./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 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/termination-crafted/LexIndexValue-Pointer-3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-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 64bit --witnessprinter.graph.data.programhash 29e5ebbacca85d2fb1b0bd6d164adabb3234eca085536ff1d3458c8110967632 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 00:01:19,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 00:01:19,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 00:01:19,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 00:01:19,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 00:01:19,545 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 00:01:19,546 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 00:01:19,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 00:01:19,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 00:01:19,549 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 00:01:19,550 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 00:01:19,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 00:01:19,551 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 00:01:19,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 00:01:19,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 00:01:19,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 00:01:19,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 00:01:19,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 00:01:19,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 00:01:19,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 00:01:19,557 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 00:01:19,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 00:01:19,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 00:01:19,559 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 00:01:19,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 00:01:19,561 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 00:01:19,562 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 00:01:19,562 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 00:01:19,562 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 00:01:19,563 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 00:01:19,563 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 00:01:19,564 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 00:01:19,564 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 00:01:19,565 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 00:01:19,565 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 00:01:19,566 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 00:01:19,566 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 00:01:19,566 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 00:01:19,566 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 00:01:19,567 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 00:01:19,568 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 00:01:19,577 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2021-12-22 00:01:19,601 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 00:01:19,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 00:01:19,603 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 00:01:19,603 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 00:01:19,603 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 00:01:19,604 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 00:01:19,604 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 00:01:19,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 00:01:19,604 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 00:01:19,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 00:01:19,605 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 00:01:19,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 00:01:19,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 00:01:19,605 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 00:01:19,606 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 00:01:19,606 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 00:01:19,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 00:01:19,606 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 00:01:19,606 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 00:01:19,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 00:01:19,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 00:01:19,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 00:01:19,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:01:19,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 00:01:19,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 00:01:19,607 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 00:01:19,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 00:01:19,607 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 00:01:19,608 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29e5ebbacca85d2fb1b0bd6d164adabb3234eca085536ff1d3458c8110967632 [2021-12-22 00:01:19,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 00:01:19,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 00:01:19,789 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 00:01:19,790 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 00:01:19,801 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 00:01:19,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c [2021-12-22 00:01:19,847 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bd3e0312/859fbacb53624eaab9483a0d1ce95ef6/FLAG6b723bed5 [2021-12-22 00:01:20,172 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 00:01:20,172 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-3.c [2021-12-22 00:01:20,177 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bd3e0312/859fbacb53624eaab9483a0d1ce95ef6/FLAG6b723bed5 [2021-12-22 00:01:20,618 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bd3e0312/859fbacb53624eaab9483a0d1ce95ef6 [2021-12-22 00:01:20,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 00:01:20,622 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 00:01:20,624 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 00:01:20,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 00:01:20,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 00:01:20,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:01:20" (1/1) ... [2021-12-22 00:01:20,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d4739d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:20, skipping insertion in model container [2021-12-22 00:01:20,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:01:20" (1/1) ... [2021-12-22 00:01:20,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 00:01:20,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 00:01:20,819 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:01:20,845 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 00:01:20,879 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:01:20,890 INFO L208 MainTranslator]: Completed translation [2021-12-22 00:01:20,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:20 WrapperNode [2021-12-22 00:01:20,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 00:01:20,904 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 00:01:20,904 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 00:01:20,904 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 00:01:20,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:20" (1/1) ... [2021-12-22 00:01:20,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:20" (1/1) ... [2021-12-22 00:01:20,960 INFO L137 Inliner]: procedures = 10, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2021-12-22 00:01:20,961 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 00:01:20,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 00:01:20,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 00:01:20,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 00:01:20,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:20" (1/1) ... [2021-12-22 00:01:20,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:20" (1/1) ... [2021-12-22 00:01:20,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:20" (1/1) ... [2021-12-22 00:01:20,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:20" (1/1) ... [2021-12-22 00:01:21,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:20" (1/1) ... [2021-12-22 00:01:21,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:20" (1/1) ... [2021-12-22 00:01:21,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:20" (1/1) ... [2021-12-22 00:01:21,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 00:01:21,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 00:01:21,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 00:01:21,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 00:01:21,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:20" (1/1) ... [2021-12-22 00:01:21,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:01:21,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:21,069 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) [2021-12-22 00:01:21,072 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 [2021-12-22 00:01:21,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 00:01:21,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 00:01:21,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 00:01:21,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 00:01:21,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 00:01:21,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 00:01:21,186 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 00:01:21,188 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 00:01:21,423 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 00:01:21,439 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 00:01:21,440 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 00:01:21,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:01:21 BoogieIcfgContainer [2021-12-22 00:01:21,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 00:01:21,443 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 00:01:21,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 00:01:21,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 00:01:21,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:01:20" (1/3) ... [2021-12-22 00:01:21,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b0bbf9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:01:21, skipping insertion in model container [2021-12-22 00:01:21,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:01:20" (2/3) ... [2021-12-22 00:01:21,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b0bbf9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:01:21, skipping insertion in model container [2021-12-22 00:01:21,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:01:21" (3/3) ... [2021-12-22 00:01:21,469 INFO L111 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-3.c [2021-12-22 00:01:21,473 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 00:01:21,478 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2021-12-22 00:01:21,570 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 00:01:21,593 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 [2021-12-22 00:01:21,602 INFO L340 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2021-12-22 00:01:21,633 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.894736842105263) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:21,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-22 00:01:21,655 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:21,656 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-22 00:01:21,656 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:21,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:21,683 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2021-12-22 00:01:21,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:21,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104292811] [2021-12-22 00:01:21,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:21,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:21,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:21,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104292811] [2021-12-22 00:01:21,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104292811] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:01:21,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:01:21,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:01:21,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023153060] [2021-12-22 00:01:21,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:01:21,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:01:21,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:22,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:01:22,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:01:22,034 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.894736842105263) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:22,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:22,094 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-12-22 00:01:22,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:01:22,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-12-22 00:01:22,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:22,101 INFO L225 Difference]: With dead ends: 30 [2021-12-22 00:01:22,102 INFO L226 Difference]: Without dead ends: 28 [2021-12-22 00:01:22,120 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 [2021-12-22 00:01:22,126 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:22,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 19 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:01:22,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-22 00:01:22,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-22 00:01:22,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 27 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) [2021-12-22 00:01:22,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-12-22 00:01:22,176 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 4 [2021-12-22 00:01:22,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:22,184 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-12-22 00:01:22,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:22,185 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-12-22 00:01:22,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-22 00:01:22,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:22,185 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-22 00:01:22,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 00:01:22,186 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:22,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:22,190 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2021-12-22 00:01:22,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:22,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056391244] [2021-12-22 00:01:22,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:22,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:22,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:22,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:22,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056391244] [2021-12-22 00:01:22,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056391244] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:01:22,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:01:22,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:01:22,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670794768] [2021-12-22 00:01:22,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:01:22,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:01:22,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:22,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:01:22,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:01:22,305 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:22,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:22,351 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-12-22 00:01:22,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:01:22,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-12-22 00:01:22,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:22,354 INFO L225 Difference]: With dead ends: 32 [2021-12-22 00:01:22,354 INFO L226 Difference]: Without dead ends: 32 [2021-12-22 00:01:22,355 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 [2021-12-22 00:01:22,359 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:22,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 37 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:01:22,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-22 00:01:22,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-12-22 00:01:22,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.6) internal successors, (32), 29 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) [2021-12-22 00:01:22,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-12-22 00:01:22,384 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 4 [2021-12-22 00:01:22,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:22,385 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-12-22 00:01:22,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:22,385 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-12-22 00:01:22,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 00:01:22,386 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:22,386 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:22,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 00:01:22,386 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:22,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:22,387 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2021-12-22 00:01:22,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:22,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147971618] [2021-12-22 00:01:22,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:22,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:22,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:22,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147971618] [2021-12-22 00:01:22,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147971618] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:22,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514024311] [2021-12-22 00:01:22,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:22,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:22,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:22,556 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) [2021-12-22 00:01:22,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 00:01:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:22,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 00:01:22,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:01:22,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:01:22,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:22,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:01:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:22,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514024311] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:01:22,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:01:22,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2021-12-22 00:01:22,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111250663] [2021-12-22 00:01:22,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:01:22,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 00:01:22,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:22,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 00:01:22,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-22 00:01:22,962 INFO L87 Difference]: Start difference. First operand 30 states and 32 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) [2021-12-22 00:01:23,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:23,054 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-12-22 00:01:23,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 00:01:23,055 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 8 [2021-12-22 00:01:23,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:23,055 INFO L225 Difference]: With dead ends: 39 [2021-12-22 00:01:23,056 INFO L226 Difference]: Without dead ends: 39 [2021-12-22 00:01:23,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-12-22 00:01:23,057 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:23,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 62 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:01:23,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-22 00:01:23,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-22 00:01:23,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 38 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) [2021-12-22 00:01:23,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-12-22 00:01:23,060 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 8 [2021-12-22 00:01:23,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:23,061 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-12-22 00:01:23,061 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) [2021-12-22 00:01:23,061 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-12-22 00:01:23,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-22 00:01:23,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:23,062 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-12-22 00:01:23,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 00:01:23,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:23,276 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:23,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:23,277 INFO L85 PathProgramCache]: Analyzing trace with hash 519338591, now seen corresponding path program 1 times [2021-12-22 00:01:23,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:23,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634860828] [2021-12-22 00:01:23,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:23,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:23,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-22 00:01:23,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:23,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634860828] [2021-12-22 00:01:23,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634860828] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:01:23,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:01:23,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:01:23,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112658568] [2021-12-22 00:01:23,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:01:23,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:01:23,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:23,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:01:23,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:01:23,351 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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) [2021-12-22 00:01:23,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:23,373 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-12-22 00:01:23,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:01:23,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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 21 [2021-12-22 00:01:23,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:23,375 INFO L225 Difference]: With dead ends: 36 [2021-12-22 00:01:23,375 INFO L226 Difference]: Without dead ends: 36 [2021-12-22 00:01:23,375 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 [2021-12-22 00:01:23,376 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:23,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 15 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:01:23,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-22 00:01:23,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-12-22 00:01:23,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 35 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) [2021-12-22 00:01:23,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-12-22 00:01:23,379 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 21 [2021-12-22 00:01:23,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:23,379 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-12-22 00:01:23,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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) [2021-12-22 00:01:23,379 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-12-22 00:01:23,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-22 00:01:23,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:23,380 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-12-22 00:01:23,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 00:01:23,380 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:23,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:23,381 INFO L85 PathProgramCache]: Analyzing trace with hash 519338592, now seen corresponding path program 1 times [2021-12-22 00:01:23,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:23,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385168801] [2021-12-22 00:01:23,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:23,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:23,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:23,427 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:23,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:23,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385168801] [2021-12-22 00:01:23,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385168801] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:23,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459471328] [2021-12-22 00:01:23,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:23,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:23,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:23,444 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) [2021-12-22 00:01:23,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 00:01:23,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:23,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 00:01:23,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:01:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:23,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:01:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:23,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459471328] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:01:23,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:01:23,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-22 00:01:23,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872048776] [2021-12-22 00:01:23,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:01:23,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 00:01:23,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:23,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 00:01:23,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-22 00:01:23,620 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) [2021-12-22 00:01:23,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:23,652 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-12-22 00:01:23,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 00:01:23,652 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 [2021-12-22 00:01:23,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:23,653 INFO L225 Difference]: With dead ends: 60 [2021-12-22 00:01:23,653 INFO L226 Difference]: Without dead ends: 60 [2021-12-22 00:01:23,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-22 00:01:23,654 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:23,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 88 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:01:23,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-22 00:01:23,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-22 00:01:23,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:23,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-12-22 00:01:23,659 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 21 [2021-12-22 00:01:23,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:23,659 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-12-22 00:01:23,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) [2021-12-22 00:01:23,660 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-12-22 00:01:23,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 00:01:23,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:23,661 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1] [2021-12-22 00:01:23,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 00:01:23,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:23,879 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:23,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:23,880 INFO L85 PathProgramCache]: Analyzing trace with hash 649821198, now seen corresponding path program 2 times [2021-12-22 00:01:23,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:23,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734178824] [2021-12-22 00:01:23,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:23,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:24,002 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:24,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:24,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734178824] [2021-12-22 00:01:24,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734178824] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:24,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329373584] [2021-12-22 00:01:24,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 00:01:24,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:24,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:24,024 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) [2021-12-22 00:01:24,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 00:01:24,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 00:01:24,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 00:01:24,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 00:01:24,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:01:24,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:01:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-22 00:01:24,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:01:24,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329373584] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:01:24,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 00:01:24,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2021-12-22 00:01:24,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725818546] [2021-12-22 00:01:24,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:01:24,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:01:24,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:24,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:01:24,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-12-22 00:01:24,339 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:24,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:24,373 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2021-12-22 00:01:24,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:01:24,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-22 00:01:24,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:24,374 INFO L225 Difference]: With dead ends: 73 [2021-12-22 00:01:24,374 INFO L226 Difference]: Without dead ends: 73 [2021-12-22 00:01:24,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-12-22 00:01:24,375 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:24,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 20 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:01:24,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-22 00:01:24,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2021-12-22 00:01:24,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 66 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:24,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2021-12-22 00:01:24,379 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 45 [2021-12-22 00:01:24,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:24,379 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2021-12-22 00:01:24,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:24,379 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2021-12-22 00:01:24,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 00:01:24,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:24,380 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:24,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 00:01:24,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:24,595 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:24,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:24,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1405678828, now seen corresponding path program 1 times [2021-12-22 00:01:24,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:24,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178826990] [2021-12-22 00:01:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:24,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:24,698 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 00:01:24,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:24,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178826990] [2021-12-22 00:01:24,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178826990] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:24,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261955250] [2021-12-22 00:01:24,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:24,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:24,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:24,700 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) [2021-12-22 00:01:24,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 00:01:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:24,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 00:01:24,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:01:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 00:01:24,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:01:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 00:01:25,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261955250] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:01:25,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:01:25,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-22 00:01:25,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454495525] [2021-12-22 00:01:25,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:01:25,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 00:01:25,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:25,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 00:01:25,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-22 00:01:25,070 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 25 states, 25 states have (on average 3.8) internal successors, (95), 25 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:25,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:25,176 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2021-12-22 00:01:25,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 00:01:25,181 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.8) internal successors, (95), 25 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-22 00:01:25,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:25,182 INFO L225 Difference]: With dead ends: 115 [2021-12-22 00:01:25,182 INFO L226 Difference]: Without dead ends: 115 [2021-12-22 00:01:25,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-22 00:01:25,183 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 66 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:25,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 82 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:01:25,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-22 00:01:25,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-12-22 00:01:25,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.0818181818181818) internal successors, (119), 114 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:25,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2021-12-22 00:01:25,194 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 48 [2021-12-22 00:01:25,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:25,195 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2021-12-22 00:01:25,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.8) internal successors, (95), 25 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:25,196 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2021-12-22 00:01:25,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-22 00:01:25,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:25,200 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:25,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 00:01:25,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:25,417 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:25,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:25,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1050107376, now seen corresponding path program 2 times [2021-12-22 00:01:25,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:25,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176017962] [2021-12-22 00:01:25,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:25,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:25,807 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 00:01:25,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:25,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176017962] [2021-12-22 00:01:25,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176017962] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:25,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683046783] [2021-12-22 00:01:25,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 00:01:25,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:25,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:25,810 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) [2021-12-22 00:01:25,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 00:01:25,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 00:01:25,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 00:01:25,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 00:01:25,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:01:26,055 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 00:01:26,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:01:26,772 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 00:01:26,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683046783] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:01:26,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:01:26,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-22 00:01:26,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003127688] [2021-12-22 00:01:26,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:01:26,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-22 00:01:26,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:26,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-22 00:01:26,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-22 00:01:26,774 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 49 states, 49 states have (on average 3.8979591836734695) internal successors, (191), 49 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:26,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:26,922 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2021-12-22 00:01:26,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-22 00:01:26,922 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.8979591836734695) internal successors, (191), 49 states have internal predecessors, (191), 0 states have call successors, (0), 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 96 [2021-12-22 00:01:26,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:26,923 INFO L225 Difference]: With dead ends: 211 [2021-12-22 00:01:26,924 INFO L226 Difference]: Without dead ends: 211 [2021-12-22 00:01:26,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-22 00:01:26,925 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 207 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:26,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 124 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:01:26,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-12-22 00:01:26,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2021-12-22 00:01:26,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0436893203883495) internal successors, (215), 210 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:26,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 215 transitions. [2021-12-22 00:01:26,933 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 215 transitions. Word has length 96 [2021-12-22 00:01:26,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:26,933 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 215 transitions. [2021-12-22 00:01:26,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.8979591836734695) internal successors, (191), 49 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:26,933 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 215 transitions. [2021-12-22 00:01:26,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-22 00:01:26,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:26,936 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:26,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-22 00:01:27,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:27,166 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:27,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:27,167 INFO L85 PathProgramCache]: Analyzing trace with hash -17107880, now seen corresponding path program 3 times [2021-12-22 00:01:27,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:27,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190775071] [2021-12-22 00:01:27,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:27,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 00:01:28,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:28,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190775071] [2021-12-22 00:01:28,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190775071] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:28,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723783222] [2021-12-22 00:01:28,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 00:01:28,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:28,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:28,084 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) [2021-12-22 00:01:28,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 00:01:28,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 00:01:28,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 00:01:28,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 00:01:28,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:01:28,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 00:01:29,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2021-12-22 00:01:29,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:01:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2021-12-22 00:01:29,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723783222] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:01:29,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:01:29,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 5, 5] total 57 [2021-12-22 00:01:29,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776687336] [2021-12-22 00:01:29,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:01:29,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-22 00:01:29,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:29,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-22 00:01:29,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1202, Invalid=1990, Unknown=0, NotChecked=0, Total=3192 [2021-12-22 00:01:29,969 INFO L87 Difference]: Start difference. First operand 211 states and 215 transitions. Second operand has 57 states, 57 states have (on average 3.754385964912281) internal successors, (214), 57 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:32,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:32,035 INFO L93 Difference]: Finished difference Result 250 states and 255 transitions. [2021-12-22 00:01:32,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-22 00:01:32,036 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.754385964912281) internal successors, (214), 57 states have internal predecessors, (214), 0 states have call successors, (0), 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 192 [2021-12-22 00:01:32,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:32,037 INFO L225 Difference]: With dead ends: 250 [2021-12-22 00:01:32,037 INFO L226 Difference]: Without dead ends: 250 [2021-12-22 00:01:32,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1752 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3640, Invalid=8132, Unknown=0, NotChecked=0, Total=11772 [2021-12-22 00:01:32,040 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 341 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:32,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 119 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 00:01:32,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-22 00:01:32,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 228. [2021-12-22 00:01:32,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 225 states have (on average 1.048888888888889) internal successors, (236), 227 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:32,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 236 transitions. [2021-12-22 00:01:32,056 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 236 transitions. Word has length 192 [2021-12-22 00:01:32,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:32,056 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 236 transitions. [2021-12-22 00:01:32,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.754385964912281) internal successors, (214), 57 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:32,056 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 236 transitions. [2021-12-22 00:01:32,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-22 00:01:32,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:32,060 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:32,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 00:01:32,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:32,280 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:32,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:32,281 INFO L85 PathProgramCache]: Analyzing trace with hash 602519778, now seen corresponding path program 1 times [2021-12-22 00:01:32,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:32,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182444318] [2021-12-22 00:01:32,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:32,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:32,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2021-12-22 00:01:32,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:32,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182444318] [2021-12-22 00:01:32,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182444318] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:01:32,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:01:32,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:01:32,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020699046] [2021-12-22 00:01:32,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:01:32,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:01:32,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:32,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:01:32,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:01:32,397 INFO L87 Difference]: Start difference. First operand 228 states and 236 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:32,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:32,403 INFO L93 Difference]: Finished difference Result 227 states and 235 transitions. [2021-12-22 00:01:32,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:01:32,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2021-12-22 00:01:32,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:32,405 INFO L225 Difference]: With dead ends: 227 [2021-12-22 00:01:32,405 INFO L226 Difference]: Without dead ends: 227 [2021-12-22 00:01:32,406 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 [2021-12-22 00:01:32,406 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:32,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 16 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:01:32,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-22 00:01:32,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2021-12-22 00:01:32,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 225 states have (on average 1.0444444444444445) internal successors, (235), 226 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:32,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 235 transitions. [2021-12-22 00:01:32,423 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 235 transitions. Word has length 196 [2021-12-22 00:01:32,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:32,424 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 235 transitions. [2021-12-22 00:01:32,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:32,424 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 235 transitions. [2021-12-22 00:01:32,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-22 00:01:32,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:32,426 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:32,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 00:01:32,426 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:32,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:32,427 INFO L85 PathProgramCache]: Analyzing trace with hash -799075579, now seen corresponding path program 1 times [2021-12-22 00:01:32,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:32,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788828453] [2021-12-22 00:01:32,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:32,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:33,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:33,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788828453] [2021-12-22 00:01:33,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788828453] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:33,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890593298] [2021-12-22 00:01:33,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:33,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:33,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:33,362 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) [2021-12-22 00:01:33,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 00:01:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:33,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-22 00:01:33,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:01:34,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:34,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:01:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:36,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890593298] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:01:36,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:01:36,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2021-12-22 00:01:36,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259744867] [2021-12-22 00:01:36,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:01:36,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-22 00:01:36,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:36,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-22 00:01:36,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-12-22 00:01:36,432 INFO L87 Difference]: Start difference. First operand 227 states and 235 transitions. Second operand has 99 states, 99 states have (on average 3.9696969696969697) internal successors, (393), 99 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:36,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:36,829 INFO L93 Difference]: Finished difference Result 423 states and 431 transitions. [2021-12-22 00:01:36,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-22 00:01:36,830 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 3.9696969696969697) internal successors, (393), 99 states have internal predecessors, (393), 0 states have call successors, (0), 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 198 [2021-12-22 00:01:36,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:36,831 INFO L225 Difference]: With dead ends: 423 [2021-12-22 00:01:36,831 INFO L226 Difference]: Without dead ends: 423 [2021-12-22 00:01:36,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-12-22 00:01:36,833 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 288 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:36,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 211 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 00:01:36,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-12-22 00:01:36,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2021-12-22 00:01:36,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 421 states have (on average 1.0237529691211402) internal successors, (431), 422 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:36,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 431 transitions. [2021-12-22 00:01:36,838 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 431 transitions. Word has length 198 [2021-12-22 00:01:36,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:36,838 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 431 transitions. [2021-12-22 00:01:36,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 3.9696969696969697) internal successors, (393), 99 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:36,839 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 431 transitions. [2021-12-22 00:01:36,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2021-12-22 00:01:36,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:36,842 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:36,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-22 00:01:37,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:37,060 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:37,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:37,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1623122088, now seen corresponding path program 2 times [2021-12-22 00:01:37,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:37,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702169431] [2021-12-22 00:01:37,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:37,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:01:39,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:39,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702169431] [2021-12-22 00:01:39,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702169431] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:39,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477380326] [2021-12-22 00:01:39,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 00:01:39,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:39,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:39,822 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) [2021-12-22 00:01:39,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 00:01:40,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 00:01:40,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 00:01:40,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 00:01:40,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:01:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18336 trivial. 0 not checked. [2021-12-22 00:01:42,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:01:42,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477380326] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:01:42,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 00:01:42,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [99] total 101 [2021-12-22 00:01:42,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835645103] [2021-12-22 00:01:42,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:01:42,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:01:42,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:42,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:01:42,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4855, Invalid=5245, Unknown=0, NotChecked=0, Total=10100 [2021-12-22 00:01:42,014 INFO L87 Difference]: Start difference. First operand 423 states and 431 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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) [2021-12-22 00:01:42,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:42,016 INFO L93 Difference]: Finished difference Result 429 states and 437 transitions. [2021-12-22 00:01:42,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:01:42,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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 394 [2021-12-22 00:01:42,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:42,017 INFO L225 Difference]: With dead ends: 429 [2021-12-22 00:01:42,017 INFO L226 Difference]: Without dead ends: 425 [2021-12-22 00:01:42,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4855, Invalid=5245, Unknown=0, NotChecked=0, Total=10100 [2021-12-22 00:01:42,019 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:42,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 16 Unchecked, 0.0s Time] [2021-12-22 00:01:42,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-12-22 00:01:42,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2021-12-22 00:01:42,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 423 states have (on average 1.0236406619385343) internal successors, (433), 424 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 433 transitions. [2021-12-22 00:01:42,024 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 433 transitions. Word has length 394 [2021-12-22 00:01:42,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:42,025 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 433 transitions. [2021-12-22 00:01:42,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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) [2021-12-22 00:01:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 433 transitions. [2021-12-22 00:01:42,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2021-12-22 00:01:42,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:42,028 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:42,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 00:01:42,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-22 00:01:42,244 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:42,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:42,244 INFO L85 PathProgramCache]: Analyzing trace with hash -342671882, now seen corresponding path program 1 times [2021-12-22 00:01:42,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:42,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201825112] [2021-12-22 00:01:42,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:42,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:45,223 INFO L134 CoverageAnalysis]: Checked inductivity of 18338 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 00:01:45,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:01:45,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201825112] [2021-12-22 00:01:45,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201825112] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:01:45,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543381700] [2021-12-22 00:01:45,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:45,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:01:45,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:01:45,230 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) [2021-12-22 00:01:45,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 00:01:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:01:45,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 1407 conjuncts, 98 conjunts are in the unsatisfiable core [2021-12-22 00:01:45,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:01:46,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18338 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 00:01:46,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:01:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 18338 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 00:01:54,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543381700] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 00:01:54,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 00:01:54,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 197 [2021-12-22 00:01:54,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959397493] [2021-12-22 00:01:54,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 00:01:54,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2021-12-22 00:01:54,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:01:54,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2021-12-22 00:01:54,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2021-12-22 00:01:54,585 INFO L87 Difference]: Start difference. First operand 425 states and 433 transitions. Second operand has 197 states, 197 states have (on average 3.99492385786802) internal successors, (787), 197 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:55,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:01:55,817 INFO L93 Difference]: Finished difference Result 817 states and 825 transitions. [2021-12-22 00:01:55,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-12-22 00:01:55,818 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 3.99492385786802) internal successors, (787), 197 states have internal predecessors, (787), 0 states have call successors, (0), 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 397 [2021-12-22 00:01:55,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:01:55,820 INFO L225 Difference]: With dead ends: 817 [2021-12-22 00:01:55,821 INFO L226 Difference]: Without dead ends: 817 [2021-12-22 00:01:55,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 696 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2021-12-22 00:01:55,823 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 873 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 00:01:55,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [873 Valid, 324 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 00:01:55,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-12-22 00:01:55,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 817. [2021-12-22 00:01:55,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 815 states have (on average 1.0122699386503067) internal successors, (825), 816 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:55,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 825 transitions. [2021-12-22 00:01:55,831 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 825 transitions. Word has length 397 [2021-12-22 00:01:55,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:01:55,831 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 825 transitions. [2021-12-22 00:01:55,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 3.99492385786802) internal successors, (787), 197 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:01:55,832 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 825 transitions. [2021-12-22 00:01:55,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2021-12-22 00:01:55,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:01:55,836 INFO L514 BasicCegarLoop]: trace histogram [194, 194, 194, 194, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:01:55,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 00:01:56,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-22 00:01:56,054 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:01:56,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:01:56,055 INFO L85 PathProgramCache]: Analyzing trace with hash -2100549616, now seen corresponding path program 2 times [2021-12-22 00:01:56,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:01:56,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20297462] [2021-12-22 00:01:56,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:01:56,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:01:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:02:06,599 INFO L134 CoverageAnalysis]: Checked inductivity of 75080 backedges. 0 proven. 75078 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 00:02:06,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:02:06,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20297462] [2021-12-22 00:02:06,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20297462] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:02:06,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648987635] [2021-12-22 00:02:06,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 00:02:06,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:02:06,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:02:06,604 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) [2021-12-22 00:02:06,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 00:02:06,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 00:02:06,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 00:02:06,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 00:02:06,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:02:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 75080 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75080 trivial. 0 not checked. [2021-12-22 00:02:09,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 00:02:09,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648987635] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:02:09,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 00:02:09,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [197] total 199 [2021-12-22 00:02:09,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342399910] [2021-12-22 00:02:09,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:02:09,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:02:09,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:02:09,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:02:09,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19310, Invalid=20092, Unknown=0, NotChecked=0, Total=39402 [2021-12-22 00:02:09,906 INFO L87 Difference]: Start difference. First operand 817 states and 825 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:02:09,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:02:09,911 INFO L93 Difference]: Finished difference Result 837 states and 851 transitions. [2021-12-22 00:02:09,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:02:09,911 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 789 [2021-12-22 00:02:09,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:02:09,914 INFO L225 Difference]: With dead ends: 837 [2021-12-22 00:02:09,914 INFO L226 Difference]: Without dead ends: 833 [2021-12-22 00:02:09,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 985 GetRequests, 788 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=19310, Invalid=20092, Unknown=0, NotChecked=0, Total=39402 [2021-12-22 00:02:09,917 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:02:09,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 30 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2021-12-22 00:02:09,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-12-22 00:02:09,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 828. [2021-12-22 00:02:09,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 826 states have (on average 1.0181598062953996) internal successors, (841), 827 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:02:09,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 841 transitions. [2021-12-22 00:02:09,925 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 841 transitions. Word has length 789 [2021-12-22 00:02:09,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:02:09,928 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 841 transitions. [2021-12-22 00:02:09,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:02:09,928 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 841 transitions. [2021-12-22 00:02:09,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 794 [2021-12-22 00:02:09,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:02:09,933 INFO L514 BasicCegarLoop]: trace histogram [194, 194, 194, 194, 4, 4, 4, 1, 1, 1, 1, 1] [2021-12-22 00:02:09,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 00:02:10,149 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,SelfDestructingSolverStorable13 [2021-12-22 00:02:10,149 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 8 more)] === [2021-12-22 00:02:10,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:02:10,150 INFO L85 PathProgramCache]: Analyzing trace with hash 708285286, now seen corresponding path program 4 times [2021-12-22 00:02:10,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:02:10,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970855144] [2021-12-22 00:02:10,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:02:10,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:02:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:02:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 75100 backedges. 0 proven. 75078 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 00:02:18,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:02:18,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970855144] [2021-12-22 00:02:18,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970855144] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:02:18,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447041275] [2021-12-22 00:02:18,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 00:02:18,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:02:18,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:02:18,527 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) [2021-12-22 00:02:18,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process