./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0019-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3a877d22 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/memsafety/test-0019-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 40afad058466dec508429aba14a695fa830becbd8e90e3307f02f796ff077dad --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 14:00:05,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 14:00:05,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 14:00:05,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 14:00:05,454 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 14:00:05,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 14:00:05,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 14:00:05,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 14:00:05,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 14:00:05,464 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 14:00:05,464 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 14:00:05,465 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 14:00:05,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 14:00:05,467 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 14:00:05,469 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 14:00:05,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 14:00:05,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 14:00:05,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 14:00:05,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 14:00:05,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 14:00:05,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 14:00:05,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 14:00:05,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 14:00:05,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 14:00:05,504 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 14:00:05,504 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 14:00:05,504 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 14:00:05,506 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 14:00:05,506 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 14:00:05,507 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 14:00:05,507 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 14:00:05,508 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 14:00:05,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 14:00:05,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 14:00:05,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 14:00:05,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 14:00:05,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 14:00:05,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 14:00:05,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 14:00:05,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 14:00:05,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 14:00:05,529 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-15 14:00:05,554 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 14:00:05,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 14:00:05,559 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 14:00:05,559 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 14:00:05,560 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 14:00:05,560 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 14:00:05,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 14:00:05,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 14:00:05,561 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 14:00:05,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 14:00:05,562 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 14:00:05,562 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 14:00:05,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 14:00:05,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 14:00:05,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 14:00:05,563 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-15 14:00:05,563 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-15 14:00:05,563 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-15 14:00:05,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 14:00:05,563 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 14:00:05,564 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 14:00:05,564 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 14:00:05,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 14:00:05,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 14:00:05,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 14:00:05,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 14:00:05,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 14:00:05,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 14:00:05,576 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 14:00:05,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 14:00:05,576 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 14:00:05,576 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 40afad058466dec508429aba14a695fa830becbd8e90e3307f02f796ff077dad [2021-12-15 14:00:05,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 14:00:05,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 14:00:05,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 14:00:05,991 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 14:00:05,992 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 14:00:05,992 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0019-2.i [2021-12-15 14:00:06,109 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a2d1699a/678c8aaaa5c54a19867f80c1b95fea48/FLAG5ead044a1 [2021-12-15 14:00:06,617 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 14:00:06,617 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0019-2.i [2021-12-15 14:00:06,636 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a2d1699a/678c8aaaa5c54a19867f80c1b95fea48/FLAG5ead044a1 [2021-12-15 14:00:07,085 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a2d1699a/678c8aaaa5c54a19867f80c1b95fea48 [2021-12-15 14:00:07,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 14:00:07,088 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 14:00:07,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 14:00:07,091 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 14:00:07,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 14:00:07,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 02:00:07" (1/1) ... [2021-12-15 14:00:07,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23d99f80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:07, skipping insertion in model container [2021-12-15 14:00:07,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 02:00:07" (1/1) ... [2021-12-15 14:00:07,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 14:00:07,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 14:00:07,377 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 14:00:07,383 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 14:00:07,431 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 14:00:07,453 INFO L208 MainTranslator]: Completed translation [2021-12-15 14:00:07,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:07 WrapperNode [2021-12-15 14:00:07,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 14:00:07,455 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 14:00:07,455 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 14:00:07,456 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 14:00:07,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:07" (1/1) ... [2021-12-15 14:00:07,482 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:07" (1/1) ... [2021-12-15 14:00:07,502 INFO L137 Inliner]: procedures = 125, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 43 [2021-12-15 14:00:07,503 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 14:00:07,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 14:00:07,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 14:00:07,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 14:00:07,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:07" (1/1) ... [2021-12-15 14:00:07,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:07" (1/1) ... [2021-12-15 14:00:07,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:07" (1/1) ... [2021-12-15 14:00:07,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:07" (1/1) ... [2021-12-15 14:00:07,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:07" (1/1) ... [2021-12-15 14:00:07,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:07" (1/1) ... [2021-12-15 14:00:07,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:07" (1/1) ... [2021-12-15 14:00:07,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 14:00:07,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 14:00:07,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 14:00:07,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 14:00:07,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:07" (1/1) ... [2021-12-15 14:00:07,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 14:00:07,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:00:07,576 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) [2021-12-15 14:00:07,591 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 [2021-12-15 14:00:07,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 14:00:07,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 14:00:07,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 14:00:07,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 14:00:07,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 14:00:07,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 14:00:07,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 14:00:07,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 14:00:07,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 14:00:07,743 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 14:00:07,744 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 14:00:07,919 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 14:00:07,925 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 14:00:07,925 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-15 14:00:07,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 02:00:07 BoogieIcfgContainer [2021-12-15 14:00:07,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 14:00:07,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 14:00:07,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 14:00:07,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 14:00:07,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 02:00:07" (1/3) ... [2021-12-15 14:00:07,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba1b02d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 02:00:07, skipping insertion in model container [2021-12-15 14:00:07,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:07" (2/3) ... [2021-12-15 14:00:07,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba1b02d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 02:00:07, skipping insertion in model container [2021-12-15 14:00:07,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 02:00:07" (3/3) ... [2021-12-15 14:00:07,934 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0019-2.i [2021-12-15 14:00:07,938 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 14:00:07,938 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-12-15 14:00:07,987 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 14:00:07,992 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 [2021-12-15 14:00:07,992 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-12-15 14:00:08,016 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 42 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:08,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-15 14:00:08,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:00:08,020 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-15 14:00:08,021 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 14:00:08,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:00:08,024 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-15 14:00:08,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:00:08,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901658543] [2021-12-15 14:00:08,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:00:08,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:00:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:00:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:00:08,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:00:08,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901658543] [2021-12-15 14:00:08,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901658543] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:00:08,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 14:00:08,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 14:00:08,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150307974] [2021-12-15 14:00:08,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:00:08,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 14:00:08,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:00:08,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 14:00:08,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 14:00:08,285 INFO L87 Difference]: Start difference. First operand has 43 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 42 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:08,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:00:08,332 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-12-15 14:00:08,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 14:00:08,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-15 14:00:08,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:00:08,339 INFO L225 Difference]: With dead ends: 48 [2021-12-15 14:00:08,340 INFO L226 Difference]: Without dead ends: 46 [2021-12-15 14:00:08,341 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 [2021-12-15 14:00:08,343 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 14:00:08,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 32 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 14:00:08,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-15 14:00:08,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2021-12-15 14:00:08,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 38 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:08,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-12-15 14:00:08,363 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 3 [2021-12-15 14:00:08,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:00:08,364 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-12-15 14:00:08,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:08,364 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-12-15 14:00:08,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-15 14:00:08,364 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:00:08,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-15 14:00:08,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 14:00:08,365 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 14:00:08,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:00:08,365 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-15 14:00:08,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:00:08,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779290177] [2021-12-15 14:00:08,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:00:08,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:00:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:00:08,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:00:08,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:00:08,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779290177] [2021-12-15 14:00:08,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779290177] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:00:08,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 14:00:08,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 14:00:08,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033124488] [2021-12-15 14:00:08,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:00:08,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 14:00:08,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:00:08,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 14:00:08,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 14:00:08,403 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:08,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:00:08,421 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-12-15 14:00:08,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 14:00:08,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-15 14:00:08,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:00:08,422 INFO L225 Difference]: With dead ends: 38 [2021-12-15 14:00:08,422 INFO L226 Difference]: Without dead ends: 38 [2021-12-15 14:00:08,422 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 [2021-12-15 14:00:08,423 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 14:00:08,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 60 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 14:00:08,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-15 14:00:08,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-15 14:00:08,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 37 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:08,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-12-15 14:00:08,427 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 3 [2021-12-15 14:00:08,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:00:08,427 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-12-15 14:00:08,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:08,428 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-12-15 14:00:08,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-15 14:00:08,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:00:08,428 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-15 14:00:08,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 14:00:08,429 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 14:00:08,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:00:08,429 INFO L85 PathProgramCache]: Analyzing trace with hash 28691811, now seen corresponding path program 1 times [2021-12-15 14:00:08,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:00:08,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969600266] [2021-12-15 14:00:08,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:00:08,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:00:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:00:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:00:08,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:00:08,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969600266] [2021-12-15 14:00:08,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969600266] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:00:08,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 14:00:08,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 14:00:08,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099712637] [2021-12-15 14:00:08,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:00:08,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 14:00:08,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:00:08,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 14:00:08,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 14:00:08,523 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:08,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:00:08,559 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-12-15 14:00:08,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 14:00:08,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-12-15 14:00:08,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:00:08,560 INFO L225 Difference]: With dead ends: 44 [2021-12-15 14:00:08,560 INFO L226 Difference]: Without dead ends: 44 [2021-12-15 14:00:08,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 14:00:08,562 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 14:00:08,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 23 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 14:00:08,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-15 14:00:08,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-12-15 14:00:08,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 36 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:08,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-12-15 14:00:08,565 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 5 [2021-12-15 14:00:08,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:00:08,565 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-12-15 14:00:08,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:08,566 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-12-15 14:00:08,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 14:00:08,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:00:08,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:00:08,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 14:00:08,567 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 14:00:08,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:00:08,567 INFO L85 PathProgramCache]: Analyzing trace with hash 59200011, now seen corresponding path program 1 times [2021-12-15 14:00:08,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:00:08,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316029645] [2021-12-15 14:00:08,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:00:08,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:00:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:00:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:00:08,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:00:08,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316029645] [2021-12-15 14:00:08,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316029645] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:00:08,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 14:00:08,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 14:00:08,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105157132] [2021-12-15 14:00:08,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:00:08,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 14:00:08,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:00:08,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 14:00:08,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 14:00:08,614 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:08,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:00:08,663 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-12-15 14:00:08,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 14:00:08,664 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-15 14:00:08,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:00:08,665 INFO L225 Difference]: With dead ends: 39 [2021-12-15 14:00:08,665 INFO L226 Difference]: Without dead ends: 39 [2021-12-15 14:00:08,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-15 14:00:08,666 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 69 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 14:00:08,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 31 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 14:00:08,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-15 14:00:08,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2021-12-15 14:00:08,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.565217391304348) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:08,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-12-15 14:00:08,669 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 8 [2021-12-15 14:00:08,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:00:08,670 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-12-15 14:00:08,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:08,670 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-12-15 14:00:08,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 14:00:08,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:00:08,671 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:00:08,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 14:00:08,671 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 14:00:08,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:00:08,671 INFO L85 PathProgramCache]: Analyzing trace with hash 59200012, now seen corresponding path program 1 times [2021-12-15 14:00:08,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:00:08,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708938228] [2021-12-15 14:00:08,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:00:08,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:00:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:00:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:00:08,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:00:08,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708938228] [2021-12-15 14:00:08,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708938228] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:00:08,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 14:00:08,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 14:00:08,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250234854] [2021-12-15 14:00:08,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:00:08,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 14:00:08,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:00:08,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 14:00:08,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 14:00:08,727 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:08,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:00:08,792 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-12-15 14:00:08,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 14:00:08,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-15 14:00:08,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:00:08,793 INFO L225 Difference]: With dead ends: 31 [2021-12-15 14:00:08,793 INFO L226 Difference]: Without dead ends: 31 [2021-12-15 14:00:08,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 14:00:08,794 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 69 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 14:00:08,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 24 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 14:00:08,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-15 14:00:08,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-15 14:00:08,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 30 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:08,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-12-15 14:00:08,797 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 8 [2021-12-15 14:00:08,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:00:08,797 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-12-15 14:00:08,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:08,798 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-12-15 14:00:08,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 14:00:08,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:00:08,798 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:00:08,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 14:00:08,799 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 14:00:08,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:00:08,799 INFO L85 PathProgramCache]: Analyzing trace with hash 406185098, now seen corresponding path program 1 times [2021-12-15 14:00:08,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:00:08,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386985490] [2021-12-15 14:00:08,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:00:08,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:00:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:00:08,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:00:08,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:00:08,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386985490] [2021-12-15 14:00:08,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386985490] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:00:08,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 14:00:08,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 14:00:08,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952846799] [2021-12-15 14:00:08,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:00:08,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 14:00:08,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:00:08,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 14:00:08,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 14:00:08,916 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:09,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:00:09,019 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-12-15 14:00:09,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 14:00:09,020 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-15 14:00:09,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:00:09,023 INFO L225 Difference]: With dead ends: 30 [2021-12-15 14:00:09,023 INFO L226 Difference]: Without dead ends: 30 [2021-12-15 14:00:09,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-12-15 14:00:09,025 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 71 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 14:00:09,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 56 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 14:00:09,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-15 14:00:09,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-15 14:00:09,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 29 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:09,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-12-15 14:00:09,042 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 13 [2021-12-15 14:00:09,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:00:09,043 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-12-15 14:00:09,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:09,043 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-12-15 14:00:09,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-15 14:00:09,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:00:09,044 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:00:09,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 14:00:09,044 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 14:00:09,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:00:09,045 INFO L85 PathProgramCache]: Analyzing trace with hash -293163793, now seen corresponding path program 1 times [2021-12-15 14:00:09,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:00:09,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683256856] [2021-12-15 14:00:09,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:00:09,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:00:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:00:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:00:09,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:00:09,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683256856] [2021-12-15 14:00:09,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683256856] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:00:09,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 14:00:09,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 14:00:09,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347890986] [2021-12-15 14:00:09,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:00:09,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 14:00:09,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:00:09,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 14:00:09,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 14:00:09,148 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:09,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:00:09,262 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-12-15 14:00:09,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 14:00:09,264 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-15 14:00:09,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:00:09,267 INFO L225 Difference]: With dead ends: 29 [2021-12-15 14:00:09,268 INFO L226 Difference]: Without dead ends: 29 [2021-12-15 14:00:09,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-12-15 14:00:09,270 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 14:00:09,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 37 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 14:00:09,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-15 14:00:09,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-15 14:00:09,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 28 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:09,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-12-15 14:00:09,278 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 14 [2021-12-15 14:00:09,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:00:09,279 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-12-15 14:00:09,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:09,279 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-12-15 14:00:09,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 14:00:09,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:00:09,280 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:00:09,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 14:00:09,280 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 14:00:09,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:00:09,282 INFO L85 PathProgramCache]: Analyzing trace with hash -498142932, now seen corresponding path program 1 times [2021-12-15 14:00:09,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:00:09,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305254019] [2021-12-15 14:00:09,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:00:09,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:00:09,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:00:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:00:09,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 14:00:09,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305254019] [2021-12-15 14:00:09,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305254019] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:00:09,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 14:00:09,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 14:00:09,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730262826] [2021-12-15 14:00:09,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:00:09,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 14:00:09,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 14:00:09,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 14:00:09,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 14:00:09,366 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 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) [2021-12-15 14:00:09,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:00:09,459 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-12-15 14:00:09,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 14:00:09,462 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-15 14:00:09,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:00:09,463 INFO L225 Difference]: With dead ends: 30 [2021-12-15 14:00:09,463 INFO L226 Difference]: Without dead ends: 30 [2021-12-15 14:00:09,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-12-15 14:00:09,471 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 14:00:09,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 45 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 14:00:09,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-15 14:00:09,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-12-15 14:00:09,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 27 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) [2021-12-15 14:00:09,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-12-15 14:00:09,499 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 15 [2021-12-15 14:00:09,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:00:09,500 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-12-15 14:00:09,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 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) [2021-12-15 14:00:09,501 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-12-15 14:00:09,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-15 14:00:09,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:00:09,502 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:00:09,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 14:00:09,506 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 14:00:09,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:00:09,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1750799681, now seen corresponding path program 1 times [2021-12-15 14:00:09,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 14:00:09,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353383254] [2021-12-15 14:00:09,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:00:09,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 14:00:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 14:00:09,532 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 14:00:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 14:00:09,599 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 14:00:09,599 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-15 14:00:09,599 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK (18 of 19 remaining) [2021-12-15 14:00:09,601 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (17 of 19 remaining) [2021-12-15 14:00:09,601 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (16 of 19 remaining) [2021-12-15 14:00:09,601 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (15 of 19 remaining) [2021-12-15 14:00:09,601 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (14 of 19 remaining) [2021-12-15 14:00:09,602 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (13 of 19 remaining) [2021-12-15 14:00:09,602 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (12 of 19 remaining) [2021-12-15 14:00:09,602 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (11 of 19 remaining) [2021-12-15 14:00:09,602 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (10 of 19 remaining) [2021-12-15 14:00:09,602 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE (9 of 19 remaining) [2021-12-15 14:00:09,602 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE (8 of 19 remaining) [2021-12-15 14:00:09,602 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE (7 of 19 remaining) [2021-12-15 14:00:09,603 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE (6 of 19 remaining) [2021-12-15 14:00:09,603 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE (5 of 19 remaining) [2021-12-15 14:00:09,603 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE (4 of 19 remaining) [2021-12-15 14:00:09,603 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (3 of 19 remaining) [2021-12-15 14:00:09,603 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION (2 of 19 remaining) [2021-12-15 14:00:09,603 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION (1 of 19 remaining) [2021-12-15 14:00:09,603 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION (0 of 19 remaining) [2021-12-15 14:00:09,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 14:00:09,606 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:00:09,608 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-15 14:00:09,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 02:00:09 BoogieIcfgContainer [2021-12-15 14:00:09,625 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-15 14:00:09,625 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-15 14:00:09,625 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-15 14:00:09,625 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-15 14:00:09,625 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 02:00:07" (3/4) ... [2021-12-15 14:00:09,627 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-15 14:00:09,627 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-15 14:00:09,628 INFO L158 Benchmark]: Toolchain (without parser) took 2539.50ms. Allocated memory was 92.3MB in the beginning and 117.4MB in the end (delta: 25.2MB). Free memory was 58.8MB in the beginning and 61.4MB in the end (delta: -2.5MB). Peak memory consumption was 23.9MB. Max. memory is 16.1GB. [2021-12-15 14:00:09,628 INFO L158 Benchmark]: CDTParser took 0.68ms. Allocated memory is still 92.3MB. Free memory was 49.9MB in the beginning and 49.9MB in the end (delta: 39.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 14:00:09,628 INFO L158 Benchmark]: CACSL2BoogieTranslator took 363.48ms. Allocated memory was 92.3MB in the beginning and 117.4MB in the end (delta: 25.2MB). Free memory was 58.6MB in the beginning and 86.0MB in the end (delta: -27.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-15 14:00:09,628 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.29ms. Allocated memory is still 117.4MB. Free memory was 86.0MB in the beginning and 84.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 14:00:09,628 INFO L158 Benchmark]: Boogie Preprocessor took 33.71ms. Allocated memory is still 117.4MB. Free memory was 84.0MB in the beginning and 82.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 14:00:09,628 INFO L158 Benchmark]: RCFGBuilder took 389.44ms. Allocated memory is still 117.4MB. Free memory was 82.8MB in the beginning and 70.8MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-15 14:00:09,629 INFO L158 Benchmark]: TraceAbstraction took 1696.31ms. Allocated memory is still 117.4MB. Free memory was 70.8MB in the beginning and 62.2MB in the end (delta: 8.6MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. [2021-12-15 14:00:09,629 INFO L158 Benchmark]: Witness Printer took 2.35ms. Allocated memory is still 117.4MB. Free memory was 62.2MB in the beginning and 61.4MB in the end (delta: 881.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 14:00:09,630 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.68ms. Allocated memory is still 92.3MB. Free memory was 49.9MB in the beginning and 49.9MB in the end (delta: 39.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 363.48ms. Allocated memory was 92.3MB in the beginning and 117.4MB in the end (delta: 25.2MB). Free memory was 58.6MB in the beginning and 86.0MB in the end (delta: -27.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.29ms. Allocated memory is still 117.4MB. Free memory was 86.0MB in the beginning and 84.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.71ms. Allocated memory is still 117.4MB. Free memory was 84.0MB in the beginning and 82.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 389.44ms. Allocated memory is still 117.4MB. Free memory was 82.8MB in the beginning and 70.8MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 1696.31ms. Allocated memory is still 117.4MB. Free memory was 70.8MB in the beginning and 62.2MB in the end (delta: 8.6MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. * Witness Printer took 2.35ms. Allocated memory is still 117.4MB. Free memory was 62.2MB in the beginning and 61.4MB in the end (delta: 881.1kB). 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 - UnprovableResult [Line: 543]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 543. Possible FailurePath: [L544] TData data; [L545] CALL alloc_data(&data) [L529] pdata->lo = malloc(16) VAL [malloc(16)={-1:0}, pdata={3:0}, pdata={3:0}] [L530] pdata->hi = malloc(24) VAL [malloc(24)={-2:0}, pdata={3:0}, pdata={3:0}] [L545] RET alloc_data(&data) [L546] CALL free_data(&data) [L534] EXPR data->lo VAL [data={3:0}, data={3:0}, data->lo={-1:0}] [L534] void *lo = data->lo; [L535] EXPR data->hi VAL [data={3:0}, data={3:0}, data->hi={-2:0}, lo={-1:0}] [L535] void *hi = data->hi; [L536] COND FALSE !(lo == hi) VAL [data={3:0}, data={3:0}, hi={-2:0}, lo={-1:0}] [L540] data->lo = (void *) 0 VAL [data={3:0}, data={3:0}, hi={-2:0}, lo={-1:0}] [L541] data->hi = (void *) 0 VAL [data={3:0}, data={3:0}, hi={-2:0}, lo={-1:0}] [L546] RET free_data(&data) [L547] return 0; [L547] return 0; VAL [\result=0] - UnprovableResult [Line: 529]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 529]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 43 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 1.6s, OverallIterations: 9, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 344 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 344 mSDsluCounter, 308 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 148 mSDsCounter, 47 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 347 IncrementalHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 47 mSolverCounterUnsat, 160 mSDtfsCounter, 347 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=0, InterpolantAutomatonStates: 48, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 20 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 85 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 61 ConstructedInterpolants, 0 QuantifiedInterpolants, 416 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-15 14:00:09,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0019-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 40afad058466dec508429aba14a695fa830becbd8e90e3307f02f796ff077dad --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 14:00:11,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 14:00:11,672 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 14:00:11,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 14:00:11,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 14:00:11,703 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 14:00:11,704 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 14:00:11,709 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 14:00:11,710 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 14:00:11,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 14:00:11,715 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 14:00:11,716 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 14:00:11,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 14:00:11,718 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 14:00:11,720 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 14:00:11,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 14:00:11,722 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 14:00:11,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 14:00:11,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 14:00:11,728 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 14:00:11,730 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 14:00:11,732 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 14:00:11,733 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 14:00:11,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 14:00:11,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 14:00:11,740 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 14:00:11,740 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 14:00:11,741 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 14:00:11,742 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 14:00:11,742 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 14:00:11,743 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 14:00:11,743 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 14:00:11,744 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 14:00:11,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 14:00:11,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 14:00:11,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 14:00:11,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 14:00:11,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 14:00:11,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 14:00:11,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 14:00:11,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 14:00:11,751 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-15 14:00:11,778 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 14:00:11,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 14:00:11,779 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 14:00:11,779 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 14:00:11,780 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 14:00:11,780 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 14:00:11,781 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 14:00:11,781 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 14:00:11,781 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 14:00:11,782 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 14:00:11,782 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 14:00:11,782 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 14:00:11,783 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 14:00:11,783 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 14:00:11,783 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 14:00:11,783 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-15 14:00:11,783 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-15 14:00:11,783 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-15 14:00:11,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 14:00:11,784 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 14:00:11,784 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 14:00:11,784 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 14:00:11,784 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 14:00:11,784 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 14:00:11,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 14:00:11,785 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 14:00:11,785 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 14:00:11,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 14:00:11,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 14:00:11,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 14:00:11,785 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 14:00:11,785 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 14:00:11,786 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 14:00:11,786 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 14:00:11,786 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 40afad058466dec508429aba14a695fa830becbd8e90e3307f02f796ff077dad [2021-12-15 14:00:12,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 14:00:12,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 14:00:12,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 14:00:12,055 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 14:00:12,056 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 14:00:12,057 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0019-2.i [2021-12-15 14:00:12,100 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1253a954/d9c93beb9fb44e339aa9ba9dab8053a7/FLAG473145007 [2021-12-15 14:00:12,485 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 14:00:12,486 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0019-2.i [2021-12-15 14:00:12,498 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1253a954/d9c93beb9fb44e339aa9ba9dab8053a7/FLAG473145007 [2021-12-15 14:00:12,515 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1253a954/d9c93beb9fb44e339aa9ba9dab8053a7 [2021-12-15 14:00:12,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 14:00:12,518 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 14:00:12,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 14:00:12,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 14:00:12,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 14:00:12,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 02:00:12" (1/1) ... [2021-12-15 14:00:12,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b94ce3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:12, skipping insertion in model container [2021-12-15 14:00:12,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 02:00:12" (1/1) ... [2021-12-15 14:00:12,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 14:00:12,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 14:00:12,855 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 14:00:12,863 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 14:00:12,888 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 14:00:12,910 INFO L208 MainTranslator]: Completed translation [2021-12-15 14:00:12,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:12 WrapperNode [2021-12-15 14:00:12,911 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 14:00:12,912 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 14:00:12,912 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 14:00:12,912 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 14:00:12,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:12" (1/1) ... [2021-12-15 14:00:12,942 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:12" (1/1) ... [2021-12-15 14:00:12,962 INFO L137 Inliner]: procedures = 126, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 44 [2021-12-15 14:00:12,962 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 14:00:12,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 14:00:12,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 14:00:12,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 14:00:12,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:12" (1/1) ... [2021-12-15 14:00:12,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:12" (1/1) ... [2021-12-15 14:00:12,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:12" (1/1) ... [2021-12-15 14:00:12,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:12" (1/1) ... [2021-12-15 14:00:12,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:12" (1/1) ... [2021-12-15 14:00:12,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:12" (1/1) ... [2021-12-15 14:00:12,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:12" (1/1) ... [2021-12-15 14:00:12,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 14:00:12,998 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 14:00:12,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 14:00:12,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 14:00:13,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:12" (1/1) ... [2021-12-15 14:00:13,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 14:00:13,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 14:00:13,020 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) [2021-12-15 14:00:13,043 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 [2021-12-15 14:00:13,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 14:00:13,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 14:00:13,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 14:00:13,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 14:00:13,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 14:00:13,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 14:00:13,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 14:00:13,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 14:00:13,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 14:00:13,178 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 14:00:13,179 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 14:00:13,390 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 14:00:13,394 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 14:00:13,405 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-15 14:00:13,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 02:00:13 BoogieIcfgContainer [2021-12-15 14:00:13,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 14:00:13,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 14:00:13,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 14:00:13,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 14:00:13,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 02:00:12" (1/3) ... [2021-12-15 14:00:13,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de04eec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 02:00:13, skipping insertion in model container [2021-12-15 14:00:13,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 02:00:12" (2/3) ... [2021-12-15 14:00:13,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de04eec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 02:00:13, skipping insertion in model container [2021-12-15 14:00:13,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 02:00:13" (3/3) ... [2021-12-15 14:00:13,412 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0019-2.i [2021-12-15 14:00:13,416 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 14:00:13,416 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-12-15 14:00:13,442 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 14:00:13,446 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 [2021-12-15 14:00:13,447 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-12-15 14:00:13,455 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 42 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:13,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-15 14:00:13,458 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:00:13,459 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-15 14:00:13,459 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 14:00:13,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:00:13,463 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-15 14:00:13,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 14:00:13,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450887654] [2021-12-15 14:00:13,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:00:13,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 14:00:13,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 14:00:13,481 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 14:00:13,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-15 14:00:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:00:13,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-15 14:00:13,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:00:13,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 14:00:13,658 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-15 14:00:13,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-12-15 14:00:13,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:00:13,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 14:00:13,673 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 14:00:13,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450887654] [2021-12-15 14:00:13,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450887654] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:00:13,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 14:00:13,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 14:00:13,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065948052] [2021-12-15 14:00:13,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:00:13,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 14:00:13,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 14:00:13,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 14:00:13,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 14:00:13,695 INFO L87 Difference]: Start difference. First operand has 43 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 42 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:13,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:00:13,758 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-12-15 14:00:13,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 14:00:13,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-15 14:00:13,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:00:13,764 INFO L225 Difference]: With dead ends: 48 [2021-12-15 14:00:13,765 INFO L226 Difference]: Without dead ends: 46 [2021-12-15 14:00:13,765 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 [2021-12-15 14:00:13,768 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 14:00:13,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 32 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 14:00:13,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-15 14:00:13,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2021-12-15 14:00:13,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 38 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:13,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-12-15 14:00:13,788 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 3 [2021-12-15 14:00:13,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:00:13,788 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-12-15 14:00:13,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:13,788 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-12-15 14:00:13,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-15 14:00:13,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:00:13,789 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-15 14:00:13,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-15 14:00:13,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 14:00:13,997 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 14:00:13,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:00:13,998 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-15 14:00:13,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 14:00:13,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000487578] [2021-12-15 14:00:13,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:00:13,999 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 14:00:13,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 14:00:14,010 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 14:00:14,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-15 14:00:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:00:14,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 14:00:14,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:00:14,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 14:00:14,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-15 14:00:14,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-15 14:00:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:00:14,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 14:00:14,110 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 14:00:14,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1000487578] [2021-12-15 14:00:14,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1000487578] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:00:14,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 14:00:14,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 14:00:14,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711319250] [2021-12-15 14:00:14,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:00:14,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 14:00:14,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 14:00:14,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 14:00:14,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 14:00:14,113 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:14,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:00:14,152 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-12-15 14:00:14,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 14:00:14,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-15 14:00:14,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:00:14,154 INFO L225 Difference]: With dead ends: 38 [2021-12-15 14:00:14,154 INFO L226 Difference]: Without dead ends: 38 [2021-12-15 14:00:14,154 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 [2021-12-15 14:00:14,155 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 14:00:14,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 60 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 14:00:14,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-15 14:00:14,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-15 14:00:14,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 37 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-12-15 14:00:14,159 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 3 [2021-12-15 14:00:14,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:00:14,159 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-12-15 14:00:14,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:14,160 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-12-15 14:00:14,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-15 14:00:14,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:00:14,160 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-15 14:00:14,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-15 14:00:14,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 14:00:14,367 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 14:00:14,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:00:14,368 INFO L85 PathProgramCache]: Analyzing trace with hash 28691811, now seen corresponding path program 1 times [2021-12-15 14:00:14,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 14:00:14,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513833442] [2021-12-15 14:00:14,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:00:14,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 14:00:14,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 14:00:14,386 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 14:00:14,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-15 14:00:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:00:14,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-15 14:00:14,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:00:14,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 14:00:14,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-15 14:00:14,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-15 14:00:14,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 14:00:14,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-15 14:00:14,570 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-15 14:00:14,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-15 14:00:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:00:14,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 14:00:14,575 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 14:00:14,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513833442] [2021-12-15 14:00:14,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [513833442] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:00:14,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 14:00:14,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 14:00:14,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037964745] [2021-12-15 14:00:14,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:00:14,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 14:00:14,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 14:00:14,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 14:00:14,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 14:00:14,578 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:14,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:00:14,640 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-12-15 14:00:14,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 14:00:14,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-12-15 14:00:14,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:00:14,642 INFO L225 Difference]: With dead ends: 44 [2021-12-15 14:00:14,642 INFO L226 Difference]: Without dead ends: 44 [2021-12-15 14:00:14,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 14:00:14,643 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 63 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 14:00:14,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 23 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 14:00:14,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-15 14:00:14,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-12-15 14:00:14,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 36 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:14,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-12-15 14:00:14,646 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 5 [2021-12-15 14:00:14,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:00:14,646 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-12-15 14:00:14,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:14,647 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-12-15 14:00:14,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 14:00:14,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:00:14,647 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:00:14,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-15 14:00:14,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 14:00:14,848 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 14:00:14,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:00:14,848 INFO L85 PathProgramCache]: Analyzing trace with hash 59200011, now seen corresponding path program 1 times [2021-12-15 14:00:14,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 14:00:14,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10504885] [2021-12-15 14:00:14,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:00:14,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 14:00:14,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 14:00:14,850 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 14:00:14,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-15 14:00:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:00:14,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 14:00:14,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:00:14,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:00:14,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 14:00:14,951 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 14:00:14,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10504885] [2021-12-15 14:00:14,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10504885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:00:14,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 14:00:14,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 14:00:14,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993332919] [2021-12-15 14:00:14,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:00:14,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 14:00:14,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 14:00:14,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 14:00:14,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 14:00:14,952 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:15,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:00:15,056 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-12-15 14:00:15,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 14:00:15,056 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-15 14:00:15,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:00:15,057 INFO L225 Difference]: With dead ends: 39 [2021-12-15 14:00:15,057 INFO L226 Difference]: Without dead ends: 39 [2021-12-15 14:00:15,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-15 14:00:15,058 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 69 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 14:00:15,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 31 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 14:00:15,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-15 14:00:15,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2021-12-15 14:00:15,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.565217391304348) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:15,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-12-15 14:00:15,061 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 8 [2021-12-15 14:00:15,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:00:15,061 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-12-15 14:00:15,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:15,061 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-12-15 14:00:15,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 14:00:15,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:00:15,061 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:00:15,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-15 14:00:15,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 14:00:15,268 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 14:00:15,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:00:15,268 INFO L85 PathProgramCache]: Analyzing trace with hash 59200012, now seen corresponding path program 1 times [2021-12-15 14:00:15,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 14:00:15,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572039197] [2021-12-15 14:00:15,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:00:15,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 14:00:15,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 14:00:15,270 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 14:00:15,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-15 14:00:15,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:00:15,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-15 14:00:15,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:00:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:00:15,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 14:00:15,383 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 14:00:15,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1572039197] [2021-12-15 14:00:15,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1572039197] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:00:15,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 14:00:15,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 14:00:15,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034742530] [2021-12-15 14:00:15,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:00:15,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 14:00:15,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 14:00:15,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 14:00:15,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 14:00:15,384 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:15,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:00:15,460 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-12-15 14:00:15,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 14:00:15,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-15 14:00:15,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:00:15,461 INFO L225 Difference]: With dead ends: 31 [2021-12-15 14:00:15,461 INFO L226 Difference]: Without dead ends: 31 [2021-12-15 14:00:15,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 14:00:15,462 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 69 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 14:00:15,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 24 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 14:00:15,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-15 14:00:15,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-15 14:00:15,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 30 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:15,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-12-15 14:00:15,465 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 8 [2021-12-15 14:00:15,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:00:15,465 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-12-15 14:00:15,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:15,465 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-12-15 14:00:15,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 14:00:15,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:00:15,465 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:00:15,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-15 14:00:15,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 14:00:15,672 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 14:00:15,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:00:15,673 INFO L85 PathProgramCache]: Analyzing trace with hash 406185098, now seen corresponding path program 1 times [2021-12-15 14:00:15,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 14:00:15,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436703283] [2021-12-15 14:00:15,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:00:15,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 14:00:15,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 14:00:15,674 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 14:00:15,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-15 14:00:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:00:15,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 14:00:15,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:00:15,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 14:00:15,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-15 14:00:15,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:00:15,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 14:00:15,834 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 14:00:15,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436703283] [2021-12-15 14:00:15,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436703283] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:00:15,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 14:00:15,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 14:00:15,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725534797] [2021-12-15 14:00:15,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:00:15,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 14:00:15,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 14:00:15,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 14:00:15,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-15 14:00:15,836 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:16,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:00:16,105 INFO L93 Difference]: Finished difference Result 33 states and 32 transitions. [2021-12-15 14:00:16,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 14:00:16,105 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-15 14:00:16,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:00:16,106 INFO L225 Difference]: With dead ends: 33 [2021-12-15 14:00:16,106 INFO L226 Difference]: Without dead ends: 33 [2021-12-15 14:00:16,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-12-15 14:00:16,107 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 78 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 14:00:16,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 63 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 14:00:16,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-15 14:00:16,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2021-12-15 14:00:16,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 28 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:16,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-12-15 14:00:16,109 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 13 [2021-12-15 14:00:16,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:00:16,109 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-12-15 14:00:16,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:16,109 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-12-15 14:00:16,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-15 14:00:16,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:00:16,109 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:00:16,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-15 14:00:16,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 14:00:16,316 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 14:00:16,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:00:16,316 INFO L85 PathProgramCache]: Analyzing trace with hash -293163793, now seen corresponding path program 1 times [2021-12-15 14:00:16,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 14:00:16,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512545227] [2021-12-15 14:00:16,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:00:16,317 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 14:00:16,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 14:00:16,318 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 14:00:16,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-15 14:00:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:00:16,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-15 14:00:16,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:00:16,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 14:00:16,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-15 14:00:16,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:00:16,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 14:00:16,842 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 14:00:16,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512545227] [2021-12-15 14:00:16,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [512545227] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:00:16,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 14:00:16,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 14:00:16,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972435321] [2021-12-15 14:00:16,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:00:16,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 14:00:16,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 14:00:16,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 14:00:16,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-15 14:00:16,843 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:16,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:00:16,868 INFO L93 Difference]: Finished difference Result 32 states and 31 transitions. [2021-12-15 14:00:16,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 14:00:16,869 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-15 14:00:16,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:00:16,869 INFO L225 Difference]: With dead ends: 32 [2021-12-15 14:00:16,869 INFO L226 Difference]: Without dead ends: 32 [2021-12-15 14:00:16,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-15 14:00:16,870 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 14:00:16,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 99 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 47 Unchecked, 0.0s Time] [2021-12-15 14:00:16,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-15 14:00:16,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-12-15 14:00:16,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 27 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) [2021-12-15 14:00:16,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-12-15 14:00:16,872 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 14 [2021-12-15 14:00:16,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:00:16,872 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-12-15 14:00:16,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:16,872 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-12-15 14:00:16,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 14:00:16,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:00:16,872 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:00:16,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-15 14:00:17,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 14:00:17,073 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 14:00:17,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:00:17,073 INFO L85 PathProgramCache]: Analyzing trace with hash -498142932, now seen corresponding path program 1 times [2021-12-15 14:00:17,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 14:00:17,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928448970] [2021-12-15 14:00:17,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:00:17,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 14:00:17,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 14:00:17,076 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 14:00:17,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-15 14:00:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 14:00:17,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-15 14:00:17,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 14:00:17,188 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 [2021-12-15 14:00:17,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 14:00:17,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-12-15 14:00:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 14:00:17,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 14:00:17,283 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 14:00:17,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928448970] [2021-12-15 14:00:17,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928448970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 14:00:17,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 14:00:17,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 14:00:17,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754770131] [2021-12-15 14:00:17,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 14:00:17,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 14:00:17,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 14:00:17,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 14:00:17,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-15 14:00:17,284 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:17,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 14:00:17,586 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-12-15 14:00:17,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 14:00:17,587 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-15 14:00:17,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 14:00:17,587 INFO L225 Difference]: With dead ends: 29 [2021-12-15 14:00:17,587 INFO L226 Difference]: Without dead ends: 29 [2021-12-15 14:00:17,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-15 14:00:17,588 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 14:00:17,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 40 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 14:00:17,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-15 14:00:17,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-12-15 14:00:17,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.173913043478261) internal successors, (27), 26 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) [2021-12-15 14:00:17,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-12-15 14:00:17,590 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 15 [2021-12-15 14:00:17,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 14:00:17,590 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-12-15 14:00:17,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 14:00:17,590 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-12-15 14:00:17,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-15 14:00:17,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 14:00:17,590 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:00:17,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-15 14:00:17,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 14:00:17,791 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-15 14:00:17,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 14:00:17,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1750799681, now seen corresponding path program 1 times [2021-12-15 14:00:17,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 14:00:17,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310424440] [2021-12-15 14:00:17,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 14:00:17,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 14:00:17,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 14:00:17,795 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 14:00:17,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-15 14:00:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 14:00:17,873 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 14:00:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 14:00:17,933 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-12-15 14:00:17,933 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-15 14:00:17,934 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK (18 of 19 remaining) [2021-12-15 14:00:17,935 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (17 of 19 remaining) [2021-12-15 14:00:17,935 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (16 of 19 remaining) [2021-12-15 14:00:17,935 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (15 of 19 remaining) [2021-12-15 14:00:17,935 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (14 of 19 remaining) [2021-12-15 14:00:17,935 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (13 of 19 remaining) [2021-12-15 14:00:17,935 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (12 of 19 remaining) [2021-12-15 14:00:17,936 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (11 of 19 remaining) [2021-12-15 14:00:17,936 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (10 of 19 remaining) [2021-12-15 14:00:17,936 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE (9 of 19 remaining) [2021-12-15 14:00:17,936 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE (8 of 19 remaining) [2021-12-15 14:00:17,936 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE (7 of 19 remaining) [2021-12-15 14:00:17,936 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE (6 of 19 remaining) [2021-12-15 14:00:17,936 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE (5 of 19 remaining) [2021-12-15 14:00:17,937 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE (4 of 19 remaining) [2021-12-15 14:00:17,937 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (3 of 19 remaining) [2021-12-15 14:00:17,937 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION (2 of 19 remaining) [2021-12-15 14:00:17,937 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION (1 of 19 remaining) [2021-12-15 14:00:17,937 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION (0 of 19 remaining) [2021-12-15 14:00:17,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-15 14:00:18,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 14:00:18,140 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 14:00:18,142 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-15 14:00:18,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 02:00:18 BoogieIcfgContainer [2021-12-15 14:00:18,159 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-15 14:00:18,159 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-15 14:00:18,159 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-15 14:00:18,160 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-15 14:00:18,160 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 02:00:13" (3/4) ... [2021-12-15 14:00:18,162 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-15 14:00:18,162 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-15 14:00:18,162 INFO L158 Benchmark]: Toolchain (without parser) took 5643.77ms. Allocated memory was 60.8MB in the beginning and 79.7MB in the end (delta: 18.9MB). Free memory was 39.7MB in the beginning and 26.1MB in the end (delta: 13.6MB). Peak memory consumption was 32.0MB. Max. memory is 16.1GB. [2021-12-15 14:00:18,162 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 48.2MB. Free memory was 31.4MB in the beginning and 31.3MB in the end (delta: 73.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 14:00:18,163 INFO L158 Benchmark]: CACSL2BoogieTranslator took 387.35ms. Allocated memory is still 60.8MB. Free memory was 39.5MB in the beginning and 38.1MB in the end (delta: 1.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-15 14:00:18,163 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.62ms. Allocated memory is still 60.8MB. Free memory was 38.0MB in the beginning and 36.1MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 14:00:18,163 INFO L158 Benchmark]: Boogie Preprocessor took 34.53ms. Allocated memory is still 60.8MB. Free memory was 36.1MB in the beginning and 34.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 14:00:18,163 INFO L158 Benchmark]: RCFGBuilder took 408.83ms. Allocated memory is still 60.8MB. Free memory was 34.6MB in the beginning and 38.8MB in the end (delta: -4.2MB). Peak memory consumption was 10.3MB. Max. memory is 16.1GB. [2021-12-15 14:00:18,164 INFO L158 Benchmark]: TraceAbstraction took 4750.69ms. Allocated memory was 60.8MB in the beginning and 79.7MB in the end (delta: 18.9MB). Free memory was 38.3MB in the beginning and 26.1MB in the end (delta: 12.2MB). Peak memory consumption was 31.0MB. Max. memory is 16.1GB. [2021-12-15 14:00:18,164 INFO L158 Benchmark]: Witness Printer took 2.53ms. Allocated memory is still 79.7MB. Free memory is still 26.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 14:00:18,170 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 48.2MB. Free memory was 31.4MB in the beginning and 31.3MB in the end (delta: 73.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 387.35ms. Allocated memory is still 60.8MB. Free memory was 39.5MB in the beginning and 38.1MB in the end (delta: 1.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.62ms. Allocated memory is still 60.8MB. Free memory was 38.0MB in the beginning and 36.1MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.53ms. Allocated memory is still 60.8MB. Free memory was 36.1MB in the beginning and 34.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 408.83ms. Allocated memory is still 60.8MB. Free memory was 34.6MB in the beginning and 38.8MB in the end (delta: -4.2MB). Peak memory consumption was 10.3MB. Max. memory is 16.1GB. * TraceAbstraction took 4750.69ms. Allocated memory was 60.8MB in the beginning and 79.7MB in the end (delta: 18.9MB). Free memory was 38.3MB in the beginning and 26.1MB in the end (delta: 12.2MB). Peak memory consumption was 31.0MB. Max. memory is 16.1GB. * Witness Printer took 2.53ms. Allocated memory is still 79.7MB. Free memory is still 26.1MB. There was no memory consumed. 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 - UnprovableResult [Line: 543]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 543. Possible FailurePath: [L544] TData data; [L545] CALL alloc_data(&data) [L529] pdata->lo = malloc(16) VAL [malloc(16)={3:0}, pdata={-2147483646:0}, pdata={-2147483646:0}] [L530] pdata->hi = malloc(24) VAL [malloc(24)={4:0}, pdata={-2147483646:0}, pdata={-2147483646:0}] [L545] RET alloc_data(&data) [L546] CALL free_data(&data) [L534] EXPR data->lo VAL [data={-2147483646:0}, data={-2147483646:0}, data->lo={3:0}] [L534] void *lo = data->lo; [L535] EXPR data->hi VAL [data={-2147483646:0}, data={-2147483646:0}, data->hi={4:0}, lo={3:0}] [L535] void *hi = data->hi; [L536] COND FALSE !(lo == hi) VAL [data={-2147483646:0}, data={-2147483646:0}, hi={4:0}, lo={3:0}] [L540] data->lo = (void *) 0 VAL [data={-2147483646:0}, data={-2147483646:0}, hi={4:0}, lo={3:0}] [L541] data->hi = (void *) 0 VAL [data={-2147483646:0}, data={-2147483646:0}, hi={4:0}, lo={3:0}] [L546] RET free_data(&data) [L547] return 0; [L547] return 0; VAL [\result=0] - UnprovableResult [Line: 529]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 529]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 43 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 4.7s, OverallIterations: 9, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 355 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 355 mSDsluCounter, 372 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 47 IncrementalHoareTripleChecker+Unchecked, 205 mSDsCounter, 47 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 315 IncrementalHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 47 mSolverCounterUnsat, 167 mSDtfsCounter, 315 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=0, InterpolantAutomatonStates: 55, 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, 8 MinimizatonAttempts, 28 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 85 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 61 ConstructedInterpolants, 12 QuantifiedInterpolants, 568 SizeOfPredicates, 66 NumberOfNonLiveVariables, 546 ConjunctsInSsa, 100 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-15 14:00:18,197 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: UNKNOWN: Overapproximated counterexample