:32:59,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:59,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893108639] [2021-12-14 19:32:59,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:59,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 45 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:59,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:59,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893108639] [2021-12-14 19:32:59,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893108639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:59,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129605265] [2021-12-14 19:32:59,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 19:32:59,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:59,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:59,375 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:32:59,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-14 19:32:59,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-14 19:32:59,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:32:59,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-14 19:32:59,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:59,865 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 66 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:59,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:00,121 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 7 treesize of output 5 [2021-12-14 19:33:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 66 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:00,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129605265] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:00,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:00,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 43 [2021-12-14 19:33:00,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428171236] [2021-12-14 19:33:00,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:00,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-14 19:33:00,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:00,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-14 19:33:00,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1611, Unknown=0, NotChecked=0, Total=1892 [2021-12-14 19:33:00,179 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 44 states, 43 states have (on average 3.372093023255814) internal successors, (145), 44 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) [2021-12-14 19:33:00,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:00,562 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-12-14 19:33:00,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 19:33:00,563 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.372093023255814) internal successors, (145), 44 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) Word has length 61 [2021-12-14 19:33:00,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:00,563 INFO L225 Difference]: With dead ends: 70 [2021-12-14 19:33:00,563 INFO L226 Difference]: Without dead ends: 70 [2021-12-14 19:33:00,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=551, Invalid=2205, Unknown=0, NotChecked=0, Total=2756 [2021-12-14 19:33:00,564 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 364 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:00,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 250 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:33:00,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-14 19:33:00,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2021-12-14 19:33:00,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:00,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-12-14 19:33:00,565 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 61 [2021-12-14 19:33:00,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:00,566 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-12-14 19:33:00,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.372093023255814) internal successors, (145), 44 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) [2021-12-14 19:33:00,566 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-12-14 19:33:00,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 19:33:00,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:00,566 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:00,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-14 19:33:00,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:00,779 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:33:00,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:00,780 INFO L85 PathProgramCache]: Analyzing trace with hash 940963662, now seen corresponding path program 13 times [2021-12-14 19:33:00,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:00,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927561774] [2021-12-14 19:33:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:00,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 13 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:01,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:01,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927561774] [2021-12-14 19:33:01,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927561774] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:01,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986753228] [2021-12-14 19:33:01,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 19:33:01,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:01,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:01,125 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:01,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-14 19:33:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:01,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-14 19:33:01,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:01,236 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 10 treesize of output 8 [2021-12-14 19:33:01,499 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 14 treesize of output 10 [2021-12-14 19:33:01,585 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 17 treesize of output 19 [2021-12-14 19:33:01,629 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 16 treesize of output 18 [2021-12-14 19:33:01,652 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 16 treesize of output 18 [2021-12-14 19:33:01,668 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 16 treesize of output 18 [2021-12-14 19:33:01,685 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 16 treesize of output 18 [2021-12-14 19:33:01,701 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 16 treesize of output 18 [2021-12-14 19:33:01,738 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 [2021-12-14 19:33:01,743 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 13 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:01,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:01,755 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_900 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_900) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-14 19:33:01,763 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_900 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_900) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:33:01,772 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_900 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_900) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:33:01,781 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_900 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_900) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-14 19:33:01,791 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_900 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_900) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 5 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:33:01,808 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_900 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_900) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 6 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:33:01,821 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_900 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_900) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2021-12-14 19:33:01,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:33:01,826 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 23 treesize of output 24 [2021-12-14 19:33:01,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:33:01,832 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 37 treesize of output 37 [2021-12-14 19:33:01,835 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 11 treesize of output 7 [2021-12-14 19:33:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 13 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 77 not checked. [2021-12-14 19:33:02,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986753228] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:02,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:02,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 43 [2021-12-14 19:33:02,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503700860] [2021-12-14 19:33:02,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:02,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-14 19:33:02,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:02,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-14 19:33:02,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1171, Unknown=7, NotChecked=518, Total=1806 [2021-12-14 19:33:02,074 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:02,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:02,796 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2021-12-14 19:33:02,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-14 19:33:02,796 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-14 19:33:02,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:02,796 INFO L225 Difference]: With dead ends: 104 [2021-12-14 19:33:02,796 INFO L226 Difference]: Without dead ends: 75 [2021-12-14 19:33:02,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 56 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=236, Invalid=2335, Unknown=7, NotChecked=728, Total=3306 [2021-12-14 19:33:02,798 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 76 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 490 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:02,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 474 Invalid, 1544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1024 Invalid, 0 Unknown, 490 Unchecked, 0.3s Time] [2021-12-14 19:33:02,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-14 19:33:02,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2021-12-14 19:33:02,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 70 states have (on average 1.042857142857143) internal successors, (73), 71 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) [2021-12-14 19:33:02,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-12-14 19:33:02,800 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 65 [2021-12-14 19:33:02,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:02,800 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-12-14 19:33:02,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:02,800 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-12-14 19:33:02,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 19:33:02,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:02,800 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:02,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-14 19:33:03,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-14 19:33:03,011 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:33:03,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:03,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1553913553, now seen corresponding path program 14 times [2021-12-14 19:33:03,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:03,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654003022] [2021-12-14 19:33:03,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:03,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 66 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:03,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:03,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654003022] [2021-12-14 19:33:03,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654003022] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:03,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408279618] [2021-12-14 19:33:03,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:33:03,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:03,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:03,228 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:03,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-14 19:33:03,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:33:03,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:33:03,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-14 19:33:03,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 91 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:03,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:03,946 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 [2021-12-14 19:33:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 91 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:04,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408279618] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:04,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:04,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 40 [2021-12-14 19:33:04,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416420788] [2021-12-14 19:33:04,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:04,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-14 19:33:04,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:04,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-14 19:33:04,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2021-12-14 19:33:04,011 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 41 states, 40 states have (on average 3.5) internal successors, (140), 41 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) [2021-12-14 19:33:04,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:04,647 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-12-14 19:33:04,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 19:33:04,648 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.5) internal successors, (140), 41 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-14 19:33:04,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:04,648 INFO L225 Difference]: With dead ends: 79 [2021-12-14 19:33:04,648 INFO L226 Difference]: Without dead ends: 79 [2021-12-14 19:33:04,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=627, Invalid=2679, Unknown=0, NotChecked=0, Total=3306 [2021-12-14 19:33:04,649 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 333 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:04,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 310 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:33:04,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-14 19:33:04,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2021-12-14 19:33:04,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:04,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-12-14 19:33:04,651 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 69 [2021-12-14 19:33:04,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:04,651 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-12-14 19:33:04,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.5) internal successors, (140), 41 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) [2021-12-14 19:33:04,651 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-12-14 19:33:04,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-14 19:33:04,652 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:04,652 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:04,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-14 19:33:04,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-14 19:33:04,868 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:33:04,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:04,869 INFO L85 PathProgramCache]: Analyzing trace with hash 926679874, now seen corresponding path program 4 times [2021-12-14 19:33:04,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:04,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995477194] [2021-12-14 19:33:04,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:04,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:05,115 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 66 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:05,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:05,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995477194] [2021-12-14 19:33:05,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995477194] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:05,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018206645] [2021-12-14 19:33:05,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 19:33:05,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:05,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:05,127 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:05,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-14 19:33:05,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 19:33:05,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:33:05,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-14 19:33:05,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:05,245 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 10 treesize of output 8 [2021-12-14 19:33:05,254 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 9 treesize of output 11 [2021-12-14 19:33:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 98 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:06,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 120 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:07,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018206645] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:07,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:07,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 54 [2021-12-14 19:33:07,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796816789] [2021-12-14 19:33:07,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:07,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-14 19:33:07,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:07,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-14 19:33:07,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=2639, Unknown=0, NotChecked=0, Total=2970 [2021-12-14 19:33:07,130 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 55 states, 54 states have (on average 3.740740740740741) internal successors, (202), 55 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:07,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:07,618 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-12-14 19:33:07,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-14 19:33:07,618 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 3.740740740740741) internal successors, (202), 55 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-14 19:33:07,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:07,618 INFO L225 Difference]: With dead ends: 76 [2021-12-14 19:33:07,618 INFO L226 Difference]: Without dead ends: 76 [2021-12-14 19:33:07,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=553, Invalid=3737, Unknown=0, NotChecked=0, Total=4290 [2021-12-14 19:33:07,620 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:07,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 422 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 397 Invalid, 0 Unknown, 125 Unchecked, 0.1s Time] [2021-12-14 19:33:07,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-14 19:33:07,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-12-14 19:33:07,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 75 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:07,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2021-12-14 19:33:07,621 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 70 [2021-12-14 19:33:07,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:07,621 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2021-12-14 19:33:07,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 3.740740740740741) internal successors, (202), 55 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:07,622 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2021-12-14 19:33:07,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-14 19:33:07,622 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:07,622 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:07,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-14 19:33:07,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:07,835 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:33:07,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:07,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1329658260, now seen corresponding path program 15 times [2021-12-14 19:33:07,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:07,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936966166] [2021-12-14 19:33:07,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:07,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:08,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:08,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936966166] [2021-12-14 19:33:08,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936966166] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:08,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789971439] [2021-12-14 19:33:08,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 19:33:08,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:08,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:08,246 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:08,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-14 19:33:08,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-14 19:33:08,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:33:08,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-14 19:33:08,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:08,573 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 10 treesize of output 8 [2021-12-14 19:33:08,877 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 14 treesize of output 10 [2021-12-14 19:33:08,973 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 17 treesize of output 19 [2021-12-14 19:33:09,016 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 16 treesize of output 18 [2021-12-14 19:33:09,040 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 16 treesize of output 18 [2021-12-14 19:33:09,057 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 16 treesize of output 18 [2021-12-14 19:33:09,085 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 16 treesize of output 18 [2021-12-14 19:33:09,104 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 16 treesize of output 18 [2021-12-14 19:33:09,122 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 16 treesize of output 18 [2021-12-14 19:33:09,136 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 [2021-12-14 19:33:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:09,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:09,182 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1139 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1139) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-14 19:33:09,188 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1139 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1139) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:33:09,198 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1139 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1139) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:33:09,209 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1139 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1139) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-14 19:33:09,221 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1139 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1139) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 5 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:33:09,233 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1139 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1139) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 6 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:33:09,245 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1139 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1139) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 7 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:33:09,256 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1139 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_1139) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 7 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2021-12-14 19:33:09,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:33:09,261 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 23 treesize of output 24 [2021-12-14 19:33:09,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:33:09,267 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 37 treesize of output 37 [2021-12-14 19:33:09,269 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 11 treesize of output 7 [2021-12-14 19:33:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 104 not checked. [2021-12-14 19:33:09,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789971439] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:09,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:09,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 24] total 47 [2021-12-14 19:33:09,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614563369] [2021-12-14 19:33:09,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:09,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-14 19:33:09,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:09,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-14 19:33:09,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1387, Unknown=8, NotChecked=648, Total=2162 [2021-12-14 19:33:09,515 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 47 states, 47 states have (on average 3.148936170212766) internal successors, (148), 47 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) [2021-12-14 19:33:10,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:10,349 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2021-12-14 19:33:10,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 19:33:10,349 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.148936170212766) internal successors, (148), 47 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) Word has length 73 [2021-12-14 19:33:10,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:10,349 INFO L225 Difference]: With dead ends: 116 [2021-12-14 19:33:10,349 INFO L226 Difference]: Without dead ends: 83 [2021-12-14 19:33:10,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 126 SyntacticMatches, 10 SemanticMatches, 58 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=209, Invalid=2467, Unknown=8, NotChecked=856, Total=3540 [2021-12-14 19:33:10,350 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 38 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 2071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 619 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:10,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 637 Invalid, 2071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1438 Invalid, 0 Unknown, 619 Unchecked, 0.5s Time] [2021-12-14 19:33:10,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-14 19:33:10,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2021-12-14 19:33:10,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 79 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) [2021-12-14 19:33:10,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2021-12-14 19:33:10,352 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 73 [2021-12-14 19:33:10,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:10,352 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2021-12-14 19:33:10,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.148936170212766) internal successors, (148), 47 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) [2021-12-14 19:33:10,352 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2021-12-14 19:33:10,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 19:33:10,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:10,352 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:10,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-14 19:33:10,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:10,569 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:33:10,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:10,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1224585967, now seen corresponding path program 16 times [2021-12-14 19:33:10,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:10,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057279142] [2021-12-14 19:33:10,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:10,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:10,812 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 91 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:10,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:10,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057279142] [2021-12-14 19:33:10,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057279142] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:10,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221650442] [2021-12-14 19:33:10,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 19:33:10,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:10,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:10,813 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:10,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-14 19:33:10,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 19:33:10,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:33:10,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-14 19:33:10,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:11,280 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 128 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:11,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:11,628 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 7 treesize of output 5 [2021-12-14 19:33:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 128 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:11,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221650442] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:11,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:11,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 43 [2021-12-14 19:33:11,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936795837] [2021-12-14 19:33:11,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:11,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-14 19:33:11,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:11,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-14 19:33:11,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1677, Unknown=0, NotChecked=0, Total=1892 [2021-12-14 19:33:11,686 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 44 states, 43 states have (on average 3.7209302325581395) internal successors, (160), 44 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:12,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:12,301 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2021-12-14 19:33:12,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-14 19:33:12,301 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.7209302325581395) internal successors, (160), 44 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-14 19:33:12,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:12,302 INFO L225 Difference]: With dead ends: 87 [2021-12-14 19:33:12,302 INFO L226 Difference]: Without dead ends: 87 [2021-12-14 19:33:12,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=746, Invalid=3160, Unknown=0, NotChecked=0, Total=3906 [2021-12-14 19:33:12,303 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 224 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:12,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 320 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:33:12,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-14 19:33:12,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2021-12-14 19:33:12,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 81 states have (on average 1.037037037037037) internal successors, (84), 82 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:12,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-12-14 19:33:12,304 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 77 [2021-12-14 19:33:12,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:12,305 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-12-14 19:33:12,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.7209302325581395) internal successors, (160), 44 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:12,305 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-12-14 19:33:12,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-14 19:33:12,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:12,305 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:12,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-14 19:33:12,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-14 19:33:12,519 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:33:12,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:12,520 INFO L85 PathProgramCache]: Analyzing trace with hash -692540700, now seen corresponding path program 5 times [2021-12-14 19:33:12,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:12,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265362310] [2021-12-14 19:33:12,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:12,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:12,775 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 91 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:12,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:12,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265362310] [2021-12-14 19:33:12,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265362310] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:12,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528565230] [2021-12-14 19:33:12,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 19:33:12,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:12,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:12,776 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:12,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-14 19:33:13,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-14 19:33:13,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:33:13,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-14 19:33:13,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:13,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:33:13,078 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 9 treesize of output 11 [2021-12-14 19:33:13,080 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 10 treesize of output 8 [2021-12-14 19:33:13,674 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 120 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:13,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 153 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:14,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528565230] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:14,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:14,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 56 [2021-12-14 19:33:14,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121023829] [2021-12-14 19:33:14,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:14,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-14 19:33:14,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:14,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-14 19:33:14,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=2746, Unknown=0, NotChecked=0, Total=3192 [2021-12-14 19:33:14,456 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 57 states, 56 states have (on average 3.875) internal successors, (217), 57 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:14,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:14,983 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2021-12-14 19:33:14,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-14 19:33:14,983 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.875) internal successors, (217), 57 states have internal predecessors, (217), 0 states have call successors, (0), 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 78 [2021-12-14 19:33:14,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:14,984 INFO L225 Difference]: With dead ends: 86 [2021-12-14 19:33:14,984 INFO L226 Difference]: Without dead ends: 86 [2021-12-14 19:33:14,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=858, Invalid=3698, Unknown=0, NotChecked=0, Total=4556 [2021-12-14 19:33:14,984 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 165 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:14,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 403 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 19:33:14,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-14 19:33:14,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-12-14 19:33:14,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 83 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) [2021-12-14 19:33:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-12-14 19:33:14,986 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 78 [2021-12-14 19:33:14,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:14,986 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-12-14 19:33:14,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.875) internal successors, (217), 57 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:14,986 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-12-14 19:33:14,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-14 19:33:14,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:14,987 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:15,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-14 19:33:15,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-14 19:33:15,187 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:33:15,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:15,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1542890378, now seen corresponding path program 17 times [2021-12-14 19:33:15,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:15,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965356306] [2021-12-14 19:33:15,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:15,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 17 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:15,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:15,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965356306] [2021-12-14 19:33:15,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965356306] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:15,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908722181] [2021-12-14 19:33:15,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 19:33:15,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:15,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:15,765 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:15,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-14 19:33:16,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-14 19:33:16,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:33:16,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-14 19:33:16,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:16,189 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 10 treesize of output 8 [2021-12-14 19:33:16,541 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 14 treesize of output 10 [2021-12-14 19:33:16,629 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 17 treesize of output 19 [2021-12-14 19:33:16,674 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 16 treesize of output 18 [2021-12-14 19:33:16,697 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 16 treesize of output 18 [2021-12-14 19:33:16,714 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 16 treesize of output 18 [2021-12-14 19:33:16,731 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 16 treesize of output 18 [2021-12-14 19:33:16,754 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 16 treesize of output 18 [2021-12-14 19:33:16,771 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 16 treesize of output 18 [2021-12-14 19:33:16,785 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 16 treesize of output 18 [2021-12-14 19:33:16,815 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 [2021-12-14 19:33:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 17 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:16,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:16,834 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1406 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1406) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-14 19:33:16,839 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1406 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1406) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:33:16,856 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1406 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1406) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:33:16,867 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1406 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1406) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)))) is different from false [2021-12-14 19:33:16,877 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1406 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1406) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 5 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:33:16,886 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1406 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1406) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 6 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:33:16,933 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1406 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1406) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 7 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:33:16,943 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1406 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1406) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 8)) 0)) is different from false [2021-12-14 19:33:16,952 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1406 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_1406) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2021-12-14 19:33:16,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:33:16,956 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 23 treesize of output 24 [2021-12-14 19:33:16,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:33:16,960 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 37 treesize of output 37 [2021-12-14 19:33:16,962 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 11 treesize of output 7 [2021-12-14 19:33:17,206 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 17 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 135 not checked. [2021-12-14 19:33:17,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908722181] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:17,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:17,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 51 [2021-12-14 19:33:17,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604143845] [2021-12-14 19:33:17,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:17,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-14 19:33:17,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:17,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-14 19:33:17,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1621, Unknown=9, NotChecked=792, Total=2550 [2021-12-14 19:33:17,208 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 51 states, 51 states have (on average 3.235294117647059) internal successors, (165), 51 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) [2021-12-14 19:33:18,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:18,120 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions. [2021-12-14 19:33:18,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-14 19:33:18,120 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.235294117647059) internal successors, (165), 51 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-14 19:33:18,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:18,121 INFO L225 Difference]: With dead ends: 128 [2021-12-14 19:33:18,121 INFO L226 Difference]: Without dead ends: 91 [2021-12-14 19:33:18,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 141 SyntacticMatches, 11 SemanticMatches, 63 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=224, Invalid=2883, Unknown=9, NotChecked=1044, Total=4160 [2021-12-14 19:33:18,121 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 2438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 849 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:18,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 714 Invalid, 2438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1566 Invalid, 0 Unknown, 849 Unchecked, 0.5s Time] [2021-12-14 19:33:18,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-14 19:33:18,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2021-12-14 19:33:18,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 87 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:18,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2021-12-14 19:33:18,123 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 81 [2021-12-14 19:33:18,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:18,123 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2021-12-14 19:33:18,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.235294117647059) internal successors, (165), 51 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) [2021-12-14 19:33:18,123 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2021-12-14 19:33:18,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-14 19:33:18,123 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:18,123 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:18,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-14 19:33:18,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-14 19:33:18,324 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:33:18,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:18,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1345446643, now seen corresponding path program 18 times [2021-12-14 19:33:18,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:18,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422794595] [2021-12-14 19:33:18,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:18,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 120 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:18,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:18,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422794595] [2021-12-14 19:33:18,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422794595] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:18,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532647542] [2021-12-14 19:33:18,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 19:33:18,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:18,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:18,624 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:18,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-14 19:33:19,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-14 19:33:19,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:33:19,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-14 19:33:19,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 162 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:19,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:20,372 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 7 treesize of output 5 [2021-12-14 19:33:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 162 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:20,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532647542] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:20,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:20,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 57 [2021-12-14 19:33:20,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095759331] [2021-12-14 19:33:20,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:20,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-14 19:33:20,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:20,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-14 19:33:20,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=2800, Unknown=0, NotChecked=0, Total=3306 [2021-12-14 19:33:20,431 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 58 states, 57 states have (on average 3.6666666666666665) internal successors, (209), 58 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:20,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:20,927 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2021-12-14 19:33:20,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-14 19:33:20,928 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 3.6666666666666665) internal successors, (209), 58 states have internal predecessors, (209), 0 states have call successors, (0), 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 85 [2021-12-14 19:33:20,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:20,928 INFO L225 Difference]: With dead ends: 95 [2021-12-14 19:33:20,928 INFO L226 Difference]: Without dead ends: 95 [2021-12-14 19:33:20,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=965, Invalid=3865, Unknown=0, NotChecked=0, Total=4830 [2021-12-14 19:33:20,929 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 332 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:20,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 309 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:33:20,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-14 19:33:20,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2021-12-14 19:33:20,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 90 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:20,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2021-12-14 19:33:20,931 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 85 [2021-12-14 19:33:20,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:20,931 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2021-12-14 19:33:20,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 3.6666666666666665) internal successors, (209), 58 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:20,932 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2021-12-14 19:33:20,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-14 19:33:20,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:20,932 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:20,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-14 19:33:21,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-14 19:33:21,133 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:33:21,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:21,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1240827014, now seen corresponding path program 6 times [2021-12-14 19:33:21,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:21,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373021043] [2021-12-14 19:33:21,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:21,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:21,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 120 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:21,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:21,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373021043] [2021-12-14 19:33:21,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373021043] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:21,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948003124] [2021-12-14 19:33:21,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 19:33:21,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:21,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:21,431 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:21,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-14 19:33:22,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-14 19:33:22,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:33:22,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-14 19:33:22,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:22,252 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:33:22,252 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:33:22,261 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 10 treesize of output 8 [2021-12-14 19:33:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 162 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:23,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:24,616 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 190 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:24,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948003124] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:24,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:24,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 66 [2021-12-14 19:33:24,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063869115] [2021-12-14 19:33:24,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:24,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-14 19:33:24,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:24,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-14 19:33:24,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=3891, Unknown=0, NotChecked=0, Total=4422 [2021-12-14 19:33:24,618 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 67 states, 66 states have (on average 3.787878787878788) internal successors, (250), 67 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:25,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:25,858 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2021-12-14 19:33:25,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-14 19:33:25,859 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 3.787878787878788) internal successors, (250), 67 states have internal predecessors, (250), 0 states have call successors, (0), 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 86 [2021-12-14 19:33:25,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:25,859 INFO L225 Difference]: With dead ends: 93 [2021-12-14 19:33:25,859 INFO L226 Difference]: Without dead ends: 93 [2021-12-14 19:33:25,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 128 SyntacticMatches, 18 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2505 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1002, Invalid=7008, Unknown=0, NotChecked=0, Total=8010 [2021-12-14 19:33:25,860 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:25,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 402 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 462 Invalid, 0 Unknown, 130 Unchecked, 0.2s Time] [2021-12-14 19:33:25,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-14 19:33:25,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-12-14 19:33:25,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 91 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) [2021-12-14 19:33:25,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2021-12-14 19:33:25,862 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 86 [2021-12-14 19:33:25,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:25,863 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2021-12-14 19:33:25,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 3.787878787878788) internal successors, (250), 67 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:25,863 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2021-12-14 19:33:25,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-14 19:33:25,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:25,863 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:25,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-14 19:33:26,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-14 19:33:26,071 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:33:26,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:26,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1305948504, now seen corresponding path program 19 times [2021-12-14 19:33:26,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:26,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376602429] [2021-12-14 19:33:26,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:26,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 19 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:26,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:26,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376602429] [2021-12-14 19:33:26,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376602429] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:26,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810557388] [2021-12-14 19:33:26,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 19:33:26,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:26,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:26,593 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:26,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-14 19:33:26,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:26,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 113 conjunts are in the unsatisfiable core [2021-12-14 19:33:26,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:26,736 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 10 treesize of output 8 [2021-12-14 19:33:27,152 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 14 treesize of output 10 [2021-12-14 19:33:27,248 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 17 treesize of output 19 [2021-12-14 19:33:27,300 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 16 treesize of output 18 [2021-12-14 19:33:27,315 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 16 treesize of output 18 [2021-12-14 19:33:27,332 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 16 treesize of output 18 [2021-12-14 19:33:27,351 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 16 treesize of output 18 [2021-12-14 19:33:27,365 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 16 treesize of output 18 [2021-12-14 19:33:27,381 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 16 treesize of output 18 [2021-12-14 19:33:27,400 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 16 treesize of output 18 [2021-12-14 19:33:27,419 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 16 treesize of output 18 [2021-12-14 19:33:27,449 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 [2021-12-14 19:33:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 19 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:27,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:27,469 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1696 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1696) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-14 19:33:27,475 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1696 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1696) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:33:27,484 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1696 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1696) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:33:27,493 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1696 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1696) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-14 19:33:27,502 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1696 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1696) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 5 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:33:27,511 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1696 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1696) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 6 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:33:27,523 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1696 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1696) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 7 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)))) is different from false [2021-12-14 19:33:27,537 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1696 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1696) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 8)) 0)) is different from false [2021-12-14 19:33:27,546 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1696 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1696) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 9 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:33:27,555 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1696 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_1696) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 9 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2021-12-14 19:33:27,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:33:27,559 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 23 treesize of output 24 [2021-12-14 19:33:27,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:33:27,563 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 37 treesize of output 37 [2021-12-14 19:33:27,566 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 11 treesize of output 7 [2021-12-14 19:33:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 19 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 170 not checked. [2021-12-14 19:33:27,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810557388] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:27,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:27,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 55 [2021-12-14 19:33:27,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041508946] [2021-12-14 19:33:27,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:27,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-14 19:33:27,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:27,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-14 19:33:27,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1873, Unknown=10, NotChecked=950, Total=2970 [2021-12-14 19:33:27,831 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 55 states, 55 states have (on average 3.290909090909091) internal successors, (181), 55 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:28,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:28,967 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2021-12-14 19:33:28,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-14 19:33:28,968 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.290909090909091) internal successors, (181), 55 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-12-14 19:33:28,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:28,968 INFO L225 Difference]: With dead ends: 140 [2021-12-14 19:33:28,968 INFO L226 Difference]: Without dead ends: 99 [2021-12-14 19:33:28,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 156 SyntacticMatches, 12 SemanticMatches, 68 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=239, Invalid=3331, Unknown=10, NotChecked=1250, Total=4830 [2021-12-14 19:33:28,969 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 45 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 2989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 971 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:28,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 838 Invalid, 2989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2002 Invalid, 0 Unknown, 971 Unchecked, 0.6s Time] [2021-12-14 19:33:28,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-14 19:33:28,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2021-12-14 19:33:28,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 95 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:28,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2021-12-14 19:33:28,977 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 89 [2021-12-14 19:33:28,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:28,977 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2021-12-14 19:33:28,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.290909090909091) internal successors, (181), 55 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:28,978 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2021-12-14 19:33:28,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-14 19:33:28,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:28,978 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:28,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-14 19:33:29,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:29,187 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:33:29,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:29,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1987843371, now seen corresponding path program 20 times [2021-12-14 19:33:29,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:29,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323479598] [2021-12-14 19:33:29,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:29,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:29,555 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 153 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:29,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:29,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323479598] [2021-12-14 19:33:29,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323479598] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:29,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100338373] [2021-12-14 19:33:29,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:33:29,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:29,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:29,557 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:29,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-14 19:33:29,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:33:29,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:33:29,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-14 19:33:29,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 190 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:30,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:30,508 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 [2021-12-14 19:33:30,585 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 190 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:30,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100338373] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:30,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:30,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 53 [2021-12-14 19:33:30,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700676561] [2021-12-14 19:33:30,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:30,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-14 19:33:30,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:30,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-14 19:33:30,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=2499, Unknown=0, NotChecked=0, Total=2862 [2021-12-14 19:33:30,587 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 54 states, 53 states have (on average 3.547169811320755) internal successors, (188), 54 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:31,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:31,244 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2021-12-14 19:33:31,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-14 19:33:31,245 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 3.547169811320755) internal successors, (188), 54 states have internal predecessors, (188), 0 states have call successors, (0), 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 93 [2021-12-14 19:33:31,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:31,245 INFO L225 Difference]: With dead ends: 103 [2021-12-14 19:33:31,245 INFO L226 Difference]: Without dead ends: 103 [2021-12-14 19:33:31,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=831, Invalid=3591, Unknown=0, NotChecked=0, Total=4422 [2021-12-14 19:33:31,246 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 424 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:31,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 478 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 19:33:31,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-14 19:33:31,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2021-12-14 19:33:31,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 98 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:31,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2021-12-14 19:33:31,248 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 93 [2021-12-14 19:33:31,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:31,248 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2021-12-14 19:33:31,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 3.547169811320755) internal successors, (188), 54 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:31,248 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2021-12-14 19:33:31,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-14 19:33:31,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:31,249 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:31,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-14 19:33:31,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-12-14 19:33:31,469 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:33:31,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:31,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1493602344, now seen corresponding path program 7 times [2021-12-14 19:33:31,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:31,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017850685] [2021-12-14 19:33:31,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:31,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:31,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 153 proven. 278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:31,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:31,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017850685] [2021-12-14 19:33:31,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017850685] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:31,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722628430] [2021-12-14 19:33:31,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 19:33:31,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:31,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:31,797 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:31,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-14 19:33:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:31,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-14 19:33:31,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:31,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:33:31,961 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 9 treesize of output 11 [2021-12-14 19:33:31,964 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 10 treesize of output 8 [2021-12-14 19:33:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 190 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:32,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 231 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:33,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722628430] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:33,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:33,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 71 [2021-12-14 19:33:33,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027459435] [2021-12-14 19:33:33,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:33,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-14 19:33:33,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:33,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-14 19:33:33,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=4512, Unknown=0, NotChecked=0, Total=5112 [2021-12-14 19:33:33,861 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 72 states, 71 states have (on average 3.8450704225352115) internal successors, (273), 72 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:34,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:34,971 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2021-12-14 19:33:34,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-14 19:33:34,972 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 3.8450704225352115) internal successors, (273), 72 states have internal predecessors, (273), 0 states have call successors, (0), 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 94 [2021-12-14 19:33:34,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:34,972 INFO L225 Difference]: With dead ends: 102 [2021-12-14 19:33:34,972 INFO L226 Difference]: Without dead ends: 102 [2021-12-14 19:33:34,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2009 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1574, Invalid=7356, Unknown=0, NotChecked=0, Total=8930 [2021-12-14 19:33:34,973 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 239 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:34,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 502 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1397 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 19:33:34,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-14 19:33:34,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2021-12-14 19:33:34,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 98 states have (on average 1.030612244897959) internal successors, (101), 99 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:34,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2021-12-14 19:33:34,975 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 94 [2021-12-14 19:33:34,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:34,975 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2021-12-14 19:33:34,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 3.8450704225352115) internal successors, (273), 72 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:34,975 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2021-12-14 19:33:34,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-14 19:33:34,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:34,975 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:34,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-14 19:33:35,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:35,185 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:33:35,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:35,185 INFO L85 PathProgramCache]: Analyzing trace with hash 46237638, now seen corresponding path program 21 times [2021-12-14 19:33:35,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:35,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500028373] [2021-12-14 19:33:35,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:35,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 21 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:35,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:35,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500028373] [2021-12-14 19:33:35,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500028373] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:35,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601630142] [2021-12-14 19:33:35,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 19:33:35,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:35,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:35,719 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:35,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-14 19:33:36,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-14 19:33:36,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:33:36,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 126 conjunts are in the unsatisfiable core [2021-12-14 19:33:36,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:36,568 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 10 treesize of output 8 [2021-12-14 19:33:37,019 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 14 treesize of output 10 [2021-12-14 19:33:37,117 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 17 treesize of output 19 [2021-12-14 19:33:37,157 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 16 treesize of output 18 [2021-12-14 19:33:37,175 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 16 treesize of output 18 [2021-12-14 19:33:37,191 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 16 treesize of output 18 [2021-12-14 19:33:37,207 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 16 treesize of output 18 [2021-12-14 19:33:37,223 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 16 treesize of output 18 [2021-12-14 19:33:37,238 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 16 treesize of output 18 [2021-12-14 19:33:37,253 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 16 treesize of output 18 [2021-12-14 19:33:37,283 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 16 treesize of output 18 [2021-12-14 19:33:37,300 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 16 treesize of output 18 [2021-12-14 19:33:37,310 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 [2021-12-14 19:33:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 21 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:37,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:37,352 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2012 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2012) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-14 19:33:37,358 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2012 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2012) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)))) is different from false [2021-12-14 19:33:37,373 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2012 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2012) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:33:37,381 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2012 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2012) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-14 19:33:37,390 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2012 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2012) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 5 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:33:37,398 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2012 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2012) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 6 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:33:37,407 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2012 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2012) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 7 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:33:37,415 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2012 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2012) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 8)) 0)) is different from false [2021-12-14 19:33:37,425 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2012 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2012) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 9 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-14 19:33:37,433 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2012 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2012) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 10)) 0)) is different from false [2021-12-14 19:33:37,442 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2012 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_2012) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 10)))) is different from false [2021-12-14 19:33:37,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:33:37,446 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 23 treesize of output 24 [2021-12-14 19:33:37,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:33:37,450 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 37 treesize of output 37 [2021-12-14 19:33:37,452 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 11 treesize of output 7 [2021-12-14 19:33:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 21 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 209 not checked. [2021-12-14 19:33:37,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601630142] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:37,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:37,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 30] total 59 [2021-12-14 19:33:37,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010598713] [2021-12-14 19:33:37,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:37,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-14 19:33:37,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:37,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-14 19:33:37,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2143, Unknown=11, NotChecked=1122, Total=3422 [2021-12-14 19:33:37,730 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 59 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 59 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:38,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:38,983 INFO L93 Difference]: Finished difference Result 152 states and 153 transitions. [2021-12-14 19:33:38,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-14 19:33:38,983 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 59 states have internal predecessors, (196), 0 states have call successors, (0), 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 97 [2021-12-14 19:33:38,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:38,983 INFO L225 Difference]: With dead ends: 152 [2021-12-14 19:33:38,984 INFO L226 Difference]: Without dead ends: 107 [2021-12-14 19:33:38,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 171 SyntacticMatches, 13 SemanticMatches, 73 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=254, Invalid=3811, Unknown=11, NotChecked=1474, Total=5550 [2021-12-14 19:33:38,984 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 74 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 2258 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 3373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1087 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:38,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 945 Invalid, 3373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2258 Invalid, 0 Unknown, 1087 Unchecked, 0.7s Time] [2021-12-14 19:33:38,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-14 19:33:38,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2021-12-14 19:33:38,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 103 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:38,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2021-12-14 19:33:38,986 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 97 [2021-12-14 19:33:38,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:38,986 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2021-12-14 19:33:38,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 59 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:38,986 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2021-12-14 19:33:38,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 19:33:38,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:38,987 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:39,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-14 19:33:39,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:39,191 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:33:39,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:33:39,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1500748617, now seen corresponding path program 22 times [2021-12-14 19:33:39,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:33:39,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718398609] [2021-12-14 19:33:39,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:33:39,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:33:39,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:33:39,566 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 190 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:39,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:33:39,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718398609] [2021-12-14 19:33:39,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718398609] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:33:39,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463048850] [2021-12-14 19:33:39,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 19:33:39,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:33:39,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:33:39,568 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:33:39,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-14 19:33:39,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 19:33:39,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:33:39,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-14 19:33:39,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:33:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 242 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:40,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:33:40,624 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 7 treesize of output 5 [2021-12-14 19:33:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 242 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:33:40,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463048850] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:33:40,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:33:40,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 56 [2021-12-14 19:33:40,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948843432] [2021-12-14 19:33:40,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:33:40,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-14 19:33:40,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:33:40,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-14 19:33:40,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=2778, Unknown=0, NotChecked=0, Total=3192 [2021-12-14 19:33:40,701 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 57 states, 56 states have (on average 3.7142857142857144) internal successors, (208), 57 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:41,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:33:41,480 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2021-12-14 19:33:41,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-14 19:33:41,481 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.7142857142857144) internal successors, (208), 57 states have internal predecessors, (208), 0 states have call successors, (0), 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 101 [2021-12-14 19:33:41,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:33:41,481 INFO L225 Difference]: With dead ends: 111 [2021-12-14 19:33:41,481 INFO L226 Difference]: Without dead ends: 111 [2021-12-14 19:33:41,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=939, Invalid=4031, Unknown=0, NotChecked=0, Total=4970 [2021-12-14 19:33:41,483 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 456 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 1545 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 19:33:41,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 565 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1545 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 19:33:41,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-14 19:33:41,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-12-14 19:33:41,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 106 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:41,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2021-12-14 19:33:41,485 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 101 [2021-12-14 19:33:41,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:33:41,485 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2021-12-14 19:33:41,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.7142857142857144) internal successors, (208), 57 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:33:41,486 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2021-12-14 19:33:41,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-14 19:33:41,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:33:41,486 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:33:41,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0