./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/termination-crafted/Arrays01-EquivalentConstantIndices-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/termination-crafted/Arrays01-EquivalentConstantIndices-1.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 cad2c6f6e8ebe2adcd550e4a56b83be37e52f812ae33bfb645236c6925734dbf --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 20:07:03,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 20:07:03,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 20:07:03,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 20:07:03,611 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 20:07:03,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 20:07:03,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 20:07:03,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 20:07:03,614 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 20:07:03,615 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 20:07:03,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 20:07:03,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 20:07:03,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 20:07:03,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 20:07:03,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 20:07:03,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 20:07:03,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 20:07:03,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 20:07:03,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 20:07:03,622 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 20:07:03,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 20:07:03,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 20:07:03,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 20:07:03,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 20:07:03,636 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 20:07:03,636 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 20:07:03,636 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 20:07:03,637 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 20:07:03,637 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 20:07:03,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 20:07:03,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 20:07:03,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 20:07:03,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 20:07:03,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 20:07:03,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 20:07:03,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 20:07:03,649 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 20:07:03,649 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 20:07:03,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 20:07:03,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 20:07:03,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 20:07:03,653 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2021-12-18 20:07:03,674 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 20:07:03,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 20:07:03,674 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 20:07:03,674 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 20:07:03,675 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 20:07:03,675 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 20:07:03,676 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 20:07:03,676 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 20:07:03,676 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 20:07:03,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 20:07:03,677 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 20:07:03,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 20:07:03,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 20:07:03,677 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 20:07:03,677 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 20:07:03,677 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 20:07:03,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 20:07:03,678 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 20:07:03,678 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 20:07:03,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 20:07:03,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 20:07:03,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 20:07:03,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 20:07:03,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 20:07:03,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 20:07:03,679 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 20:07:03,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 20:07:03,679 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 20:07:03,679 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cad2c6f6e8ebe2adcd550e4a56b83be37e52f812ae33bfb645236c6925734dbf [2021-12-18 20:07:03,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 20:07:03,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 20:07:03,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 20:07:03,885 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 20:07:03,886 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 20:07:03,887 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/Arrays01-EquivalentConstantIndices-1.c [2021-12-18 20:07:03,943 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/501a61bac/13cf64ca39574800bfbde4d748973f59/FLAGdf95c4106 [2021-12-18 20:07:04,298 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 20:07:04,298 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/Arrays01-EquivalentConstantIndices-1.c [2021-12-18 20:07:04,305 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/501a61bac/13cf64ca39574800bfbde4d748973f59/FLAGdf95c4106 [2021-12-18 20:07:04,315 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/501a61bac/13cf64ca39574800bfbde4d748973f59 [2021-12-18 20:07:04,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 20:07:04,320 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 20:07:04,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 20:07:04,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 20:07:04,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 20:07:04,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:07:04" (1/1) ... [2021-12-18 20:07:04,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61330061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:07:04, skipping insertion in model container [2021-12-18 20:07:04,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:07:04" (1/1) ... [2021-12-18 20:07:04,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 20:07:04,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 20:07:04,457 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 20:07:04,460 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 20:07:04,474 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 20:07:04,485 INFO L208 MainTranslator]: Completed translation [2021-12-18 20:07:04,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:07:04 WrapperNode [2021-12-18 20:07:04,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 20:07:04,487 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 20:07:04,487 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 20:07:04,487 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 20:07:04,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:07:04" (1/1) ... [2021-12-18 20:07:04,496 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:07:04" (1/1) ... [2021-12-18 20:07:04,507 INFO L137 Inliner]: procedures = 8, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 33 [2021-12-18 20:07:04,508 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 20:07:04,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 20:07:04,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 20:07:04,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 20:07:04,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:07:04" (1/1) ... [2021-12-18 20:07:04,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:07:04" (1/1) ... [2021-12-18 20:07:04,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:07:04" (1/1) ... [2021-12-18 20:07:04,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:07:04" (1/1) ... [2021-12-18 20:07:04,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:07:04" (1/1) ... [2021-12-18 20:07:04,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:07:04" (1/1) ... [2021-12-18 20:07:04,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:07:04" (1/1) ... [2021-12-18 20:07:04,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 20:07:04,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 20:07:04,536 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 20:07:04,536 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 20:07:04,537 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:07:04" (1/1) ... [2021-12-18 20:07:04,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 20:07:04,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:04,560 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 20:07:04,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 20:07:04,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 20:07:04,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 20:07:04,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 20:07:04,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 20:07:04,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 20:07:04,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 20:07:04,646 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 20:07:04,647 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 20:07:04,771 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 20:07:04,775 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 20:07:04,775 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-18 20:07:04,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:07:04 BoogieIcfgContainer [2021-12-18 20:07:04,776 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 20:07:04,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 20:07:04,778 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 20:07:04,780 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 20:07:04,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 08:07:04" (1/3) ... [2021-12-18 20:07:04,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@460a76b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:07:04, skipping insertion in model container [2021-12-18 20:07:04,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:07:04" (2/3) ... [2021-12-18 20:07:04,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@460a76b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:07:04, skipping insertion in model container [2021-12-18 20:07:04,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:07:04" (3/3) ... [2021-12-18 20:07:04,784 INFO L111 eAbstractionObserver]: Analyzing ICFG Arrays01-EquivalentConstantIndices-1.c [2021-12-18 20:07:04,787 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 20:07:04,790 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-12-18 20:07:04,833 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 20:07:04,860 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 20:07:04,860 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-12-18 20:07:04,869 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:04,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-18 20:07:04,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:04,874 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-18 20:07:04,874 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:07:04,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:04,880 INFO L85 PathProgramCache]: Analyzing trace with hash 926025, now seen corresponding path program 1 times [2021-12-18 20:07:04,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:04,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017480702] [2021-12-18 20:07:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:04,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:04,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:07:04,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:04,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017480702] [2021-12-18 20:07:04,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017480702] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:07:04,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:07:04,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 20:07:04,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617186032] [2021-12-18 20:07:04,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:07:04,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-18 20:07:04,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:05,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-18 20:07:05,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 20:07:05,011 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2021-12-18 20:07:05,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:05,019 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-12-18 20:07:05,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-18 20:07:05,022 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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 [2021-12-18 20:07:05,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:05,026 INFO L225 Difference]: With dead ends: 24 [2021-12-18 20:07:05,026 INFO L226 Difference]: Without dead ends: 22 [2021-12-18 20:07:05,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 20:07:05,030 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:05,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:07:05,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-18 20:07:05,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-18 20:07:05,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:05,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-12-18 20:07:05,050 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 4 [2021-12-18 20:07:05,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:05,051 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-12-18 20:07:05,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2021-12-18 20:07:05,051 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-12-18 20:07:05,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-18 20:07:05,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:05,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-18 20:07:05,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 20:07:05,052 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:07:05,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:05,055 INFO L85 PathProgramCache]: Analyzing trace with hash 925715, now seen corresponding path program 1 times [2021-12-18 20:07:05,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:05,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685282930] [2021-12-18 20:07:05,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:05,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:05,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:07:05,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:05,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685282930] [2021-12-18 20:07:05,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685282930] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:07:05,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:07:05,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:07:05,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213166359] [2021-12-18 20:07:05,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:07:05,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:07:05,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:05,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:07:05,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:07:05,104 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) 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) [2021-12-18 20:07:05,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:05,129 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-12-18 20:07:05,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:07:05,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) 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 [2021-12-18 20:07:05,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:05,131 INFO L225 Difference]: With dead ends: 28 [2021-12-18 20:07:05,131 INFO L226 Difference]: Without dead ends: 28 [2021-12-18 20:07:05,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:07:05,136 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:05,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 36 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:07:05,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-18 20:07:05,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2021-12-18 20:07:05,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-12-18 20:07:05,141 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 4 [2021-12-18 20:07:05,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:05,141 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-12-18 20:07:05,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) 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) [2021-12-18 20:07:05,141 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-12-18 20:07:05,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-18 20:07:05,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:05,142 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-18 20:07:05,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 20:07:05,142 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:07:05,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:05,143 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2021-12-18 20:07:05,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:05,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112303850] [2021-12-18 20:07:05,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:05,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:05,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:07:05,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:05,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112303850] [2021-12-18 20:07:05,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112303850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:07:05,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:07:05,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 20:07:05,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913737717] [2021-12-18 20:07:05,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:07:05,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:07:05,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:05,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:07:05,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:07:05,189 INFO L87 Difference]: Start difference. First operand 23 states and 24 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) [2021-12-18 20:07:05,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:05,211 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-12-18 20:07:05,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:07:05,212 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 [2021-12-18 20:07:05,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:05,212 INFO L225 Difference]: With dead ends: 19 [2021-12-18 20:07:05,213 INFO L226 Difference]: Without dead ends: 19 [2021-12-18 20:07:05,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:07:05,216 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:05,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 10 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:07:05,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-18 20:07:05,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-18 20:07:05,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:05,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-12-18 20:07:05,222 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 4 [2021-12-18 20:07:05,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:05,222 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-12-18 20:07:05,222 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) [2021-12-18 20:07:05,222 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-12-18 20:07:05,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-18 20:07:05,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:05,223 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-18 20:07:05,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-18 20:07:05,224 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:07:05,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:05,224 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2021-12-18 20:07:05,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:05,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364188749] [2021-12-18 20:07:05,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:05,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:07:05,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:05,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364188749] [2021-12-18 20:07:05,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364188749] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:07:05,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:07:05,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 20:07:05,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097328117] [2021-12-18 20:07:05,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:07:05,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:07:05,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:05,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:07:05,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:07:05,270 INFO L87 Difference]: Start difference. First operand 19 states and 20 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) [2021-12-18 20:07:05,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:05,295 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-12-18 20:07:05,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:07:05,295 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 [2021-12-18 20:07:05,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:05,296 INFO L225 Difference]: With dead ends: 22 [2021-12-18 20:07:05,296 INFO L226 Difference]: Without dead ends: 22 [2021-12-18 20:07:05,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:07:05,297 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:05,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 22 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:07:05,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-18 20:07:05,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-12-18 20:07:05,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.4) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:05,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-12-18 20:07:05,299 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 4 [2021-12-18 20:07:05,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:05,300 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-12-18 20:07:05,300 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) [2021-12-18 20:07:05,300 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-12-18 20:07:05,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 20:07:05,300 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:05,300 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:05,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 20:07:05,301 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:07:05,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:05,301 INFO L85 PathProgramCache]: Analyzing trace with hash 264435863, now seen corresponding path program 1 times [2021-12-18 20:07:05,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:05,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973666710] [2021-12-18 20:07:05,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:05,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:07:05,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:05,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973666710] [2021-12-18 20:07:05,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973666710] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:05,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504209958] [2021-12-18 20:07:05,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:05,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:05,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:05,328 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:07:05,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 20:07:05,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:05,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 20:07:05,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:07:05,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:07:05,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:07:05,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504209958] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:07:05,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:07:05,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-18 20:07:05,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899028827] [2021-12-18 20:07:05,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:07:05,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:07:05,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:05,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:07:05,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:07:05,419 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:05,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:05,442 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2021-12-18 20:07:05,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:07:05,443 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-18 20:07:05,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:05,443 INFO L225 Difference]: With dead ends: 33 [2021-12-18 20:07:05,443 INFO L226 Difference]: Without dead ends: 33 [2021-12-18 20:07:05,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:07:05,444 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:05,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 42 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:07:05,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-18 20:07:05,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-12-18 20:07:05,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:05,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-18 20:07:05,447 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 8 [2021-12-18 20:07:05,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:05,448 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-18 20:07:05,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:05,448 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-18 20:07:05,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 20:07:05,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:05,448 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:05,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 20:07:05,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:05,665 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:07:05,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:05,665 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2021-12-18 20:07:05,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:05,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748861643] [2021-12-18 20:07:05,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:05,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:05,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:07:05,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:05,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748861643] [2021-12-18 20:07:05,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748861643] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:05,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379375420] [2021-12-18 20:07:05,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:05,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:05,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:05,756 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:07:05,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 20:07:05,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:05,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 20:07:05,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:05,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 20:07:05,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:07:05,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:07:05,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:07:05,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379375420] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:07:05,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:07:05,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2021-12-18 20:07:05,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042275776] [2021-12-18 20:07:05,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:07:05,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 20:07:05,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:05,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 20:07:05,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-18 20:07:05,954 INFO L87 Difference]: Start difference. First operand 31 states and 34 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) [2021-12-18 20:07:06,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:06,019 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-12-18 20:07:06,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 20:07:06,020 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 [2021-12-18 20:07:06,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:06,020 INFO L225 Difference]: With dead ends: 27 [2021-12-18 20:07:06,020 INFO L226 Difference]: Without dead ends: 27 [2021-12-18 20:07:06,021 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 [2021-12-18 20:07:06,021 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:06,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:07:06,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-18 20:07:06,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-18 20:07:06,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:06,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-12-18 20:07:06,034 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 8 [2021-12-18 20:07:06,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:06,034 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-12-18 20:07:06,035 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) [2021-12-18 20:07:06,035 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-12-18 20:07:06,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-18 20:07:06,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:06,036 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:06,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 20:07:06,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-18 20:07:06,252 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:07:06,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:06,253 INFO L85 PathProgramCache]: Analyzing trace with hash 868272224, now seen corresponding path program 1 times [2021-12-18 20:07:06,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:06,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767576896] [2021-12-18 20:07:06,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:06,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:06,309 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:07:06,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:06,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767576896] [2021-12-18 20:07:06,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767576896] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:06,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266112905] [2021-12-18 20:07:06,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:06,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:06,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:06,311 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:07:06,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 20:07:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:06,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 20:07:06,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:07:06,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:07:06,458 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:07:06,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266112905] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:07:06,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:07:06,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-18 20:07:06,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258322061] [2021-12-18 20:07:06,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:07:06,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 20:07:06,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:06,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 20:07:06,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-18 20:07:06,460 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:06,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:06,492 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2021-12-18 20:07:06,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 20:07:06,493 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-18 20:07:06,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:06,493 INFO L225 Difference]: With dead ends: 51 [2021-12-18 20:07:06,493 INFO L226 Difference]: Without dead ends: 51 [2021-12-18 20:07:06,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-18 20:07:06,494 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:06,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 48 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:07:06,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-18 20:07:06,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-18 20:07:06,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:06,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-12-18 20:07:06,498 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 23 [2021-12-18 20:07:06,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:06,498 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-12-18 20:07:06,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:06,499 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-12-18 20:07:06,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-18 20:07:06,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:06,500 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:06,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 20:07:06,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:06,713 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:07:06,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:06,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1708005006, now seen corresponding path program 2 times [2021-12-18 20:07:06,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:06,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956369382] [2021-12-18 20:07:06,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:06,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:07:06,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:06,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956369382] [2021-12-18 20:07:06,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956369382] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:06,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487072849] [2021-12-18 20:07:06,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:07:06,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:06,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:06,854 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:07:06,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 20:07:06,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-18 20:07:06,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:07:06,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 20:07:06,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 20:07:07,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:07:07,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487072849] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:07:07,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:07:07,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2021-12-18 20:07:07,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51096564] [2021-12-18 20:07:07,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:07:07,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:07:07,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:07,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:07:07,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-12-18 20:07:07,153 INFO L87 Difference]: Start difference. First operand 51 states and 52 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) [2021-12-18 20:07:07,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:07,154 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-12-18 20:07:07,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:07:07,154 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 47 [2021-12-18 20:07:07,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:07,155 INFO L225 Difference]: With dead ends: 56 [2021-12-18 20:07:07,155 INFO L226 Difference]: Without dead ends: 54 [2021-12-18 20:07:07,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-12-18 20:07:07,156 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:07,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 21 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2021-12-18 20:07:07,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-18 20:07:07,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-12-18 20:07:07,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:07,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-12-18 20:07:07,159 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 47 [2021-12-18 20:07:07,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:07,160 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-12-18 20:07:07,160 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) [2021-12-18 20:07:07,160 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-12-18 20:07:07,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 20:07:07,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:07,161 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:07,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 20:07:07,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:07,390 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:07:07,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:07,391 INFO L85 PathProgramCache]: Analyzing trace with hash 962364987, now seen corresponding path program 1 times [2021-12-18 20:07:07,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:07,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049887855] [2021-12-18 20:07:07,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:07,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:07:07,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:07,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049887855] [2021-12-18 20:07:07,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049887855] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:07,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792756622] [2021-12-18 20:07:07,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:07,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:07,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:07,535 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:07:07,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 20:07:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:07,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 20:07:07,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:07:07,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:07:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:07:07,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792756622] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:07:07,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:07:07,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-18 20:07:07,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475928011] [2021-12-18 20:07:07,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:07:07,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-18 20:07:07,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:07,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-18 20:07:07,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-18 20:07:07,931 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 25 states, 25 states have (on average 3.92) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:08,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:08,004 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2021-12-18 20:07:08,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 20:07:08,005 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-18 20:07:08,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:08,006 INFO L225 Difference]: With dead ends: 101 [2021-12-18 20:07:08,006 INFO L226 Difference]: Without dead ends: 101 [2021-12-18 20:07:08,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-18 20:07:08,006 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:08,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 70 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:07:08,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-18 20:07:08,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-12-18 20:07:08,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:08,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-12-18 20:07:08,011 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 52 [2021-12-18 20:07:08,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:08,011 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-12-18 20:07:08,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:08,011 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-12-18 20:07:08,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-18 20:07:08,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:08,013 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:08,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 20:07:08,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:08,229 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-18 20:07:08,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:08,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1197015391, now seen corresponding path program 2 times [2021-12-18 20:07:08,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:08,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884470647] [2021-12-18 20:07:08,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:08,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:07:08,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:08,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884470647] [2021-12-18 20:07:08,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884470647] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:08,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395677906] [2021-12-18 20:07:08,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:07:08,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:08,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:08,502 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:07:08,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 20:07:08,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-18 20:07:08,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:07:08,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 20:07:08,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2021-12-18 20:07:08,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:07:08,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395677906] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:07:08,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:07:08,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [25] total 27 [2021-12-18 20:07:08,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117057480] [2021-12-18 20:07:08,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:07:08,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:07:08,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:08,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:07:08,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2021-12-18 20:07:08,989 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:08,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:08,990 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2021-12-18 20:07:08,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:07:08,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-12-18 20:07:08,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:08,991 INFO L225 Difference]: With dead ends: 100 [2021-12-18 20:07:08,991 INFO L226 Difference]: Without dead ends: 0 [2021-12-18 20:07:08,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2021-12-18 20:07:08,992 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:08,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2021-12-18 20:07:08,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-18 20:07:08,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-18 20:07:08,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:08,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-18 20:07:08,993 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 100 [2021-12-18 20:07:08,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:08,993 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-18 20:07:08,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:07:08,994 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-18 20:07:08,994 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-18 20:07:08,996 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (8 of 9 remaining) [2021-12-18 20:07:08,996 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (7 of 9 remaining) [2021-12-18 20:07:08,996 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (6 of 9 remaining) [2021-12-18 20:07:08,996 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (5 of 9 remaining) [2021-12-18 20:07:08,996 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (4 of 9 remaining) [2021-12-18 20:07:08,996 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (3 of 9 remaining) [2021-12-18 20:07:08,997 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (2 of 9 remaining) [2021-12-18 20:07:08,997 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION (1 of 9 remaining) [2021-12-18 20:07:08,997 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2021-12-18 20:07:09,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-18 20:07:09,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:09,226 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:09,227 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-18 20:07:09,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 08:07:09 BoogieIcfgContainer [2021-12-18 20:07:09,229 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-18 20:07:09,229 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-18 20:07:09,229 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-18 20:07:09,229 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-18 20:07:09,230 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:07:04" (3/4) ... [2021-12-18 20:07:09,231 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-18 20:07:09,237 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-12-18 20:07:09,238 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-18 20:07:09,238 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-18 20:07:09,238 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-18 20:07:09,255 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-18 20:07:09,255 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-18 20:07:09,255 INFO L158 Benchmark]: Toolchain (without parser) took 4935.73ms. Allocated memory was 94.4MB in the beginning and 136.3MB in the end (delta: 41.9MB). Free memory was 63.5MB in the beginning and 111.3MB in the end (delta: -47.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 20:07:09,255 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 73.4MB. Free memory was 31.8MB in the beginning and 31.8MB in the end (delta: 37.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 20:07:09,256 INFO L158 Benchmark]: CACSL2BoogieTranslator took 166.06ms. Allocated memory is still 94.4MB. Free memory was 63.3MB in the beginning and 71.6MB in the end (delta: -8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-18 20:07:09,256 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.87ms. Allocated memory is still 94.4MB. Free memory was 71.6MB in the beginning and 70.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 20:07:09,256 INFO L158 Benchmark]: Boogie Preprocessor took 26.68ms. Allocated memory is still 94.4MB. Free memory was 70.5MB in the beginning and 69.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 20:07:09,256 INFO L158 Benchmark]: RCFGBuilder took 240.62ms. Allocated memory is still 94.4MB. Free memory was 69.5MB in the beginning and 59.5MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-18 20:07:09,257 INFO L158 Benchmark]: TraceAbstraction took 4451.39ms. Allocated memory was 94.4MB in the beginning and 136.3MB in the end (delta: 41.9MB). Free memory was 59.0MB in the beginning and 113.3MB in the end (delta: -54.2MB). Peak memory consumption was 46.6MB. Max. memory is 16.1GB. [2021-12-18 20:07:09,257 INFO L158 Benchmark]: Witness Printer took 25.62ms. Allocated memory is still 136.3MB. Free memory was 113.3MB in the beginning and 111.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 20:07:09,258 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 73.4MB. Free memory was 31.8MB in the beginning and 31.8MB in the end (delta: 37.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 166.06ms. Allocated memory is still 94.4MB. Free memory was 63.3MB in the beginning and 71.6MB in the end (delta: -8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.87ms. Allocated memory is still 94.4MB. Free memory was 71.6MB in the beginning and 70.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.68ms. Allocated memory is still 94.4MB. Free memory was 70.5MB in the beginning and 69.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 240.62ms. Allocated memory is still 94.4MB. Free memory was 69.5MB in the beginning and 59.5MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 4451.39ms. Allocated memory was 94.4MB in the beginning and 136.3MB in the end (delta: 41.9MB). Free memory was 59.0MB in the beginning and 113.3MB in the end (delta: -54.2MB). Peak memory consumption was 46.6MB. Max. memory is 16.1GB. * Witness Printer took 25.62ms. Allocated memory is still 136.3MB. Free memory was 113.3MB in the beginning and 111.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 14]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 10]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 4.4s, OverallIterations: 10, TraceHistogramMax: 22, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 178 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 178 mSDsluCounter, 321 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 19 IncrementalHoareTripleChecker+Unchecked, 184 mSDsCounter, 41 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 211 IncrementalHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 41 mSolverCounterUnsat, 137 mSDtfsCounter, 211 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 396 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=9, InterpolantAutomatonStates: 68, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 10 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 492 NumberOfCodeBlocks, 359 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 563 ConstructedInterpolants, 143 QuantifiedInterpolants, 3190 SizeOfPredicates, 0 NumberOfNonLiveVariables, 452 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 20 InterpolantComputations, 6 PerfectInterpolantSequences, 1146/2945 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-18 20:07:09,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE