./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/verifythis/elimination_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 20ed64ec 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/verifythis/elimination_max.c -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 b909735efeb9bc00b7df4035956af92a753b9076 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 05:12:28,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 05:12:28,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 05:12:28,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 05:12:28,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 05:12:28,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 05:12:28,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 05:12:28,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 05:12:28,294 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 05:12:28,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 05:12:28,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 05:12:28,300 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 05:12:28,300 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 05:12:28,302 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 05:12:28,341 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 05:12:28,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 05:12:28,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 05:12:28,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 05:12:28,349 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 05:12:28,350 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 05:12:28,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 05:12:28,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 05:12:28,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 05:12:28,357 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 05:12:28,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 05:12:28,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 05:12:28,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 05:12:28,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 05:12:28,371 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 05:12:28,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 05:12:28,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 05:12:28,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 05:12:28,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 05:12:28,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 05:12:28,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 05:12:28,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 05:12:28,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 05:12:28,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 05:12:28,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 05:12:28,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 05:12:28,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 05:12:28,384 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 05:12:28,414 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 05:12:28,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 05:12:28,416 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 05:12:28,416 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 05:12:28,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 05:12:28,418 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 05:12:28,418 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 05:12:28,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 05:12:28,419 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 05:12:28,419 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 05:12:28,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 05:12:28,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 05:12:28,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 05:12:28,420 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 05:12:28,420 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 05:12:28,421 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 05:12:28,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 05:12:28,421 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 05:12:28,421 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 05:12:28,421 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 05:12:28,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 05:12:28,422 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 05:12:28,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 05:12:28,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:12:28,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 05:12:28,422 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 05:12:28,423 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 05:12:28,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 05:12:28,423 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 05:12:28,423 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b909735efeb9bc00b7df4035956af92a753b9076 [2021-08-27 05:12:28,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 05:12:28,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 05:12:28,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 05:12:28,775 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 05:12:28,776 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 05:12:28,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/elimination_max.c [2021-08-27 05:12:28,847 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2569a03cd/a9f7b70d7c15495888b5dc8ccfe5c63f/FLAG24e8416be [2021-08-27 05:12:29,206 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 05:12:29,207 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max.c [2021-08-27 05:12:29,212 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2569a03cd/a9f7b70d7c15495888b5dc8ccfe5c63f/FLAG24e8416be [2021-08-27 05:12:29,635 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2569a03cd/a9f7b70d7c15495888b5dc8ccfe5c63f [2021-08-27 05:12:29,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 05:12:29,639 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 05:12:29,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 05:12:29,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 05:12:29,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 05:12:29,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:12:29" (1/1) ... [2021-08-27 05:12:29,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@341132a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:12:29, skipping insertion in model container [2021-08-27 05:12:29,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:12:29" (1/1) ... [2021-08-27 05:12:29,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 05:12:29,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 05:12:29,797 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max.c[485,498] [2021-08-27 05:12:29,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:12:29,829 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 05:12:29,842 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max.c[485,498] [2021-08-27 05:12:29,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:12:29,880 INFO L208 MainTranslator]: Completed translation [2021-08-27 05:12:29,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:12:29 WrapperNode [2021-08-27 05:12:29,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 05:12:29,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 05:12:29,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 05:12:29,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 05:12:29,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:12:29" (1/1) ... [2021-08-27 05:12:29,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:12:29" (1/1) ... [2021-08-27 05:12:29,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:12:29" (1/1) ... [2021-08-27 05:12:29,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:12:29" (1/1) ... [2021-08-27 05:12:29,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:12:29" (1/1) ... [2021-08-27 05:12:29,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:12:29" (1/1) ... [2021-08-27 05:12:29,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:12:29" (1/1) ... [2021-08-27 05:12:29,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 05:12:29,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 05:12:29,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 05:12:29,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 05:12:29,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:12:29" (1/1) ... [2021-08-27 05:12:29,953 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:12:29,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:12:29,973 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) [2021-08-27 05:12:30,004 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 [2021-08-27 05:12:30,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 05:12:30,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 05:12:30,036 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 05:12:30,036 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-08-27 05:12:30,037 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-08-27 05:12:30,037 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 05:12:30,038 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-08-27 05:12:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 05:12:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 05:12:30,040 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 05:12:30,040 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 05:12:30,040 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 05:12:30,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 05:12:30,040 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-08-27 05:12:30,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-08-27 05:12:30,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 05:12:30,041 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 05:12:30,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 05:12:30,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-08-27 05:12:30,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 05:12:30,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 05:12:30,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 05:12:30,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 05:12:30,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 05:12:30,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 05:12:30,474 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 05:12:30,474 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-27 05:12:30,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:12:30 BoogieIcfgContainer [2021-08-27 05:12:30,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 05:12:30,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 05:12:30,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 05:12:30,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 05:12:30,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 05:12:29" (1/3) ... [2021-08-27 05:12:30,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30522e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:12:30, skipping insertion in model container [2021-08-27 05:12:30,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:12:29" (2/3) ... [2021-08-27 05:12:30,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30522e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:12:30, skipping insertion in model container [2021-08-27 05:12:30,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:12:30" (3/3) ... [2021-08-27 05:12:30,483 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max.c [2021-08-27 05:12:30,488 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 05:12:30,490 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2021-08-27 05:12:30,527 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 05:12:30,533 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, mConcurrency=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 [2021-08-27 05:12:30,534 INFO L340 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2021-08-27 05:12:30,547 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 32 states have (on average 1.75) internal successors, (56), 49 states have internal predecessors, (56), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-27 05:12:30,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 05:12:30,554 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:12:30,554 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:12:30,555 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 12 more)] === [2021-08-27 05:12:30,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:12:30,560 INFO L82 PathProgramCache]: Analyzing trace with hash 196538333, now seen corresponding path program 1 times [2021-08-27 05:12:30,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:12:30,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491819960] [2021-08-27 05:12:30,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:30,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:12:30,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:30,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:12:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:30,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:12:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:30,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:12:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:12:30,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:12:30,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491819960] [2021-08-27 05:12:30,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491819960] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:12:30,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:12:30,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 05:12:30,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732554024] [2021-08-27 05:12:30,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:12:30,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:12:30,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:12:30,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:12:30,908 INFO L87 Difference]: Start difference. First operand has 62 states, 32 states have (on average 1.75) internal successors, (56), 49 states have internal predecessors, (56), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 05:12:31,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:12:31,186 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-08-27 05:12:31,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 05:12:31,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2021-08-27 05:12:31,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:12:31,194 INFO L225 Difference]: With dead ends: 62 [2021-08-27 05:12:31,194 INFO L226 Difference]: Without dead ends: 59 [2021-08-27 05:12:31,195 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:12:31,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-27 05:12:31,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-08-27 05:12:31,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 47 states have internal predecessors, (50), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-27 05:12:31,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-08-27 05:12:31,225 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 19 [2021-08-27 05:12:31,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:12:31,226 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-08-27 05:12:31,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 05:12:31,226 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-08-27 05:12:31,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 05:12:31,228 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:12:31,228 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:12:31,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 05:12:31,228 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 12 more)] === [2021-08-27 05:12:31,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:12:31,229 INFO L82 PathProgramCache]: Analyzing trace with hash 897602911, now seen corresponding path program 1 times [2021-08-27 05:12:31,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:12:31,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493372117] [2021-08-27 05:12:31,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:31,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:12:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:31,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:12:31,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:31,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:12:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:31,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:12:31,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:12:31,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:12:31,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493372117] [2021-08-27 05:12:31,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493372117] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:12:31,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:12:31,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 05:12:31,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703387961] [2021-08-27 05:12:31,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:12:31,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:12:31,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:12:31,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:12:31,393 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 05:12:31,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:12:31,735 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-08-27 05:12:31,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 05:12:31,736 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2021-08-27 05:12:31,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:12:31,737 INFO L225 Difference]: With dead ends: 52 [2021-08-27 05:12:31,737 INFO L226 Difference]: Without dead ends: 52 [2021-08-27 05:12:31,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:12:31,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-27 05:12:31,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-08-27 05:12:31,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 40 states have internal predecessors, (43), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-27 05:12:31,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-08-27 05:12:31,744 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 19 [2021-08-27 05:12:31,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:12:31,746 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-08-27 05:12:31,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 05:12:31,746 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-08-27 05:12:31,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 05:12:31,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:12:31,747 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:12:31,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 05:12:31,747 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 12 more)] === [2021-08-27 05:12:31,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:12:31,748 INFO L82 PathProgramCache]: Analyzing trace with hash 897602912, now seen corresponding path program 1 times [2021-08-27 05:12:31,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:12:31,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202179813] [2021-08-27 05:12:31,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:31,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:12:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:31,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:12:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:31,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:12:31,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:31,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:12:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:12:31,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:12:31,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202179813] [2021-08-27 05:12:31,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202179813] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:12:31,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:12:31,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 05:12:31,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144044941] [2021-08-27 05:12:31,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 05:12:31,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:12:31,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 05:12:31,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 05:12:31,956 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 05:12:32,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:12:32,466 INFO L93 Difference]: Finished difference Result 100 states and 113 transitions. [2021-08-27 05:12:32,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 05:12:32,467 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2021-08-27 05:12:32,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:12:32,469 INFO L225 Difference]: With dead ends: 100 [2021-08-27 05:12:32,469 INFO L226 Difference]: Without dead ends: 100 [2021-08-27 05:12:32,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 186.0ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-27 05:12:32,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-27 05:12:32,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2021-08-27 05:12:32,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 64 states have internal predecessors, (79), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-08-27 05:12:32,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2021-08-27 05:12:32,483 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 19 [2021-08-27 05:12:32,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:12:32,483 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2021-08-27 05:12:32,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 05:12:32,483 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2021-08-27 05:12:32,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 05:12:32,484 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:12:32,484 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:12:32,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 05:12:32,485 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 12 more)] === [2021-08-27 05:12:32,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:12:32,485 INFO L82 PathProgramCache]: Analyzing trace with hash 2055886463, now seen corresponding path program 1 times [2021-08-27 05:12:32,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:12:32,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090144333] [2021-08-27 05:12:32,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:32,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:12:32,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:32,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:12:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:32,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:12:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:32,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:12:32,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:32,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:12:32,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:12:32,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090144333] [2021-08-27 05:12:32,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090144333] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:12:32,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:12:32,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 05:12:32,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716419661] [2021-08-27 05:12:32,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 05:12:32,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:12:32,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 05:12:32,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-27 05:12:32,629 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 05:12:33,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:12:33,103 INFO L93 Difference]: Finished difference Result 118 states and 139 transitions. [2021-08-27 05:12:33,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 05:12:33,103 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2021-08-27 05:12:33,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:12:33,105 INFO L225 Difference]: With dead ends: 118 [2021-08-27 05:12:33,105 INFO L226 Difference]: Without dead ends: 118 [2021-08-27 05:12:33,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-27 05:12:33,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-08-27 05:12:33,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 86. [2021-08-27 05:12:33,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 68 states have internal predecessors, (85), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-08-27 05:12:33,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 110 transitions. [2021-08-27 05:12:33,113 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 110 transitions. Word has length 20 [2021-08-27 05:12:33,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:12:33,114 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 110 transitions. [2021-08-27 05:12:33,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 05:12:33,114 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 110 transitions. [2021-08-27 05:12:33,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-27 05:12:33,115 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:12:33,115 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:12:33,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 05:12:33,115 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 12 more)] === [2021-08-27 05:12:33,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:12:33,116 INFO L82 PathProgramCache]: Analyzing trace with hash 679950182, now seen corresponding path program 1 times [2021-08-27 05:12:33,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:12:33,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074815338] [2021-08-27 05:12:33,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:33,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:12:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:33,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:12:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:33,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:12:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:33,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:12:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:12:33,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:12:33,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074815338] [2021-08-27 05:12:33,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074815338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:12:33,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141872375] [2021-08-27 05:12:33,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:33,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:12:33,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:12:33,345 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:12:33,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 05:12:33,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:33,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 05:12:33,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:12:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:12:33,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141872375] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:12:33,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 05:12:33,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 13 [2021-08-27 05:12:33,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092579247] [2021-08-27 05:12:33,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 05:12:33,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:12:33,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 05:12:33,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-27 05:12:33,679 INFO L87 Difference]: Start difference. First operand 86 states and 110 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 05:12:33,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:12:33,909 INFO L93 Difference]: Finished difference Result 139 states and 166 transitions. [2021-08-27 05:12:33,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 05:12:33,909 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-08-27 05:12:33,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:12:33,915 INFO L225 Difference]: With dead ends: 139 [2021-08-27 05:12:33,916 INFO L226 Difference]: Without dead ends: 139 [2021-08-27 05:12:33,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 197.5ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-27 05:12:33,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-08-27 05:12:33,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 98. [2021-08-27 05:12:33,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 69 states have (on average 1.4057971014492754) internal successors, (97), 77 states have internal predecessors, (97), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-08-27 05:12:33,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 128 transitions. [2021-08-27 05:12:33,946 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 128 transitions. Word has length 23 [2021-08-27 05:12:33,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:12:33,946 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 128 transitions. [2021-08-27 05:12:33,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 05:12:33,947 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 128 transitions. [2021-08-27 05:12:33,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-27 05:12:33,947 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:12:33,947 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:12:33,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-27 05:12:34,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:12:34,148 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 12 more)] === [2021-08-27 05:12:34,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:12:34,149 INFO L82 PathProgramCache]: Analyzing trace with hash -427768041, now seen corresponding path program 1 times [2021-08-27 05:12:34,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:12:34,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51037855] [2021-08-27 05:12:34,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:34,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:12:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:34,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:12:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:34,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:12:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:34,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:12:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:34,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-27 05:12:34,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:12:34,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:12:34,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51037855] [2021-08-27 05:12:34,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51037855] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:12:34,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:12:34,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 05:12:34,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836894676] [2021-08-27 05:12:34,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 05:12:34,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:12:34,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 05:12:34,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:12:34,294 INFO L87 Difference]: Start difference. First operand 98 states and 128 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 05:12:34,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:12:34,614 INFO L93 Difference]: Finished difference Result 104 states and 131 transitions. [2021-08-27 05:12:34,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 05:12:34,615 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2021-08-27 05:12:34,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:12:34,616 INFO L225 Difference]: With dead ends: 104 [2021-08-27 05:12:34,616 INFO L226 Difference]: Without dead ends: 104 [2021-08-27 05:12:34,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 178.0ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-27 05:12:34,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-27 05:12:34,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 75. [2021-08-27 05:12:34,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 60 states have internal predecessors, (71), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-27 05:12:34,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2021-08-27 05:12:34,623 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 25 [2021-08-27 05:12:34,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:12:34,623 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2021-08-27 05:12:34,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 05:12:34,623 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2021-08-27 05:12:34,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-27 05:12:34,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:12:34,624 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:12:34,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 05:12:34,625 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 12 more)] === [2021-08-27 05:12:34,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:12:34,625 INFO L82 PathProgramCache]: Analyzing trace with hash -375907399, now seen corresponding path program 1 times [2021-08-27 05:12:34,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:12:34,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809240927] [2021-08-27 05:12:34,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:34,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:12:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:34,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:12:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:34,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:12:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:34,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:12:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:34,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-27 05:12:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 05:12:34,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:12:34,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809240927] [2021-08-27 05:12:34,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809240927] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:12:34,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:12:34,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 05:12:34,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897125155] [2021-08-27 05:12:34,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 05:12:34,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:12:34,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 05:12:34,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-27 05:12:34,724 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 05:12:34,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:12:34,962 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2021-08-27 05:12:34,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 05:12:34,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2021-08-27 05:12:34,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:12:34,964 INFO L225 Difference]: With dead ends: 111 [2021-08-27 05:12:34,964 INFO L226 Difference]: Without dead ends: 111 [2021-08-27 05:12:34,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-27 05:12:34,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-27 05:12:34,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 74. [2021-08-27 05:12:34,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 59 states have internal predecessors, (69), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-27 05:12:34,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2021-08-27 05:12:34,969 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 26 [2021-08-27 05:12:34,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:12:34,970 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2021-08-27 05:12:34,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 05:12:34,970 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2021-08-27 05:12:34,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-27 05:12:34,971 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:12:34,971 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:12:34,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 05:12:34,972 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 12 more)] === [2021-08-27 05:12:34,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:12:34,972 INFO L82 PathProgramCache]: Analyzing trace with hash -464219130, now seen corresponding path program 1 times [2021-08-27 05:12:34,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:12:34,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291734016] [2021-08-27 05:12:34,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:34,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:12:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:35,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:12:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:35,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:12:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:35,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:12:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:35,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-27 05:12:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 05:12:35,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:12:35,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291734016] [2021-08-27 05:12:35,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291734016] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:12:35,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:12:35,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-08-27 05:12:35,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579664538] [2021-08-27 05:12:35,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-27 05:12:35,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:12:35,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-27 05:12:35,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-08-27 05:12:35,162 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 05:12:35,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:12:35,573 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2021-08-27 05:12:35,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 05:12:35,574 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-08-27 05:12:35,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:12:35,574 INFO L225 Difference]: With dead ends: 78 [2021-08-27 05:12:35,575 INFO L226 Difference]: Without dead ends: 78 [2021-08-27 05:12:35,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 265.6ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-08-27 05:12:35,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-27 05:12:35,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-08-27 05:12:35,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 62 states have internal predecessors, (72), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-27 05:12:35,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2021-08-27 05:12:35,580 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 30 [2021-08-27 05:12:35,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:12:35,580 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2021-08-27 05:12:35,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 05:12:35,580 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2021-08-27 05:12:35,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-27 05:12:35,581 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:12:35,581 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:12:35,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 05:12:35,582 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 12 more)] === [2021-08-27 05:12:35,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:12:35,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1701572687, now seen corresponding path program 1 times [2021-08-27 05:12:35,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:12:35,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161799877] [2021-08-27 05:12:35,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:35,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:12:35,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:35,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:12:35,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:35,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:12:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:35,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:12:35,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:12:35,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:12:35,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161799877] [2021-08-27 05:12:35,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161799877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:12:35,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682551537] [2021-08-27 05:12:35,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:35,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:12:35,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:12:35,710 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:12:35,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-27 05:12:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:35,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 05:12:35,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:12:36,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:12:36,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682551537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:12:36,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:12:36,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 16 [2021-08-27 05:12:36,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945613944] [2021-08-27 05:12:36,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-27 05:12:36,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:12:36,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-27 05:12:36,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-27 05:12:36,143 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 05:12:36,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:12:36,753 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2021-08-27 05:12:36,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 05:12:36,753 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-08-27 05:12:36,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:12:36,754 INFO L225 Difference]: With dead ends: 79 [2021-08-27 05:12:36,754 INFO L226 Difference]: Without dead ends: 79 [2021-08-27 05:12:36,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 395.6ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-08-27 05:12:36,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-27 05:12:36,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-08-27 05:12:36,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 53 states have internal predecessors, (58), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-27 05:12:36,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2021-08-27 05:12:36,759 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 28 [2021-08-27 05:12:36,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:12:36,759 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2021-08-27 05:12:36,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 05:12:36,760 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2021-08-27 05:12:36,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-27 05:12:36,760 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:12:36,760 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:12:36,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-27 05:12:36,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-08-27 05:12:36,984 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 12 more)] === [2021-08-27 05:12:36,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:12:36,985 INFO L82 PathProgramCache]: Analyzing trace with hash -592050445, now seen corresponding path program 1 times [2021-08-27 05:12:36,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:12:36,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177540951] [2021-08-27 05:12:36,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:36,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:12:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:37,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:12:37,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:37,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:12:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:37,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:12:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:37,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-27 05:12:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 05:12:37,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:12:37,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177540951] [2021-08-27 05:12:37,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177540951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:12:37,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486552118] [2021-08-27 05:12:37,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:37,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:12:37,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:12:37,131 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:12:37,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-27 05:12:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:37,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 05:12:37,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:12:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:12:37,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486552118] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:12:37,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 05:12:37,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2021-08-27 05:12:37,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022661323] [2021-08-27 05:12:37,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 05:12:37,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:12:37,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 05:12:37,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-27 05:12:37,660 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 05:12:39,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:12:39,688 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2021-08-27 05:12:39,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 05:12:39,689 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2021-08-27 05:12:39,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:12:39,690 INFO L225 Difference]: With dead ends: 91 [2021-08-27 05:12:39,691 INFO L226 Difference]: Without dead ends: 91 [2021-08-27 05:12:39,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 323.8ms TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-08-27 05:12:39,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-27 05:12:39,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 59. [2021-08-27 05:12:39,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.146341463414634) internal successors, (47), 45 states have internal predecessors, (47), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-27 05:12:39,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-08-27 05:12:39,696 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 30 [2021-08-27 05:12:39,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:12:39,698 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-08-27 05:12:39,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 05:12:39,699 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-08-27 05:12:39,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-27 05:12:39,705 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:12:39,705 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:12:39,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-27 05:12:39,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:12:39,929 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 12 more)] === [2021-08-27 05:12:39,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:12:39,930 INFO L82 PathProgramCache]: Analyzing trace with hash -2031616009, now seen corresponding path program 1 times [2021-08-27 05:12:39,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:12:39,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642656583] [2021-08-27 05:12:39,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:39,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:12:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:40,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:12:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:40,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:12:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:40,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:12:40,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:40,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-27 05:12:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:40,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-08-27 05:12:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 05:12:40,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:12:40,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642656583] [2021-08-27 05:12:40,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642656583] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:12:40,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:12:40,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-08-27 05:12:40,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529201004] [2021-08-27 05:12:40,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 05:12:40,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:12:40,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 05:12:40,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-08-27 05:12:40,154 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-08-27 05:12:40,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:12:40,571 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2021-08-27 05:12:40,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 05:12:40,571 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2021-08-27 05:12:40,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:12:40,574 INFO L225 Difference]: With dead ends: 57 [2021-08-27 05:12:40,574 INFO L226 Difference]: Without dead ends: 57 [2021-08-27 05:12:40,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 292.4ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-08-27 05:12:40,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-27 05:12:40,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-08-27 05:12:40,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 40 states have (on average 1.125) internal successors, (45), 43 states have internal predecessors, (45), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-27 05:12:40,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2021-08-27 05:12:40,583 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 39 [2021-08-27 05:12:40,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:12:40,583 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2021-08-27 05:12:40,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-08-27 05:12:40,584 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2021-08-27 05:12:40,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-27 05:12:40,586 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:12:40,587 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:12:40,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-27 05:12:40,587 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 12 more)] === [2021-08-27 05:12:40,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:12:40,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1555377525, now seen corresponding path program 1 times [2021-08-27 05:12:40,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:12:40,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674983883] [2021-08-27 05:12:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:40,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:12:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:40,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:12:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:40,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:12:40,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:40,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:12:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:40,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-27 05:12:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:40,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-08-27 05:12:40,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:40,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-08-27 05:12:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-27 05:12:40,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:12:40,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674983883] [2021-08-27 05:12:40,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674983883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:12:40,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492834349] [2021-08-27 05:12:40,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:40,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:12:40,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:12:40,744 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:12:40,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-27 05:12:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:40,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 05:12:40,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:12:41,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-27 05:12:41,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492834349] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:12:41,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 05:12:41,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2021-08-27 05:12:41,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711984022] [2021-08-27 05:12:41,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:12:41,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:12:41,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:12:41,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-27 05:12:41,201 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-27 05:12:41,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:12:41,290 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2021-08-27 05:12:41,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 05:12:41,291 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 44 [2021-08-27 05:12:41,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:12:41,291 INFO L225 Difference]: With dead ends: 77 [2021-08-27 05:12:41,292 INFO L226 Difference]: Without dead ends: 77 [2021-08-27 05:12:41,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-08-27 05:12:41,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-27 05:12:41,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2021-08-27 05:12:41,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 51 states have internal predecessors, (54), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-27 05:12:41,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2021-08-27 05:12:41,295 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 44 [2021-08-27 05:12:41,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:12:41,296 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2021-08-27 05:12:41,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-27 05:12:41,296 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2021-08-27 05:12:41,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-27 05:12:41,297 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:12:41,297 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:12:41,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-27 05:12:41,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:12:41,513 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr13ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 12 more)] === [2021-08-27 05:12:41,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:12:41,513 INFO L82 PathProgramCache]: Analyzing trace with hash 972061541, now seen corresponding path program 1 times [2021-08-27 05:12:41,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:12:41,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036944912] [2021-08-27 05:12:41,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:41,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:12:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:41,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:12:41,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:41,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:12:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:41,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:12:41,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:41,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-27 05:12:41,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:41,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-08-27 05:12:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:41,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-08-27 05:12:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:41,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-27 05:12:41,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:12:41,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036944912] [2021-08-27 05:12:41,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036944912] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:12:41,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:12:41,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 05:12:41,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341102485] [2021-08-27 05:12:41,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:12:41,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:12:41,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:12:41,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:12:41,623 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-27 05:12:41,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:12:41,762 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2021-08-27 05:12:41,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 05:12:41,763 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 45 [2021-08-27 05:12:41,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:12:41,763 INFO L225 Difference]: With dead ends: 67 [2021-08-27 05:12:41,763 INFO L226 Difference]: Without dead ends: 67 [2021-08-27 05:12:41,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:12:41,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-27 05:12:41,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-08-27 05:12:41,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 50 states have internal predecessors, (53), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-27 05:12:41,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2021-08-27 05:12:41,767 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 45 [2021-08-27 05:12:41,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:12:41,767 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2021-08-27 05:12:41,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-27 05:12:41,768 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2021-08-27 05:12:41,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-27 05:12:41,768 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:12:41,769 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:12:41,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-27 05:12:41,769 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr15ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 12 more)] === [2021-08-27 05:12:41,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:12:41,770 INFO L82 PathProgramCache]: Analyzing trace with hash 2143241032, now seen corresponding path program 1 times [2021-08-27 05:12:41,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:12:41,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636853821] [2021-08-27 05:12:41,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:41,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:12:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:41,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:12:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:41,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:12:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:41,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:12:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:41,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-08-27 05:12:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:41,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-08-27 05:12:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:41,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-08-27 05:12:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-27 05:12:41,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:12:41,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636853821] [2021-08-27 05:12:41,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636853821] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:12:41,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:12:41,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 05:12:41,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803791249] [2021-08-27 05:12:41,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 05:12:41,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:12:41,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 05:12:41,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-27 05:12:41,871 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-27 05:12:42,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:12:42,030 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2021-08-27 05:12:42,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 05:12:42,031 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 47 [2021-08-27 05:12:42,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:12:42,032 INFO L225 Difference]: With dead ends: 66 [2021-08-27 05:12:42,032 INFO L226 Difference]: Without dead ends: 45 [2021-08-27 05:12:42,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-27 05:12:42,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-27 05:12:42,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-08-27 05:12:42,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-27 05:12:42,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-08-27 05:12:42,035 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 47 [2021-08-27 05:12:42,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:12:42,035 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-08-27 05:12:42,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-27 05:12:42,036 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-08-27 05:12:42,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-27 05:12:42,036 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:12:42,036 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:12:42,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-27 05:12:42,037 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 12 more)] === [2021-08-27 05:12:42,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:12:42,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1561821649, now seen corresponding path program 1 times [2021-08-27 05:12:42,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:12:42,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959771816] [2021-08-27 05:12:42,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:42,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:12:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:42,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:12:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:42,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:12:42,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:42,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:12:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:42,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-27 05:12:42,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:42,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-08-27 05:12:42,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:42,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-08-27 05:12:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-27 05:12:42,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:12:42,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959771816] [2021-08-27 05:12:42,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959771816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:12:42,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958467263] [2021-08-27 05:12:42,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:42,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:12:42,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:12:42,213 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:12:42,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-27 05:12:42,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:42,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-27 05:12:42,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:12:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 05:12:43,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958467263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:12:43,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:12:43,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2021-08-27 05:12:43,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745093800] [2021-08-27 05:12:43,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-27 05:12:43,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:12:43,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-27 05:12:43,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-27 05:12:43,066 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 7 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-08-27 05:12:43,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:12:43,537 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2021-08-27 05:12:43,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 05:12:43,538 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 7 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 48 [2021-08-27 05:12:43,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:12:43,538 INFO L225 Difference]: With dead ends: 58 [2021-08-27 05:12:43,538 INFO L226 Difference]: Without dead ends: 58 [2021-08-27 05:12:43,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 441.1ms TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-08-27 05:12:43,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-27 05:12:43,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2021-08-27 05:12:43,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-27 05:12:43,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2021-08-27 05:12:43,542 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 48 [2021-08-27 05:12:43,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:12:43,542 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2021-08-27 05:12:43,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 7 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-08-27 05:12:43,542 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2021-08-27 05:12:43,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-27 05:12:43,543 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:12:43,543 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:12:43,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-27 05:12:43,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-27 05:12:43,749 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 12 more)] === [2021-08-27 05:12:43,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:12:43,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1348635696, now seen corresponding path program 2 times [2021-08-27 05:12:43,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:12:43,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991864695] [2021-08-27 05:12:43,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:43,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:12:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:43,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:12:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:43,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:12:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:43,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:12:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:43,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-27 05:12:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:43,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-08-27 05:12:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:43,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-08-27 05:12:43,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:43,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-27 05:12:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:43,884 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-27 05:12:43,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:12:43,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991864695] [2021-08-27 05:12:43,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991864695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:12:43,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81103610] [2021-08-27 05:12:43,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 05:12:43,885 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:12:43,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:12:43,889 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:12:43,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-27 05:12:44,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 05:12:44,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:12:44,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 05:12:44,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:12:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-27 05:12:44,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81103610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:12:44,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:12:44,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-27 05:12:44,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977588860] [2021-08-27 05:12:44,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-27 05:12:44,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:12:44,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-27 05:12:44,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-27 05:12:44,390 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 13 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-08-27 05:12:44,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:12:44,683 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2021-08-27 05:12:44,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 05:12:44,684 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 13 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 58 [2021-08-27 05:12:44,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:12:44,684 INFO L225 Difference]: With dead ends: 77 [2021-08-27 05:12:44,684 INFO L226 Difference]: Without dead ends: 58 [2021-08-27 05:12:44,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 176.6ms TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-08-27 05:12:44,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-27 05:12:44,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2021-08-27 05:12:44,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-27 05:12:44,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-08-27 05:12:44,687 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 58 [2021-08-27 05:12:44,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:12:44,688 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-08-27 05:12:44,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 13 states have internal predecessors, (54), 6 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-08-27 05:12:44,688 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-08-27 05:12:44,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-27 05:12:44,689 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:12:44,689 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:12:44,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-27 05:12:44,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-27 05:12:44,893 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 12 more)] === [2021-08-27 05:12:44,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:12:44,893 INFO L82 PathProgramCache]: Analyzing trace with hash 2066741002, now seen corresponding path program 3 times [2021-08-27 05:12:44,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:12:44,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915107487] [2021-08-27 05:12:44,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:44,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:12:44,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:45,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:12:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:45,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:12:45,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:45,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:12:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:45,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-08-27 05:12:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:45,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-27 05:12:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:45,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-08-27 05:12:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:45,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-08-27 05:12:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-27 05:12:45,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:12:45,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915107487] [2021-08-27 05:12:45,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915107487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:12:45,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526329442] [2021-08-27 05:12:45,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 05:12:45,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:12:45,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:12:45,108 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:12:45,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-27 05:12:45,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-27 05:12:45,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:12:45,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 05:12:45,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:12:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-08-27 05:12:45,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526329442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:12:45,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:12:45,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 17 [2021-08-27 05:12:45,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977542871] [2021-08-27 05:12:45,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-27 05:12:45,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:12:45,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-27 05:12:45,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-08-27 05:12:45,705 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 18 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 8 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2021-08-27 05:12:46,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:12:46,341 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2021-08-27 05:12:46,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-27 05:12:46,342 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 8 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 62 [2021-08-27 05:12:46,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:12:46,342 INFO L225 Difference]: With dead ends: 64 [2021-08-27 05:12:46,342 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 05:12:46,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 494.9ms TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-08-27 05:12:46,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 05:12:46,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 05:12:46,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 05:12:46,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 05:12:46,343 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2021-08-27 05:12:46,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:12:46,343 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 05:12:46,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 8 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2021-08-27 05:12:46,343 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 05:12:46,344 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 05:12:46,346 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-08-27 05:12:46,346 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-08-27 05:12:46,346 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-08-27 05:12:46,346 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-08-27 05:12:46,346 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION [2021-08-27 05:12:46,346 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION [2021-08-27 05:12:46,347 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION [2021-08-27 05:12:46,347 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION [2021-08-27 05:12:46,347 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8REQUIRES_VIOLATION [2021-08-27 05:12:46,347 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr9REQUIRES_VIOLATION [2021-08-27 05:12:46,347 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr10REQUIRES_VIOLATION [2021-08-27 05:12:46,347 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr11REQUIRES_VIOLATION [2021-08-27 05:12:46,347 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr12ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:12:46,347 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr13ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:12:46,347 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr14ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:12:46,347 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr15ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 05:12:46,347 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 05:12:46,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-08-27 05:12:46,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:12:46,578 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 05:12:46,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 05:12:46 BoogieIcfgContainer [2021-08-27 05:12:46,580 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 05:12:46,581 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 05:12:46,581 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 05:12:46,581 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 05:12:46,581 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:12:30" (3/4) ... [2021-08-27 05:12:46,589 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 05:12:46,596 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-08-27 05:12:46,596 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 05:12:46,597 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-08-27 05:12:46,597 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 05:12:46,597 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-08-27 05:12:46,597 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure #Ultimate.meminit [2021-08-27 05:12:46,605 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-08-27 05:12:46,605 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-08-27 05:12:46,606 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-08-27 05:12:46,606 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 05:12:46,632 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 05:12:46,632 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 05:12:46,634 INFO L168 Benchmark]: Toolchain (without parser) took 16993.73 ms. Allocated memory was 54.5 MB in the beginning and 144.7 MB in the end (delta: 90.2 MB). Free memory was 31.7 MB in the beginning and 64.7 MB in the end (delta: -33.0 MB). Peak memory consumption was 55.6 MB. Max. memory is 16.1 GB. [2021-08-27 05:12:46,634 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 54.5 MB. Free memory was 36.8 MB in the beginning and 36.8 MB in the end (delta: 36.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 05:12:46,634 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.42 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.5 MB in the beginning and 51.1 MB in the end (delta: -19.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2021-08-27 05:12:46,635 INFO L168 Benchmark]: Boogie Preprocessor took 62.56 ms. Allocated memory is still 67.1 MB. Free memory was 51.1 MB in the beginning and 49.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 05:12:46,635 INFO L168 Benchmark]: RCFGBuilder took 531.10 ms. Allocated memory is still 67.1 MB. Free memory was 49.4 MB in the beginning and 43.6 MB in the end (delta: 5.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-08-27 05:12:46,635 INFO L168 Benchmark]: TraceAbstraction took 16102.37 ms. Allocated memory was 67.1 MB in the beginning and 144.7 MB in the end (delta: 77.6 MB). Free memory was 43.2 MB in the beginning and 68.7 MB in the end (delta: -25.6 MB). Peak memory consumption was 55.2 MB. Max. memory is 16.1 GB. [2021-08-27 05:12:46,636 INFO L168 Benchmark]: Witness Printer took 51.92 ms. Allocated memory is still 144.7 MB. Free memory was 68.7 MB in the beginning and 64.7 MB in the end (delta: 4.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 05:12:46,637 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 54.5 MB. Free memory was 36.8 MB in the beginning and 36.8 MB in the end (delta: 36.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 238.42 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.5 MB in the beginning and 51.1 MB in the end (delta: -19.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 62.56 ms. Allocated memory is still 67.1 MB. Free memory was 51.1 MB in the beginning and 49.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 531.10 ms. Allocated memory is still 67.1 MB. Free memory was 49.4 MB in the beginning and 43.6 MB in the end (delta: 5.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 16102.37 ms. Allocated memory was 67.1 MB in the beginning and 144.7 MB in the end (delta: 77.6 MB). Free memory was 43.2 MB in the beginning and 68.7 MB in the end (delta: -25.6 MB). Peak memory consumption was 55.2 MB. Max. memory is 16.1 GB. * Witness Printer took 51.92 ms. Allocated memory is still 144.7 MB. Free memory was 68.7 MB in the beginning and 64.7 MB in the end (delta: 4.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 43]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 43]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 43]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 43]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 46]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 46]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 46]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 46]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 16]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 65 locations, 17 error locations. Started 1 CEGAR loops. OverallTime: 16050.4ms, OverallIterations: 17, TraceHistogramMax: 3, EmptinessCheckTime: 29.0ms, AutomataDifference: 7724.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 631 SDtfs, 1537 SDslu, 1254 SDs, 0 SdLazy, 3998 SolverSat, 615 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 4710.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 655 GetRequests, 397 SyntacticMatches, 6 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 3722.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred in iteration=5, InterpolantAutomatonStates: 174, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 119.8ms AutomataMinimizationTime, 17 MinimizatonAttempts, 218 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 100.4ms SsaConstructionTime, 406.5ms SatisfiabilityAnalysisTime, 5134.2ms InterpolantComputationTime, 875 NumberOfCodeBlocks, 858 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 851 ConstructedInterpolants, 16 QuantifiedInterpolants, 4526 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1256 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 24 InterpolantComputations, 13 PerfectInterpolantSequences, 185/230 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 17 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-27 05:12:46,669 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...