./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0232-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0232-3.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 79c869b9530d3ec4745fdd0d6c1ca37b23d5c5fc .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free) --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-30 17:05:57,748 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 17:05:57,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 17:05:57,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 17:05:57,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 17:05:57,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 17:05:57,802 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 17:05:57,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 17:05:57,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 17:05:57,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 17:05:57,813 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 17:05:57,816 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 17:05:57,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 17:05:57,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 17:05:57,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 17:05:57,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 17:05:57,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 17:05:57,824 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 17:05:57,825 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 17:05:57,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 17:05:57,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 17:05:57,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 17:05:57,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 17:05:57,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 17:05:57,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 17:05:57,836 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 17:05:57,836 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 17:05:57,837 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 17:05:57,837 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 17:05:57,838 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 17:05:57,838 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 17:05:57,839 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 17:05:57,840 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 17:05:57,840 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 17:05:57,841 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 17:05:57,841 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 17:05:57,842 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 17:05:57,842 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 17:05:57,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 17:05:57,843 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 17:05:57,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 17:05:57,844 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-30 17:05:57,870 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 17:05:57,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 17:05:57,871 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 17:05:57,871 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 17:05:57,874 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 17:05:57,874 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 17:05:57,874 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 17:05:57,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 17:05:57,874 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 17:05:57,875 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 17:05:57,875 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 17:05:57,875 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 17:05:57,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 17:05:57,876 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 17:05:57,876 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 17:05:57,876 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 17:05:57,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 17:05:57,876 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 17:05:57,876 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 17:05:57,877 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 17:05:57,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 17:05:57,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 17:05:57,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 17:05:57,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 17:05:57,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 17:05:57,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 17:05:57,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 17:05:57,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 17:05:57,878 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 17:05:57,878 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79c869b9530d3ec4745fdd0d6c1ca37b23d5c5fc [2021-08-30 17:05:58,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 17:05:58,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 17:05:58,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 17:05:58,118 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 17:05:58,118 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 17:05:58,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0232-3.i [2021-08-30 17:05:58,167 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73f11b53e/f42101f7300b4056a22147590e3d0b79/FLAG73eaf0f31 [2021-08-30 17:05:58,555 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 17:05:58,555 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0232-3.i [2021-08-30 17:05:58,562 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73f11b53e/f42101f7300b4056a22147590e3d0b79/FLAG73eaf0f31 [2021-08-30 17:05:58,945 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73f11b53e/f42101f7300b4056a22147590e3d0b79 [2021-08-30 17:05:58,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 17:05:58,948 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 17:05:58,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 17:05:58,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 17:05:58,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 17:05:58,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:05:58" (1/1) ... [2021-08-30 17:05:58,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1424253d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:58, skipping insertion in model container [2021-08-30 17:05:58,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:05:58" (1/1) ... [2021-08-30 17:05:58,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 17:05:58,980 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 17:05:59,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 17:05:59,187 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 17:05:59,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 17:05:59,257 INFO L208 MainTranslator]: Completed translation [2021-08-30 17:05:59,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:59 WrapperNode [2021-08-30 17:05:59,258 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 17:05:59,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 17:05:59,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 17:05:59,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 17:05:59,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:59" (1/1) ... [2021-08-30 17:05:59,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:59" (1/1) ... [2021-08-30 17:05:59,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:59" (1/1) ... [2021-08-30 17:05:59,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:59" (1/1) ... [2021-08-30 17:05:59,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:59" (1/1) ... [2021-08-30 17:05:59,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:59" (1/1) ... [2021-08-30 17:05:59,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:59" (1/1) ... [2021-08-30 17:05:59,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 17:05:59,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 17:05:59,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 17:05:59,338 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 17:05:59,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:59" (1/1) ... [2021-08-30 17:05:59,343 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 17:05:59,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:05:59,385 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) [2021-08-30 17:05:59,423 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 [2021-08-30 17:05:59,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 17:05:59,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 17:05:59,434 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-30 17:05:59,434 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-30 17:05:59,434 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-30 17:05:59,434 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-30 17:05:59,434 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-30 17:05:59,435 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-30 17:05:59,435 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-08-30 17:05:59,435 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 17:05:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-30 17:05:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-30 17:05:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-30 17:05:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-30 17:05:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-30 17:05:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 17:05:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-30 17:05:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-30 17:05:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-30 17:05:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-30 17:05:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-30 17:05:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-30 17:05:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-30 17:05:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-30 17:05:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-30 17:05:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-30 17:05:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-30 17:05:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-30 17:05:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-30 17:05:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-30 17:05:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-30 17:05:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-30 17:05:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-30 17:05:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-30 17:05:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-30 17:05:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-30 17:05:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-30 17:05:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-30 17:05:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-30 17:05:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-30 17:05:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-30 17:05:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-30 17:05:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-30 17:05:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-30 17:05:59,440 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-30 17:05:59,440 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-30 17:05:59,440 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-30 17:05:59,440 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-30 17:05:59,440 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-30 17:05:59,440 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-30 17:05:59,441 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-30 17:05:59,441 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-30 17:05:59,441 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-30 17:05:59,441 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-30 17:05:59,441 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-30 17:05:59,442 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-30 17:05:59,442 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-30 17:05:59,442 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-30 17:05:59,442 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-30 17:05:59,442 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-30 17:05:59,442 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-30 17:05:59,442 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-30 17:05:59,443 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-30 17:05:59,443 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-30 17:05:59,443 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-30 17:05:59,443 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-30 17:05:59,443 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-30 17:05:59,443 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-30 17:05:59,444 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-30 17:05:59,444 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-30 17:05:59,444 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-30 17:05:59,445 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-30 17:05:59,445 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-30 17:05:59,445 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-30 17:05:59,445 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-30 17:05:59,445 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-30 17:05:59,445 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-30 17:05:59,445 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-30 17:05:59,445 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-30 17:05:59,446 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-30 17:05:59,446 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-30 17:05:59,446 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-30 17:05:59,446 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-30 17:05:59,446 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-30 17:05:59,446 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-30 17:05:59,447 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-30 17:05:59,447 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-30 17:05:59,447 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-30 17:05:59,447 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-30 17:05:59,447 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-30 17:05:59,447 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-30 17:05:59,447 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-30 17:05:59,447 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-30 17:05:59,448 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-30 17:05:59,448 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-30 17:05:59,448 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-30 17:05:59,448 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-30 17:05:59,448 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-30 17:05:59,448 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-30 17:05:59,448 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-30 17:05:59,448 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-30 17:05:59,448 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-30 17:05:59,449 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-30 17:05:59,449 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-30 17:05:59,449 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-30 17:05:59,449 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-30 17:05:59,449 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-30 17:05:59,449 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-30 17:05:59,449 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-30 17:05:59,449 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-30 17:05:59,450 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-30 17:05:59,450 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-30 17:05:59,450 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-30 17:05:59,450 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-30 17:05:59,451 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-30 17:05:59,451 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-30 17:05:59,451 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-30 17:05:59,451 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-30 17:05:59,451 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-30 17:05:59,451 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-30 17:05:59,451 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-30 17:05:59,451 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-30 17:05:59,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-30 17:05:59,452 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-08-30 17:05:59,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-30 17:05:59,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-30 17:05:59,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-30 17:05:59,452 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 17:05:59,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-08-30 17:05:59,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 17:05:59,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 17:05:59,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-30 17:05:59,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 17:05:59,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-30 17:05:59,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-30 17:05:59,783 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 17:05:59,784 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-30 17:05:59,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:05:59 BoogieIcfgContainer [2021-08-30 17:05:59,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 17:05:59,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 17:05:59,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 17:05:59,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 17:05:59,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:05:58" (1/3) ... [2021-08-30 17:05:59,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30436a6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:05:59, skipping insertion in model container [2021-08-30 17:05:59,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:05:59" (2/3) ... [2021-08-30 17:05:59,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30436a6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:05:59, skipping insertion in model container [2021-08-30 17:05:59,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:05:59" (3/3) ... [2021-08-30 17:05:59,794 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0232-3.i [2021-08-30 17:05:59,798 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 17:05:59,798 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2021-08-30 17:05:59,831 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 17:05:59,839 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 [2021-08-30 17:05:59,839 INFO L340 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2021-08-30 17:05:59,849 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 53 states have (on average 2.150943396226415) internal successors, (114), 107 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:05:59,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-30 17:05:59,854 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:05:59,854 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:05:59,854 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:05:59,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:05:59,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1500158253, now seen corresponding path program 1 times [2021-08-30 17:05:59,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:05:59,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647259329] [2021-08-30 17:05:59,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:05:59,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:05:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:00,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:00,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:00,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647259329] [2021-08-30 17:06:00,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647259329] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:06:00,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:06:00,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 17:06:00,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336065280] [2021-08-30 17:06:00,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-30 17:06:00,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:00,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-30 17:06:00,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-30 17:06:00,073 INFO L87 Difference]: Start difference. First operand has 114 states, 53 states have (on average 2.150943396226415) internal successors, (114), 107 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:06:00,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:00,268 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2021-08-30 17:06:00,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-30 17:06:00,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-08-30 17:06:00,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:00,277 INFO L225 Difference]: With dead ends: 114 [2021-08-30 17:06:00,278 INFO L226 Difference]: Without dead ends: 111 [2021-08-30 17:06:00,279 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.62ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-30 17:06:00,283 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 111.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.27ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 145.60ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:00,284 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 226 Unknown, 0 Unchecked, 2.27ms Time], IncrementalHoareTripleChecker [2 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 145.60ms Time] [2021-08-30 17:06:00,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-30 17:06:00,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-08-30 17:06:00,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 51 states have (on average 2.156862745098039) internal successors, (110), 105 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:06:00,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2021-08-30 17:06:00,308 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 8 [2021-08-30 17:06:00,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:00,308 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2021-08-30 17:06:00,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:06:00,309 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2021-08-30 17:06:00,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-30 17:06:00,309 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:00,309 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:06:00,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-30 17:06:00,309 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting appendErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:00,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:00,310 INFO L82 PathProgramCache]: Analyzing trace with hash -739601476, now seen corresponding path program 1 times [2021-08-30 17:06:00,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:00,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732598496] [2021-08-30 17:06:00,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:00,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:00,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:00,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:00,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732598496] [2021-08-30 17:06:00,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732598496] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:06:00,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:06:00,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 17:06:00,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019779424] [2021-08-30 17:06:00,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:06:00,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:00,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:06:00,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:06:00,383 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:06:00,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:00,645 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2021-08-30 17:06:00,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 17:06:00,646 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-08-30 17:06:00,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:00,649 INFO L225 Difference]: With dead ends: 105 [2021-08-30 17:06:00,649 INFO L226 Difference]: Without dead ends: 105 [2021-08-30 17:06:00,649 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.97ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:06:00,653 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 105 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 170.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.30ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 210.94ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:00,653 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 14 Invalid, 422 Unknown, 0 Unchecked, 6.30ms Time], IncrementalHoareTripleChecker [18 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 210.94ms Time] [2021-08-30 17:06:00,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-08-30 17:06:00,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-08-30 17:06:00,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 52 states have (on average 2.0) internal successors, (104), 98 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:06:00,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2021-08-30 17:06:00,666 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 9 [2021-08-30 17:06:00,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:00,666 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2021-08-30 17:06:00,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:06:00,667 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2021-08-30 17:06:00,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-30 17:06:00,667 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:00,667 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:06:00,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-30 17:06:00,667 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:00,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:00,668 INFO L82 PathProgramCache]: Analyzing trace with hash -739601475, now seen corresponding path program 1 times [2021-08-30 17:06:00,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:00,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834342340] [2021-08-30 17:06:00,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:00,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:00,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:00,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:00,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:00,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834342340] [2021-08-30 17:06:00,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834342340] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:06:00,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:06:00,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 17:06:00,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114445159] [2021-08-30 17:06:00,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:06:00,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:00,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:06:00,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:06:00,781 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:06:01,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:01,051 INFO L93 Difference]: Finished difference Result 133 states and 140 transitions. [2021-08-30 17:06:01,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:06:01,051 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-08-30 17:06:01,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:01,055 INFO L225 Difference]: With dead ends: 133 [2021-08-30 17:06:01,055 INFO L226 Difference]: Without dead ends: 133 [2021-08-30 17:06:01,056 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.63ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:06:01,056 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 90 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 180.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.02ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 229.99ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:01,057 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 14 Invalid, 468 Unknown, 0 Unchecked, 3.02ms Time], IncrementalHoareTripleChecker [13 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 229.99ms Time] [2021-08-30 17:06:01,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-08-30 17:06:01,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-08-30 17:06:01,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 63 states have (on average 1.8571428571428572) internal successors, (117), 105 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:06:01,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2021-08-30 17:06:01,065 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 9 [2021-08-30 17:06:01,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:01,065 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2021-08-30 17:06:01,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:06:01,065 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2021-08-30 17:06:01,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 17:06:01,066 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:01,066 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:06:01,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-30 17:06:01,066 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:01,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:01,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1452809171, now seen corresponding path program 1 times [2021-08-30 17:06:01,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:01,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938609416] [2021-08-30 17:06:01,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:01,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:01,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:01,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:01,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938609416] [2021-08-30 17:06:01,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938609416] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:06:01,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:06:01,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 17:06:01,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908983477] [2021-08-30 17:06:01,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 17:06:01,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:01,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 17:06:01,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:06:01,126 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:06:01,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:01,246 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2021-08-30 17:06:01,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 17:06:01,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-30 17:06:01,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:01,247 INFO L225 Difference]: With dead ends: 107 [2021-08-30 17:06:01,247 INFO L226 Difference]: Without dead ends: 107 [2021-08-30 17:06:01,247 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.15ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:06:01,248 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.29ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 110.29ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:01,248 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 10 Invalid, 269 Unknown, 0 Unchecked, 1.29ms Time], IncrementalHoareTripleChecker [6 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 110.29ms Time] [2021-08-30 17:06:01,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-08-30 17:06:01,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-08-30 17:06:01,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 63 states have (on average 1.7777777777777777) internal successors, (112), 101 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:06:01,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2021-08-30 17:06:01,252 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 10 [2021-08-30 17:06:01,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:01,252 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2021-08-30 17:06:01,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:06:01,253 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2021-08-30 17:06:01,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 17:06:01,253 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:01,253 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:06:01,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-30 17:06:01,253 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:01,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:01,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1452809170, now seen corresponding path program 1 times [2021-08-30 17:06:01,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:01,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607368721] [2021-08-30 17:06:01,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:01,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:01,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:01,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:01,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607368721] [2021-08-30 17:06:01,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607368721] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:06:01,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:06:01,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 17:06:01,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619797621] [2021-08-30 17:06:01,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 17:06:01,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:01,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 17:06:01,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:06:01,290 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:06:01,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:01,408 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2021-08-30 17:06:01,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 17:06:01,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-30 17:06:01,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:01,410 INFO L225 Difference]: With dead ends: 103 [2021-08-30 17:06:01,410 INFO L226 Difference]: Without dead ends: 103 [2021-08-30 17:06:01,411 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.28ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:06:01,415 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 85.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.14ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 113.01ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:01,415 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 10 Invalid, 261 Unknown, 0 Unchecked, 1.14ms Time], IncrementalHoareTripleChecker [6 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 113.01ms Time] [2021-08-30 17:06:01,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-08-30 17:06:01,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-08-30 17:06:01,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.6984126984126984) internal successors, (107), 97 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:06:01,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2021-08-30 17:06:01,427 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 10 [2021-08-30 17:06:01,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:01,428 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2021-08-30 17:06:01,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:06:01,428 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2021-08-30 17:06:01,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-30 17:06:01,428 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:01,428 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:06:01,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-30 17:06:01,428 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:01,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:01,429 INFO L82 PathProgramCache]: Analyzing trace with hash -2099912409, now seen corresponding path program 1 times [2021-08-30 17:06:01,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:01,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002468145] [2021-08-30 17:06:01,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:01,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:01,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:01,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:01,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:01,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002468145] [2021-08-30 17:06:01,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002468145] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:06:01,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:06:01,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-30 17:06:01,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531318655] [2021-08-30 17:06:01,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 17:06:01,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:01,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 17:06:01,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:06:01,545 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:06:01,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:01,917 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2021-08-30 17:06:01,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-30 17:06:01,918 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-08-30 17:06:01,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:01,918 INFO L225 Difference]: With dead ends: 114 [2021-08-30 17:06:01,918 INFO L226 Difference]: Without dead ends: 114 [2021-08-30 17:06:01,919 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 122.89ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-08-30 17:06:01,919 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 238.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.25ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 285.68ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:01,919 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 40 Invalid, 733 Unknown, 0 Unchecked, 3.25ms Time], IncrementalHoareTripleChecker [10 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 285.68ms Time] [2021-08-30 17:06:01,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-08-30 17:06:01,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2021-08-30 17:06:01,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 69 states have (on average 1.6376811594202898) internal successors, (113), 103 states have internal predecessors, (113), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:06:01,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2021-08-30 17:06:01,924 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 15 [2021-08-30 17:06:01,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:01,924 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2021-08-30 17:06:01,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:06:01,924 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2021-08-30 17:06:01,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-30 17:06:01,925 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:01,925 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:06:01,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-30 17:06:01,925 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:01,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:01,925 INFO L82 PathProgramCache]: Analyzing trace with hash -672497070, now seen corresponding path program 1 times [2021-08-30 17:06:01,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:01,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662609327] [2021-08-30 17:06:01,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:01,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:01,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:01,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:01,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:01,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662609327] [2021-08-30 17:06:01,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662609327] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:06:01,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:06:01,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 17:06:01,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121603980] [2021-08-30 17:06:01,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 17:06:01,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:01,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 17:06:01,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:06:02,000 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:06:02,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:02,183 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2021-08-30 17:06:02,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:06:02,183 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-08-30 17:06:02,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:02,184 INFO L225 Difference]: With dead ends: 109 [2021-08-30 17:06:02,184 INFO L226 Difference]: Without dead ends: 109 [2021-08-30 17:06:02,184 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 46.20ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-30 17:06:02,185 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 109 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 118.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.38ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 150.81ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:02,185 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 16 Invalid, 357 Unknown, 0 Unchecked, 5.38ms Time], IncrementalHoareTripleChecker [7 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 150.81ms Time] [2021-08-30 17:06:02,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-30 17:06:02,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2021-08-30 17:06:02,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 66 states have (on average 1.6515151515151516) internal successors, (109), 99 states have internal predecessors, (109), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:06:02,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2021-08-30 17:06:02,188 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 16 [2021-08-30 17:06:02,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:02,188 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2021-08-30 17:06:02,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:06:02,189 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2021-08-30 17:06:02,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-30 17:06:02,189 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:02,189 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:06:02,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-30 17:06:02,190 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:02,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:02,190 INFO L82 PathProgramCache]: Analyzing trace with hash 685617470, now seen corresponding path program 1 times [2021-08-30 17:06:02,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:02,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487565494] [2021-08-30 17:06:02,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:02,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:02,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:02,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:02,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:06:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:02,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:02,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487565494] [2021-08-30 17:06:02,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487565494] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:06:02,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:06:02,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-30 17:06:02,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469681376] [2021-08-30 17:06:02,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 17:06:02,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:02,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 17:06:02,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:06:02,281 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:06:02,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:02,563 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2021-08-30 17:06:02,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 17:06:02,564 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-08-30 17:06:02,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:02,565 INFO L225 Difference]: With dead ends: 123 [2021-08-30 17:06:02,565 INFO L226 Difference]: Without dead ends: 123 [2021-08-30 17:06:02,565 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 75.45ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-30 17:06:02,566 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 65 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 181.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.71ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 229.07ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:02,566 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 21 Invalid, 617 Unknown, 0 Unchecked, 2.71ms Time], IncrementalHoareTripleChecker [8 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 229.07ms Time] [2021-08-30 17:06:02,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-08-30 17:06:02,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 105. [2021-08-30 17:06:02,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 66 states have (on average 1.6363636363636365) internal successors, (108), 98 states have internal predecessors, (108), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:06:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2021-08-30 17:06:02,569 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 24 [2021-08-30 17:06:02,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:02,570 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2021-08-30 17:06:02,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:06:02,570 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2021-08-30 17:06:02,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-30 17:06:02,571 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:02,571 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:06:02,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-30 17:06:02,571 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:02,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:02,572 INFO L82 PathProgramCache]: Analyzing trace with hash 685617471, now seen corresponding path program 1 times [2021-08-30 17:06:02,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:02,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977441398] [2021-08-30 17:06:02,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:02,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:02,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:02,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:02,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:06:02,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:02,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:02,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977441398] [2021-08-30 17:06:02,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977441398] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:06:02,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:06:02,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-30 17:06:02,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631745205] [2021-08-30 17:06:02,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 17:06:02,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:02,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 17:06:02,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:06:02,677 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:06:03,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:03,001 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2021-08-30 17:06:03,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 17:06:03,001 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-08-30 17:06:03,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:03,002 INFO L225 Difference]: With dead ends: 128 [2021-08-30 17:06:03,002 INFO L226 Difference]: Without dead ends: 128 [2021-08-30 17:06:03,002 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 88.83ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-30 17:06:03,003 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 73 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 206.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.79ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 261.86ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:03,003 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 24 Invalid, 675 Unknown, 0 Unchecked, 2.79ms Time], IncrementalHoareTripleChecker [8 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 261.86ms Time] [2021-08-30 17:06:03,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-30 17:06:03,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 104. [2021-08-30 17:06:03,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 66 states have (on average 1.621212121212121) internal successors, (107), 97 states have internal predecessors, (107), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:06:03,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2021-08-30 17:06:03,006 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 24 [2021-08-30 17:06:03,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:03,006 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2021-08-30 17:06:03,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:06:03,006 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2021-08-30 17:06:03,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-30 17:06:03,006 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:03,006 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 17:06:03,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-30 17:06:03,007 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:03,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:03,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1780011878, now seen corresponding path program 1 times [2021-08-30 17:06:03,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:03,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061978187] [2021-08-30 17:06:03,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:03,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:03,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:03,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:06:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:03,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:03,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061978187] [2021-08-30 17:06:03,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061978187] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:06:03,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:06:03,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 17:06:03,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317000570] [2021-08-30 17:06:03,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 17:06:03,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:03,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 17:06:03,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-30 17:06:03,074 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:06:03,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:03,299 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2021-08-30 17:06:03,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 17:06:03,300 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-08-30 17:06:03,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:03,300 INFO L225 Difference]: With dead ends: 99 [2021-08-30 17:06:03,300 INFO L226 Difference]: Without dead ends: 99 [2021-08-30 17:06:03,300 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 57.34ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:06:03,301 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 162.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.65ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 191.71ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:03,301 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 26 Invalid, 530 Unknown, 0 Unchecked, 1.65ms Time], IncrementalHoareTripleChecker [7 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 191.71ms Time] [2021-08-30 17:06:03,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-08-30 17:06:03,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-08-30 17:06:03,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 60 states have (on average 1.6166666666666667) internal successors, (97), 91 states have internal predecessors, (97), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:06:03,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2021-08-30 17:06:03,303 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 26 [2021-08-30 17:06:03,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:03,303 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2021-08-30 17:06:03,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:06:03,304 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2021-08-30 17:06:03,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-30 17:06:03,304 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:03,304 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 17:06:03,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-30 17:06:03,304 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr40ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:03,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:03,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1780011234, now seen corresponding path program 1 times [2021-08-30 17:06:03,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:03,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539468367] [2021-08-30 17:06:03,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:03,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:03,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:03,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:06:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:03,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:03,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539468367] [2021-08-30 17:06:03,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539468367] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:06:03,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:06:03,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-30 17:06:03,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945129856] [2021-08-30 17:06:03,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 17:06:03,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:03,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 17:06:03,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:06:03,367 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:06:03,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:03,609 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-08-30 17:06:03,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 17:06:03,610 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-08-30 17:06:03,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:03,611 INFO L225 Difference]: With dead ends: 96 [2021-08-30 17:06:03,611 INFO L226 Difference]: Without dead ends: 96 [2021-08-30 17:06:03,611 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 63.35ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-30 17:06:03,611 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 35 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 162.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.72ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 197.16ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:03,611 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 22 Invalid, 593 Unknown, 0 Unchecked, 1.72ms Time], IncrementalHoareTripleChecker [7 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 197.16ms Time] [2021-08-30 17:06:03,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-08-30 17:06:03,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-08-30 17:06:03,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 58 states have (on average 1.6206896551724137) internal successors, (94), 89 states have internal predecessors, (94), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:06:03,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2021-08-30 17:06:03,613 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 26 [2021-08-30 17:06:03,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:03,614 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2021-08-30 17:06:03,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:06:03,614 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2021-08-30 17:06:03,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-30 17:06:03,614 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:03,614 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 17:06:03,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-30 17:06:03,614 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:03,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:03,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1634399054, now seen corresponding path program 1 times [2021-08-30 17:06:03,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:03,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816003555] [2021-08-30 17:06:03,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:03,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:03,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:03,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:06:03,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:03,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:03,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816003555] [2021-08-30 17:06:03,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816003555] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:06:03,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:06:03,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-30 17:06:03,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34409782] [2021-08-30 17:06:03,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 17:06:03,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:03,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 17:06:03,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:06:03,716 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:06:03,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:03,997 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2021-08-30 17:06:03,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 17:06:03,998 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-08-30 17:06:03,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:03,998 INFO L225 Difference]: With dead ends: 95 [2021-08-30 17:06:03,998 INFO L226 Difference]: Without dead ends: 95 [2021-08-30 17:06:03,998 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 86.23ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-30 17:06:03,999 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 51 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 190.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.96ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 226.90ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:03,999 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 21 Invalid, 582 Unknown, 0 Unchecked, 1.96ms Time], IncrementalHoareTripleChecker [8 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 226.90ms Time] [2021-08-30 17:06:03,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-08-30 17:06:04,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-08-30 17:06:04,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 58 states have (on average 1.603448275862069) internal successors, (93), 88 states have internal predecessors, (93), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:06:04,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 100 transitions. [2021-08-30 17:06:04,001 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 100 transitions. Word has length 27 [2021-08-30 17:06:04,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:04,001 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 100 transitions. [2021-08-30 17:06:04,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:06:04,001 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 100 transitions. [2021-08-30 17:06:04,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-30 17:06:04,002 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:04,002 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 17:06:04,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-30 17:06:04,002 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:04,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:04,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1634399055, now seen corresponding path program 1 times [2021-08-30 17:06:04,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:04,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028571317] [2021-08-30 17:06:04,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:04,003 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:04,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:04,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:04,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:06:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:04,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:04,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028571317] [2021-08-30 17:06:04,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028571317] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:06:04,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:06:04,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 17:06:04,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869300577] [2021-08-30 17:06:04,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 17:06:04,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:04,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 17:06:04,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-30 17:06:04,069 INFO L87 Difference]: Start difference. First operand 95 states and 100 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:06:04,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:04,264 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2021-08-30 17:06:04,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:06:04,265 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-08-30 17:06:04,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:04,265 INFO L225 Difference]: With dead ends: 94 [2021-08-30 17:06:04,265 INFO L226 Difference]: Without dead ends: 94 [2021-08-30 17:06:04,265 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 51.87ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-30 17:06:04,266 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 133.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.40ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 163.74ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:04,266 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 490 Unknown, 0 Unchecked, 1.40ms Time], IncrementalHoareTripleChecker [4 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 163.74ms Time] [2021-08-30 17:06:04,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-30 17:06:04,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-08-30 17:06:04,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.5862068965517242) internal successors, (92), 87 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:06:04,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2021-08-30 17:06:04,268 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 27 [2021-08-30 17:06:04,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:04,268 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2021-08-30 17:06:04,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:06:04,268 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2021-08-30 17:06:04,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-30 17:06:04,269 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:04,269 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 17:06:04,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-30 17:06:04,269 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr10ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:04,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:04,269 INFO L82 PathProgramCache]: Analyzing trace with hash 873236865, now seen corresponding path program 1 times [2021-08-30 17:06:04,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:04,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539231215] [2021-08-30 17:06:04,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:04,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:04,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:04,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:06:04,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:04,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:04,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539231215] [2021-08-30 17:06:04,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539231215] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:06:04,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:06:04,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-08-30 17:06:04,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406449144] [2021-08-30 17:06:04,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-30 17:06:04,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:04,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-30 17:06:04,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-08-30 17:06:04,477 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:06:05,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:05,153 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2021-08-30 17:06:05,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-30 17:06:05,153 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-08-30 17:06:05,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:05,155 INFO L225 Difference]: With dead ends: 142 [2021-08-30 17:06:05,155 INFO L226 Difference]: Without dead ends: 142 [2021-08-30 17:06:05,156 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 331.90ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-08-30 17:06:05,156 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 124 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 353.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.71ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 432.20ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:05,157 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 31 Invalid, 1051 Unknown, 0 Unchecked, 3.71ms Time], IncrementalHoareTripleChecker [26 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 432.20ms Time] [2021-08-30 17:06:05,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-30 17:06:05,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 109. [2021-08-30 17:06:05,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 72 states have (on average 1.4861111111111112) internal successors, (107), 101 states have internal predecessors, (107), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-30 17:06:05,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2021-08-30 17:06:05,160 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 28 [2021-08-30 17:06:05,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:05,161 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2021-08-30 17:06:05,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:06:05,161 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2021-08-30 17:06:05,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-30 17:06:05,162 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:05,162 INFO L513 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] [2021-08-30 17:06:05,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-30 17:06:05,162 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:05,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:05,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1313641447, now seen corresponding path program 1 times [2021-08-30 17:06:05,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:05,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805520570] [2021-08-30 17:06:05,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:05,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:05,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:05,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:05,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:06:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:05,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:05,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805520570] [2021-08-30 17:06:05,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805520570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:06:05,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798347285] [2021-08-30 17:06:05,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:05,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:06:05,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:06:05,305 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) [2021-08-30 17:06:05,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-30 17:06:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:05,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-30 17:06:05,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:06:05,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-30 17:06:05,609 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-08-30 17:06:05,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-08-30 17:06:05,725 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-30 17:06:05,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-08-30 17:06:05,826 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-30 17:06:05,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2021-08-30 17:06:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:05,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:06:06,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2021-08-30 17:06:06,304 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-30 17:06:06,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:06:06,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-30 17:06:06,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466037352] [2021-08-30 17:06:06,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-30 17:06:06,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:06,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-30 17:06:06,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-08-30 17:06:06,306 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:06:06,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:06,793 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-08-30 17:06:06,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-30 17:06:06,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2021-08-30 17:06:06,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:06,794 INFO L225 Difference]: With dead ends: 113 [2021-08-30 17:06:06,794 INFO L226 Difference]: Without dead ends: 113 [2021-08-30 17:06:06,794 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 537.99ms TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-08-30 17:06:06,795 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 59 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 253.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.04ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 304.88ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:06,795 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 33 Invalid, 899 Unknown, 0 Unchecked, 3.04ms Time], IncrementalHoareTripleChecker [17 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 304.88ms Time] [2021-08-30 17:06:06,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-08-30 17:06:06,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 108. [2021-08-30 17:06:06,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 72 states have (on average 1.4722222222222223) internal successors, (106), 100 states have internal predecessors, (106), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:06:06,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2021-08-30 17:06:06,797 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 29 [2021-08-30 17:06:06,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:06,798 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2021-08-30 17:06:06,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:06:06,798 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2021-08-30 17:06:06,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-30 17:06:06,798 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:06,798 INFO L513 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] [2021-08-30 17:06:06,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-30 17:06:07,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-30 17:06:07,011 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting appendErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:07,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:07,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1313641446, now seen corresponding path program 1 times [2021-08-30 17:06:07,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:07,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677480229] [2021-08-30 17:06:07,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:07,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:07,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:07,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:06:07,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:07,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:07,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677480229] [2021-08-30 17:06:07,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677480229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:06:07,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36217832] [2021-08-30 17:06:07,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:07,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:06:07,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:06:07,160 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) [2021-08-30 17:06:07,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-30 17:06:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:07,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-30 17:06:07,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:06:07,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 17:06:07,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-08-30 17:06:07,472 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-08-30 17:06:07,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-08-30 17:06:07,488 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-30 17:06:07,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-08-30 17:06:07,589 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-30 17:06:07,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 46 [2021-08-30 17:06:07,598 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-30 17:06:07,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 46 [2021-08-30 17:06:07,695 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-30 17:06:07,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 46 [2021-08-30 17:06:07,699 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-30 17:06:07,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-08-30 17:06:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:07,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:06:08,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 87 [2021-08-30 17:06:08,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 130 [2021-08-30 17:06:08,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2021-08-30 17:06:08,189 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-30 17:06:08,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 47 [2021-08-30 17:06:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:08,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36217832] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:06:08,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:06:08,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 28 [2021-08-30 17:06:08,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507195066] [2021-08-30 17:06:08,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-30 17:06:08,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:08,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-30 17:06:08,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-08-30 17:06:08,287 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand has 29 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 5 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-30 17:06:09,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:09,187 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2021-08-30 17:06:09,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-30 17:06:09,188 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 5 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-08-30 17:06:09,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:09,189 INFO L225 Difference]: With dead ends: 109 [2021-08-30 17:06:09,189 INFO L226 Difference]: Without dead ends: 109 [2021-08-30 17:06:09,189 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 809.14ms TimeCoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2021-08-30 17:06:09,190 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 124 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 379.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.67ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 397 IncrementalHoareTripleChecker+Unchecked, 463.27ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:09,190 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 80 Invalid, 1588 Unknown, 0 Unchecked, 4.67ms Time], IncrementalHoareTripleChecker [15 Valid, 1176 Invalid, 0 Unknown, 397 Unchecked, 463.27ms Time] [2021-08-30 17:06:09,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-30 17:06:09,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2021-08-30 17:06:09,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.4583333333333333) internal successors, (105), 99 states have internal predecessors, (105), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:06:09,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2021-08-30 17:06:09,195 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 29 [2021-08-30 17:06:09,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:09,195 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2021-08-30 17:06:09,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 5 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-30 17:06:09,196 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2021-08-30 17:06:09,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-30 17:06:09,196 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:09,196 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 17:06:09,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-30 17:06:09,412 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,SelfDestructingSolverStorable15 [2021-08-30 17:06:09,412 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr11ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:09,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:09,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1300539121, now seen corresponding path program 1 times [2021-08-30 17:06:09,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:09,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414405515] [2021-08-30 17:06:09,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:09,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:09,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:09,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:09,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:06:09,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:09,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:09,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:09,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414405515] [2021-08-30 17:06:09,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414405515] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:06:09,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:06:09,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-08-30 17:06:09,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747462000] [2021-08-30 17:06:09,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-30 17:06:09,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:09,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-30 17:06:09,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-08-30 17:06:09,597 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:06:10,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:10,278 INFO L93 Difference]: Finished difference Result 142 states and 149 transitions. [2021-08-30 17:06:10,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-30 17:06:10,279 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-08-30 17:06:10,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:10,280 INFO L225 Difference]: With dead ends: 142 [2021-08-30 17:06:10,280 INFO L226 Difference]: Without dead ends: 142 [2021-08-30 17:06:10,280 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 377.49ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-08-30 17:06:10,281 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 111 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 304.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.03ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 380.76ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:10,281 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 26 Invalid, 939 Unknown, 0 Unchecked, 3.03ms Time], IncrementalHoareTripleChecker [26 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 380.76ms Time] [2021-08-30 17:06:10,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-30 17:06:10,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2021-08-30 17:06:10,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 73 states have (on average 1.452054794520548) internal successors, (106), 100 states have internal predecessors, (106), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:06:10,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2021-08-30 17:06:10,284 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 29 [2021-08-30 17:06:10,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:10,284 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2021-08-30 17:06:10,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:06:10,284 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2021-08-30 17:06:10,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-30 17:06:10,285 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:10,285 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 17:06:10,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-30 17:06:10,285 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr12ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:10,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:10,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1662007171, now seen corresponding path program 1 times [2021-08-30 17:06:10,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:10,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801822587] [2021-08-30 17:06:10,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:10,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:10,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:10,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:10,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:06:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:10,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:10,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801822587] [2021-08-30 17:06:10,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801822587] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:06:10,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:06:10,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-08-30 17:06:10,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213550013] [2021-08-30 17:06:10,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-30 17:06:10,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:10,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-30 17:06:10,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-08-30 17:06:10,453 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:06:10,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:10,938 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2021-08-30 17:06:10,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-30 17:06:10,938 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-08-30 17:06:10,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:10,939 INFO L225 Difference]: With dead ends: 119 [2021-08-30 17:06:10,939 INFO L226 Difference]: Without dead ends: 119 [2021-08-30 17:06:10,939 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 198.04ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-08-30 17:06:10,939 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 77 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 288.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.31ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 360.18ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:10,940 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 22 Invalid, 874 Unknown, 0 Unchecked, 2.31ms Time], IncrementalHoareTripleChecker [17 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 360.18ms Time] [2021-08-30 17:06:10,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-08-30 17:06:10,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2021-08-30 17:06:10,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 74 states have (on average 1.445945945945946) internal successors, (107), 101 states have internal predecessors, (107), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:06:10,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2021-08-30 17:06:10,945 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 30 [2021-08-30 17:06:10,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:10,946 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2021-08-30 17:06:10,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:06:10,946 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2021-08-30 17:06:10,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-30 17:06:10,947 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:10,947 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 17:06:10,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-30 17:06:10,948 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:10,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:10,948 INFO L82 PathProgramCache]: Analyzing trace with hash -17385164, now seen corresponding path program 1 times [2021-08-30 17:06:10,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:10,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689901649] [2021-08-30 17:06:10,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:10,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:10,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:11,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:11,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:06:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:11,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:11,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689901649] [2021-08-30 17:06:11,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689901649] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:06:11,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:06:11,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-30 17:06:11,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691204640] [2021-08-30 17:06:11,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-30 17:06:11,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:11,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-30 17:06:11,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-30 17:06:11,050 INFO L87 Difference]: Start difference. First operand 109 states and 114 transitions. Second operand has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:06:11,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:11,280 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2021-08-30 17:06:11,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 17:06:11,281 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2021-08-30 17:06:11,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:11,281 INFO L225 Difference]: With dead ends: 109 [2021-08-30 17:06:11,281 INFO L226 Difference]: Without dead ends: 109 [2021-08-30 17:06:11,281 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 84.50ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-30 17:06:11,282 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 133 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 150.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.32ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 184.71ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:11,282 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 21 Invalid, 534 Unknown, 0 Unchecked, 1.32ms Time], IncrementalHoareTripleChecker [22 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 184.71ms Time] [2021-08-30 17:06:11,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-30 17:06:11,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2021-08-30 17:06:11,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 74 states have (on average 1.4324324324324325) internal successors, (106), 100 states have internal predecessors, (106), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:06:11,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2021-08-30 17:06:11,284 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 31 [2021-08-30 17:06:11,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:11,284 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2021-08-30 17:06:11,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:06:11,285 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2021-08-30 17:06:11,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-30 17:06:11,285 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:11,285 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 17:06:11,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-30 17:06:11,285 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:11,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:11,286 INFO L82 PathProgramCache]: Analyzing trace with hash -17385163, now seen corresponding path program 1 times [2021-08-30 17:06:11,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:11,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503049985] [2021-08-30 17:06:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:11,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:11,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:11,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:06:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:11,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:11,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503049985] [2021-08-30 17:06:11,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503049985] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:06:11,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:06:11,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 17:06:11,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978527153] [2021-08-30 17:06:11,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:06:11,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:11,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:06:11,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:06:11,333 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:06:11,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:11,452 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2021-08-30 17:06:11,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 17:06:11,453 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2021-08-30 17:06:11,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:11,453 INFO L225 Difference]: With dead ends: 101 [2021-08-30 17:06:11,453 INFO L226 Difference]: Without dead ends: 101 [2021-08-30 17:06:11,454 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 28.49ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-30 17:06:11,454 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 95 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 85.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.86ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 104.25ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:11,454 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 16 Invalid, 257 Unknown, 0 Unchecked, 0.86ms Time], IncrementalHoareTripleChecker [12 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 104.25ms Time] [2021-08-30 17:06:11,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-08-30 17:06:11,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-08-30 17:06:11,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 74 states have (on average 1.3243243243243243) internal successors, (98), 93 states have internal predecessors, (98), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:06:11,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2021-08-30 17:06:11,456 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 31 [2021-08-30 17:06:11,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:11,456 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2021-08-30 17:06:11,456 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:06:11,457 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2021-08-30 17:06:11,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-30 17:06:11,457 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:11,457 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 17:06:11,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-30 17:06:11,457 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr15ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:11,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:11,457 INFO L82 PathProgramCache]: Analyzing trace with hash -538940057, now seen corresponding path program 1 times [2021-08-30 17:06:11,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:11,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370665641] [2021-08-30 17:06:11,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:11,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:11,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:11,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:06:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:11,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:11,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370665641] [2021-08-30 17:06:11,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370665641] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:06:11,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:06:11,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 17:06:11,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010782447] [2021-08-30 17:06:11,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 17:06:11,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:11,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 17:06:11,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:06:11,537 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:06:11,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:11,752 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2021-08-30 17:06:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 17:06:11,753 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-08-30 17:06:11,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:11,754 INFO L225 Difference]: With dead ends: 100 [2021-08-30 17:06:11,754 INFO L226 Difference]: Without dead ends: 100 [2021-08-30 17:06:11,754 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 62.13ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-30 17:06:11,754 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 142.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.85ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 172.74ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:11,754 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 19 Invalid, 479 Unknown, 0 Unchecked, 1.85ms Time], IncrementalHoareTripleChecker [7 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 172.74ms Time] [2021-08-30 17:06:11,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-30 17:06:11,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-08-30 17:06:11,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 92 states have internal predecessors, (97), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:06:11,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2021-08-30 17:06:11,757 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 32 [2021-08-30 17:06:11,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:11,757 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2021-08-30 17:06:11,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:06:11,757 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2021-08-30 17:06:11,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-30 17:06:11,757 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:11,757 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 17:06:11,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-30 17:06:11,757 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr16ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:11,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:11,758 INFO L82 PathProgramCache]: Analyzing trace with hash 472727508, now seen corresponding path program 1 times [2021-08-30 17:06:11,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:11,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883635573] [2021-08-30 17:06:11,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:11,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:11,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:11,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:06:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:11,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:11,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883635573] [2021-08-30 17:06:11,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883635573] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:06:11,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:06:11,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 17:06:11,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576465086] [2021-08-30 17:06:11,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 17:06:11,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:11,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 17:06:11,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:06:11,835 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:06:12,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:12,077 INFO L93 Difference]: Finished difference Result 99 states and 103 transitions. [2021-08-30 17:06:12,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 17:06:12,077 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2021-08-30 17:06:12,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:12,078 INFO L225 Difference]: With dead ends: 99 [2021-08-30 17:06:12,078 INFO L226 Difference]: Without dead ends: 99 [2021-08-30 17:06:12,078 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 78.12ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-30 17:06:12,079 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 146.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.42ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 191.75ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:12,079 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 21 Invalid, 502 Unknown, 0 Unchecked, 1.42ms Time], IncrementalHoareTripleChecker [7 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 191.75ms Time] [2021-08-30 17:06:12,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-08-30 17:06:12,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-08-30 17:06:12,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 74 states have (on average 1.2972972972972974) internal successors, (96), 91 states have internal predecessors, (96), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:06:12,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2021-08-30 17:06:12,081 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 33 [2021-08-30 17:06:12,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:12,081 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2021-08-30 17:06:12,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:06:12,082 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2021-08-30 17:06:12,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-30 17:06:12,082 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:12,082 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 17:06:12,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-30 17:06:12,082 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr17ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:12,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:12,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1769650953, now seen corresponding path program 1 times [2021-08-30 17:06:12,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:12,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998444891] [2021-08-30 17:06:12,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:12,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:12,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:12,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:06:12,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:12,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:12,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998444891] [2021-08-30 17:06:12,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998444891] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:06:12,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:06:12,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-08-30 17:06:12,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154615850] [2021-08-30 17:06:12,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-30 17:06:12,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:12,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-30 17:06:12,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-30 17:06:12,298 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:06:12,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:12,634 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2021-08-30 17:06:12,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-30 17:06:12,634 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2021-08-30 17:06:12,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:12,635 INFO L225 Difference]: With dead ends: 124 [2021-08-30 17:06:12,635 INFO L226 Difference]: Without dead ends: 124 [2021-08-30 17:06:12,635 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 207.09ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-08-30 17:06:12,636 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 54 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 190.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.42ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 234.09ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:12,636 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 24 Invalid, 661 Unknown, 0 Unchecked, 2.42ms Time], IncrementalHoareTripleChecker [10 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 234.09ms Time] [2021-08-30 17:06:12,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-08-30 17:06:12,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2021-08-30 17:06:12,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.2765957446808511) internal successors, (120), 111 states have internal predecessors, (120), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-30 17:06:12,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2021-08-30 17:06:12,639 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 34 [2021-08-30 17:06:12,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:12,640 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2021-08-30 17:06:12,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:06:12,640 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2021-08-30 17:06:12,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-30 17:06:12,640 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:12,640 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 17:06:12,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-08-30 17:06:12,641 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:12,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:12,641 INFO L82 PathProgramCache]: Analyzing trace with hash -975395209, now seen corresponding path program 1 times [2021-08-30 17:06:12,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:12,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513277366] [2021-08-30 17:06:12,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:12,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:12,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:12,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:12,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:12,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:06:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:12,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:12,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513277366] [2021-08-30 17:06:12,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513277366] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:06:12,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:06:12,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-30 17:06:12,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115347607] [2021-08-30 17:06:12,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 17:06:12,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:12,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 17:06:12,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:06:12,732 INFO L87 Difference]: Start difference. First operand 120 states and 128 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:06:12,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:12,949 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2021-08-30 17:06:12,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-30 17:06:12,949 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2021-08-30 17:06:12,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:12,950 INFO L225 Difference]: With dead ends: 126 [2021-08-30 17:06:12,950 INFO L226 Difference]: Without dead ends: 126 [2021-08-30 17:06:12,950 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 67.37ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-30 17:06:12,950 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 59 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 149.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.27ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 182.68ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:12,950 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 14 Invalid, 534 Unknown, 0 Unchecked, 1.27ms Time], IncrementalHoareTripleChecker [19 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 182.68ms Time] [2021-08-30 17:06:12,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-08-30 17:06:12,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-08-30 17:06:12,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 99 states have (on average 1.2626262626262625) internal successors, (125), 116 states have internal predecessors, (125), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-30 17:06:12,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 133 transitions. [2021-08-30 17:06:12,953 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 133 transitions. Word has length 35 [2021-08-30 17:06:12,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:12,953 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 133 transitions. [2021-08-30 17:06:12,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:06:12,954 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 133 transitions. [2021-08-30 17:06:12,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-30 17:06:12,954 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:12,954 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-08-30 17:06:12,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-08-30 17:06:12,954 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:12,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:12,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1581588223, now seen corresponding path program 1 times [2021-08-30 17:06:12,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:12,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154812329] [2021-08-30 17:06:12,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:12,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:13,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:13,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:06:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:13,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:13,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154812329] [2021-08-30 17:06:13,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154812329] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:06:13,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:06:13,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-08-30 17:06:13,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083045943] [2021-08-30 17:06:13,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-30 17:06:13,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:13,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-30 17:06:13,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-08-30 17:06:13,225 INFO L87 Difference]: Start difference. First operand 125 states and 133 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:06:13,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:13,865 INFO L93 Difference]: Finished difference Result 137 states and 144 transitions. [2021-08-30 17:06:13,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-30 17:06:13,865 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2021-08-30 17:06:13,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:13,866 INFO L225 Difference]: With dead ends: 137 [2021-08-30 17:06:13,866 INFO L226 Difference]: Without dead ends: 137 [2021-08-30 17:06:13,866 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 351.42ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-08-30 17:06:13,870 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 40 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 342.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.72ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 415.07ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:13,870 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 49 Invalid, 1183 Unknown, 0 Unchecked, 2.72ms Time], IncrementalHoareTripleChecker [25 Valid, 1158 Invalid, 0 Unknown, 0 Unchecked, 415.07ms Time] [2021-08-30 17:06:13,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-30 17:06:13,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 128. [2021-08-30 17:06:13,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 102 states have (on average 1.2647058823529411) internal successors, (129), 119 states have internal predecessors, (129), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-30 17:06:13,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2021-08-30 17:06:13,878 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 39 [2021-08-30 17:06:13,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:13,879 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2021-08-30 17:06:13,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:06:13,879 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2021-08-30 17:06:13,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-30 17:06:13,880 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:13,880 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-08-30 17:06:13,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-08-30 17:06:13,881 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr40ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:13,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:13,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1581588867, now seen corresponding path program 1 times [2021-08-30 17:06:13,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:13,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819539079] [2021-08-30 17:06:13,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:13,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:14,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:14,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:14,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:06:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:14,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:14,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:14,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819539079] [2021-08-30 17:06:14,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819539079] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:06:14,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:06:14,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-08-30 17:06:14,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36371236] [2021-08-30 17:06:14,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-30 17:06:14,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:14,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-30 17:06:14,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-08-30 17:06:14,332 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:06:15,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:15,053 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2021-08-30 17:06:15,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-30 17:06:15,053 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2021-08-30 17:06:15,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:15,054 INFO L225 Difference]: With dead ends: 133 [2021-08-30 17:06:15,054 INFO L226 Difference]: Without dead ends: 114 [2021-08-30 17:06:15,054 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 412.35ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-08-30 17:06:15,055 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 40 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 427.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.79ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 507.27ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:15,055 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 19 Invalid, 1246 Unknown, 0 Unchecked, 2.79ms Time], IncrementalHoareTripleChecker [15 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 507.27ms Time] [2021-08-30 17:06:15,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-08-30 17:06:15,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-08-30 17:06:15,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 104 states have internal predecessors, (113), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-30 17:06:15,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2021-08-30 17:06:15,057 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 39 [2021-08-30 17:06:15,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:15,057 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2021-08-30 17:06:15,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:06:15,057 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2021-08-30 17:06:15,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-30 17:06:15,058 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:15,058 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 17:06:15,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-08-30 17:06:15,058 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr10ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:15,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:15,058 INFO L82 PathProgramCache]: Analyzing trace with hash -425207857, now seen corresponding path program 1 times [2021-08-30 17:06:15,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:15,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561920983] [2021-08-30 17:06:15,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:15,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:15,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:15,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:15,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:15,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:06:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:15,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-30 17:06:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:15,218 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:06:15,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:15,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561920983] [2021-08-30 17:06:15,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561920983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:06:15,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414225191] [2021-08-30 17:06:15,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:15,219 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:06:15,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:06:15,220 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) [2021-08-30 17:06:15,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-30 17:06:15,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:15,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-30 17:06:15,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:06:15,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-30 17:06:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:15,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:06:15,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-08-30 17:06:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:15,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414225191] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:06:15,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:06:15,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 24 [2021-08-30 17:06:15,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205634780] [2021-08-30 17:06:15,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-30 17:06:15,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:15,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-30 17:06:15,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-08-30 17:06:15,778 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 20 states have internal predecessors, (55), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-30 17:06:16,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:16,418 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2021-08-30 17:06:16,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-30 17:06:16,418 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 20 states have internal predecessors, (55), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 42 [2021-08-30 17:06:16,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:16,419 INFO L225 Difference]: With dead ends: 89 [2021-08-30 17:06:16,419 INFO L226 Difference]: Without dead ends: 89 [2021-08-30 17:06:16,419 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 541.82ms TimeCoverageRelationStatistics Valid=301, Invalid=1591, Unknown=0, NotChecked=0, Total=1892 [2021-08-30 17:06:16,419 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 143 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 256.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.65ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 309.07ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:16,420 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 21 Invalid, 927 Unknown, 0 Unchecked, 3.65ms Time], IncrementalHoareTripleChecker [48 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 309.07ms Time] [2021-08-30 17:06:16,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-30 17:06:16,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-08-30 17:06:16,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 64 states have (on average 1.3125) internal successors, (84), 81 states have internal predecessors, (84), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:06:16,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2021-08-30 17:06:16,422 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 42 [2021-08-30 17:06:16,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:16,422 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2021-08-30 17:06:16,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 20 states have internal predecessors, (55), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-30 17:06:16,422 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2021-08-30 17:06:16,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-30 17:06:16,422 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:16,422 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 17:06:16,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-30 17:06:16,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:06:16,623 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr10ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:16,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:16,624 INFO L82 PathProgramCache]: Analyzing trace with hash -44963474, now seen corresponding path program 1 times [2021-08-30 17:06:16,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:16,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524426043] [2021-08-30 17:06:16,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:16,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:16,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:16,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:06:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:16,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-30 17:06:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:06:17,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:17,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524426043] [2021-08-30 17:06:17,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524426043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:06:17,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247481453] [2021-08-30 17:06:17,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:17,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:06:17,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:06:17,150 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) [2021-08-30 17:06:17,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-30 17:06:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:17,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-30 17:06:17,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:06:17,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 17:06:17,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-30 17:06:17,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-08-30 17:06:17,471 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-08-30 17:06:17,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2021-08-30 17:06:17,536 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-30 17:06:17,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-08-30 17:06:17,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 106 [2021-08-30 17:06:18,068 INFO L354 Elim1Store]: treesize reduction 489, result has 8.9 percent of original size [2021-08-30 17:06:18,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 246 treesize of output 170 [2021-08-30 17:06:18,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 182 [2021-08-30 17:06:18,086 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-08-30 17:06:18,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 188 [2021-08-30 17:06:18,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 57 [2021-08-30 17:06:18,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 61 [2021-08-30 17:06:18,422 INFO L354 Elim1Store]: treesize reduction 82, result has 3.5 percent of original size [2021-08-30 17:06:18,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 41 [2021-08-30 17:06:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:18,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:06:18,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247481453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:06:18,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 17:06:18,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 37 [2021-08-30 17:06:18,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386423442] [2021-08-30 17:06:18,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-30 17:06:18,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:18,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-30 17:06:18,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1498, Unknown=0, NotChecked=0, Total=1640 [2021-08-30 17:06:18,993 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 38 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:06:20,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:20,872 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2021-08-30 17:06:20,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-30 17:06:20,873 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 45 [2021-08-30 17:06:20,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:20,873 INFO L225 Difference]: With dead ends: 112 [2021-08-30 17:06:20,873 INFO L226 Difference]: Without dead ends: 112 [2021-08-30 17:06:20,874 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 2137.99ms TimeCoverageRelationStatistics Valid=366, Invalid=3540, Unknown=0, NotChecked=0, Total=3906 [2021-08-30 17:06:20,874 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 85 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 1938 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 751.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.08ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 898.00ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:20,874 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 31 Invalid, 2074 Unknown, 0 Unchecked, 7.08ms Time], IncrementalHoareTripleChecker [48 Valid, 1938 Invalid, 0 Unknown, 88 Unchecked, 898.00ms Time] [2021-08-30 17:06:20,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-08-30 17:06:20,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 100. [2021-08-30 17:06:20,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.2837837837837838) internal successors, (95), 91 states have internal predecessors, (95), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 17:06:20,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2021-08-30 17:06:20,876 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 45 [2021-08-30 17:06:20,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:20,877 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2021-08-30 17:06:20,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:06:20,877 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2021-08-30 17:06:20,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-30 17:06:20,877 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:20,877 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 17:06:20,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-30 17:06:21,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-30 17:06:21,078 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr11ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:21,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:21,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1393867612, now seen corresponding path program 1 times [2021-08-30 17:06:21,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:21,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086751668] [2021-08-30 17:06:21,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:21,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:21,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:21,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:21,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:06:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:21,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-30 17:06:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:06:21,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:21,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086751668] [2021-08-30 17:06:21,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086751668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:06:21,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228130815] [2021-08-30 17:06:21,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:21,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:06:21,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:06:21,875 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) [2021-08-30 17:06:21,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-30 17:06:21,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:21,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-30 17:06:21,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:06:22,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-30 17:06:22,200 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-08-30 17:06:22,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2021-08-30 17:06:22,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 17:06:22,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 17:06:22,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2021-08-30 17:06:22,361 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-30 17:06:22,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 20 [2021-08-30 17:06:22,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 17:06:28,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 17:06:28,489 INFO L354 Elim1Store]: treesize reduction 231, result has 9.4 percent of original size [2021-08-30 17:06:28,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 105 [2021-08-30 17:06:28,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 149 [2021-08-30 17:06:28,502 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-08-30 17:06:28,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 75 [2021-08-30 17:06:28,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 82 [2021-08-30 17:06:28,746 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-08-30 17:06:28,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 30 [2021-08-30 17:06:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:06:28,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:06:29,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228130815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:06:29,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 17:06:29,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-08-30 17:06:29,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291818726] [2021-08-30 17:06:29,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-30 17:06:29,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:06:29,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-30 17:06:29,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1602, Unknown=9, NotChecked=0, Total=1722 [2021-08-30 17:06:29,035 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 39 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:06:56,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:06:56,689 INFO L93 Difference]: Finished difference Result 99 states and 103 transitions. [2021-08-30 17:06:56,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-30 17:06:56,689 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 46 [2021-08-30 17:06:56,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:06:56,690 INFO L225 Difference]: With dead ends: 99 [2021-08-30 17:06:56,690 INFO L226 Difference]: Without dead ends: 99 [2021-08-30 17:06:56,690 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 33175.98ms TimeCoverageRelationStatistics Valid=355, Invalid=3780, Unknown=25, NotChecked=0, Total=4160 [2021-08-30 17:06:56,691 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 73 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 2293 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 933.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 2602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.70ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 1080.41ms IncrementalHoareTripleChecker+Time [2021-08-30 17:06:56,691 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 63 Invalid, 2602 Unknown, 0 Unchecked, 11.70ms Time], IncrementalHoareTripleChecker [38 Valid, 2293 Invalid, 0 Unknown, 271 Unchecked, 1080.41ms Time] [2021-08-30 17:06:56,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-08-30 17:06:56,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-08-30 17:06:56,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 90 states have internal predecessors, (94), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 17:06:56,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2021-08-30 17:06:56,693 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 46 [2021-08-30 17:06:56,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:06:56,693 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2021-08-30 17:06:56,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:06:56,694 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2021-08-30 17:06:56,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-30 17:06:56,694 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:06:56,694 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-08-30 17:06:56,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-30 17:06:56,894 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,SelfDestructingSolverStorable28 [2021-08-30 17:06:56,895 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr12ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:06:56,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:06:56,895 INFO L82 PathProgramCache]: Analyzing trace with hash -260222928, now seen corresponding path program 1 times [2021-08-30 17:06:56,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:06:56,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700981863] [2021-08-30 17:06:56,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:56,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:06:56,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:57,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:06:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:57,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:06:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:57,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-30 17:06:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:57,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:06:57,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:06:57,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700981863] [2021-08-30 17:06:57,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700981863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:06:57,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759710762] [2021-08-30 17:06:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:06:57,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:06:57,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:06:57,576 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) [2021-08-30 17:06:57,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-30 17:06:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:06:57,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 80 conjunts are in the unsatisfiable core [2021-08-30 17:06:57,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:06:57,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 17:06:57,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 17:06:57,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-30 17:06:57,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 17:06:57,903 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-08-30 17:06:57,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 38 [2021-08-30 17:06:57,999 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-30 17:06:58,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-08-30 17:06:58,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 17:07:00,718 INFO L354 Elim1Store]: treesize reduction 429, result has 10.1 percent of original size [2021-08-30 17:07:00,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 210 treesize of output 152 [2021-08-30 17:07:00,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 251 treesize of output 227 [2021-08-30 17:07:00,738 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-30 17:07:00,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 166 treesize of output 85 [2021-08-30 17:07:00,770 INFO L354 Elim1Store]: treesize reduction 210, result has 25.5 percent of original size [2021-08-30 17:07:00,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 90 treesize of output 128 [2021-08-30 17:07:01,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 129 [2021-08-30 17:07:01,124 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-08-30 17:07:01,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 127 treesize of output 49 [2021-08-30 17:07:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:07:01,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:07:02,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759710762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:07:02,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 17:07:02,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 42 [2021-08-30 17:07:02,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002474838] [2021-08-30 17:07:02,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-30 17:07:02,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:07:02,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-30 17:07:02,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2060, Unknown=1, NotChecked=0, Total=2256 [2021-08-30 17:07:02,524 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand has 43 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:07:04,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:07:04,100 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2021-08-30 17:07:04,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-30 17:07:04,101 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 47 [2021-08-30 17:07:04,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:07:04,101 INFO L225 Difference]: With dead ends: 98 [2021-08-30 17:07:04,101 INFO L226 Difference]: Without dead ends: 98 [2021-08-30 17:07:04,102 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 5004.09ms TimeCoverageRelationStatistics Valid=341, Invalid=3564, Unknown=1, NotChecked=0, Total=3906 [2021-08-30 17:07:04,103 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 78 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 596.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.34ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 702.82ms IncrementalHoareTripleChecker+Time [2021-08-30 17:07:04,103 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 39 Invalid, 1572 Unknown, 0 Unchecked, 4.34ms Time], IncrementalHoareTripleChecker [25 Valid, 1452 Invalid, 0 Unknown, 95 Unchecked, 702.82ms Time] [2021-08-30 17:07:04,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-30 17:07:04,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-08-30 17:07:04,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 74 states have (on average 1.2567567567567568) internal successors, (93), 89 states have internal predecessors, (93), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 17:07:04,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-08-30 17:07:04,105 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 47 [2021-08-30 17:07:04,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:07:04,105 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-08-30 17:07:04,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:07:04,106 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-08-30 17:07:04,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-30 17:07:04,106 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:07:04,106 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-08-30 17:07:04,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-30 17:07:04,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:07:04,317 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr17ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:07:04,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:07:04,317 INFO L82 PathProgramCache]: Analyzing trace with hash -735988426, now seen corresponding path program 1 times [2021-08-30 17:07:04,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:07:04,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722525049] [2021-08-30 17:07:04,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:07:04,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:07:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:07:04,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:07:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:07:04,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:07:04,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:07:04,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-30 17:07:04,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:07:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:07:05,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:07:05,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722525049] [2021-08-30 17:07:05,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722525049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:07:05,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66797115] [2021-08-30 17:07:05,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:07:05,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:07:05,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:07:05,003 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) [2021-08-30 17:07:05,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-30 17:07:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:07:05,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 85 conjunts are in the unsatisfiable core [2021-08-30 17:07:05,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:07:05,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 17:07:05,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 17:07:05,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-30 17:07:05,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 17:07:05,349 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-08-30 17:07:05,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 38 [2021-08-30 17:07:05,450 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-30 17:07:05,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-08-30 17:07:32,040 INFO L354 Elim1Store]: treesize reduction 445, result has 6.7 percent of original size [2021-08-30 17:07:32,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 204 treesize of output 130 [2021-08-30 17:07:32,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 211 [2021-08-30 17:07:32,049 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-30 17:07:32,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 62 [2021-08-30 17:07:32,062 INFO L354 Elim1Store]: treesize reduction 84, result has 30.6 percent of original size [2021-08-30 17:07:32,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 84 [2021-08-30 17:07:32,448 INFO L354 Elim1Store]: treesize reduction 33, result has 48.4 percent of original size [2021-08-30 17:07:32,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 54 [2021-08-30 17:07:32,543 INFO L354 Elim1Store]: treesize reduction 50, result has 38.3 percent of original size [2021-08-30 17:07:32,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 136 treesize of output 76 [2021-08-30 17:07:32,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 52 [2021-08-30 17:07:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:07:33,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:07:33,283 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 17:07:33,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2021-08-30 17:07:33,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-08-30 17:07:35,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66797115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:07:35,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 17:07:35,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 46 [2021-08-30 17:07:35,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208884523] [2021-08-30 17:07:35,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-30 17:07:35,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:07:35,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-30 17:07:35,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2546, Unknown=12, NotChecked=0, Total=2756 [2021-08-30 17:07:35,894 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 47 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 43 states have internal predecessors, (86), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:08:14,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:08:14,587 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2021-08-30 17:08:14,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-30 17:08:14,588 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 43 states have internal predecessors, (86), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 51 [2021-08-30 17:08:14,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:08:14,588 INFO L225 Difference]: With dead ends: 115 [2021-08-30 17:08:14,589 INFO L226 Difference]: Without dead ends: 115 [2021-08-30 17:08:14,590 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 67731.62ms TimeCoverageRelationStatistics Valid=459, Invalid=5519, Unknown=28, NotChecked=0, Total=6006 [2021-08-30 17:08:14,590 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 118 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 2272 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 965.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 2584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.76ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 1110.36ms IncrementalHoareTripleChecker+Time [2021-08-30 17:08:14,590 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 63 Invalid, 2584 Unknown, 0 Unchecked, 5.76ms Time], IncrementalHoareTripleChecker [38 Valid, 2272 Invalid, 0 Unknown, 274 Unchecked, 1110.36ms Time] [2021-08-30 17:08:14,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-08-30 17:08:14,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2021-08-30 17:08:14,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 80 states have (on average 1.2375) internal successors, (99), 95 states have internal predecessors, (99), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 17:08:14,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2021-08-30 17:08:14,592 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 51 [2021-08-30 17:08:14,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:08:14,593 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2021-08-30 17:08:14,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 43 states have internal predecessors, (86), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:08:14,593 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2021-08-30 17:08:14,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-30 17:08:14,593 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:08:14,593 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-08-30 17:08:14,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-30 17:08:14,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:08:14,808 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:08:14,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:08:14,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1340804630, now seen corresponding path program 1 times [2021-08-30 17:08:14,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:08:14,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246735634] [2021-08-30 17:08:14,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:08:14,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:08:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:08:14,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:08:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:08:14,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:08:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:08:14,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-30 17:08:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:08:14,915 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:08:14,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:08:14,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246735634] [2021-08-30 17:08:14,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246735634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:08:14,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464823374] [2021-08-30 17:08:14,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:08:14,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:08:14,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:08:14,917 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:08:14,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-30 17:08:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:08:15,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-30 17:08:15,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:08:15,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-30 17:08:15,182 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-30 17:08:15,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-08-30 17:08:15,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-08-30 17:08:15,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-30 17:08:15,270 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 17:08:15,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-08-30 17:08:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:08:15,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:08:15,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-08-30 17:08:15,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-08-30 17:08:15,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-08-30 17:08:15,638 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-30 17:08:15,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-08-30 17:08:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:08:15,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464823374] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:08:15,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:08:15,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 22 [2021-08-30 17:08:15,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855691540] [2021-08-30 17:08:15,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-30 17:08:15,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:08:15,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-30 17:08:15,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-08-30 17:08:15,661 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 23 states, 21 states have (on average 4.523809523809524) internal successors, (95), 19 states have internal predecessors, (95), 5 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-08-30 17:08:16,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:08:16,088 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2021-08-30 17:08:16,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-30 17:08:16,089 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 4.523809523809524) internal successors, (95), 19 states have internal predecessors, (95), 5 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 52 [2021-08-30 17:08:16,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:08:16,089 INFO L225 Difference]: With dead ends: 104 [2021-08-30 17:08:16,089 INFO L226 Difference]: Without dead ends: 104 [2021-08-30 17:08:16,089 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 322.20ms TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-08-30 17:08:16,090 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 104 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 252.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.93ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 296.75ms IncrementalHoareTripleChecker+Time [2021-08-30 17:08:16,090 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 33 Invalid, 867 Unknown, 0 Unchecked, 1.93ms Time], IncrementalHoareTripleChecker [42 Valid, 777 Invalid, 0 Unknown, 48 Unchecked, 296.75ms Time] [2021-08-30 17:08:16,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-30 17:08:16,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-08-30 17:08:16,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 80 states have (on average 1.225) internal successors, (98), 94 states have internal predecessors, (98), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 17:08:16,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2021-08-30 17:08:16,092 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 52 [2021-08-30 17:08:16,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:08:16,092 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2021-08-30 17:08:16,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 4.523809523809524) internal successors, (95), 19 states have internal predecessors, (95), 5 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-08-30 17:08:16,093 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2021-08-30 17:08:16,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-30 17:08:16,093 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:08:16,093 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:08:16,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-30 17:08:16,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-30 17:08:16,297 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:08:16,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:08:16,297 INFO L82 PathProgramCache]: Analyzing trace with hash -685098252, now seen corresponding path program 1 times [2021-08-30 17:08:16,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:08:16,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048865440] [2021-08-30 17:08:16,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:08:16,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:08:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:08:16,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:08:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:08:16,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:08:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:08:16,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-30 17:08:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:08:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:08:17,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:08:17,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048865440] [2021-08-30 17:08:17,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048865440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:08:17,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579053286] [2021-08-30 17:08:17,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:08:17,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:08:17,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:08:17,384 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:08:17,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-30 17:08:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:08:17,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 99 conjunts are in the unsatisfiable core [2021-08-30 17:08:17,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:08:17,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 17:08:17,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-08-30 17:08:17,773 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-08-30 17:08:17,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 41 [2021-08-30 17:08:17,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 17:08:17,915 INFO L354 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2021-08-30 17:08:17,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-08-30 17:08:24,866 INFO L354 Elim1Store]: treesize reduction 439, result has 8.0 percent of original size [2021-08-30 17:08:24,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 228 treesize of output 144 [2021-08-30 17:08:24,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 283 treesize of output 255 [2021-08-30 17:08:24,878 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-30 17:08:24,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 192 treesize of output 98 [2021-08-30 17:08:24,887 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-08-30 17:08:24,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 114 [2021-08-30 17:08:25,477 INFO L354 Elim1Store]: treesize reduction 41, result has 48.8 percent of original size [2021-08-30 17:08:25,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 62 [2021-08-30 17:08:25,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2021-08-30 17:08:25,796 INFO L354 Elim1Store]: treesize reduction 71, result has 15.5 percent of original size [2021-08-30 17:08:25,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 42 [2021-08-30 17:08:25,894 INFO L354 Elim1Store]: treesize reduction 28, result has 30.0 percent of original size [2021-08-30 17:08:25,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 106 treesize of output 65 [2021-08-30 17:08:26,080 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-30 17:08:26,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 40 [2021-08-30 17:08:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:08:26,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:08:26,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2021-08-30 17:08:26,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 17:08:26,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 407 treesize of output 411 [2021-08-30 17:08:28,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579053286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:08:28,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 17:08:28,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 57 [2021-08-30 17:08:28,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190118223] [2021-08-30 17:08:28,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-08-30 17:08:28,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:08:28,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-08-30 17:08:28,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=4546, Unknown=4, NotChecked=0, Total=4830 [2021-08-30 17:08:28,462 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 58 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 54 states have internal predecessors, (96), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:08:34,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:08:34,932 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2021-08-30 17:08:34,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-30 17:08:34,932 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 54 states have internal predecessors, (96), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 56 [2021-08-30 17:08:34,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:08:34,933 INFO L225 Difference]: With dead ends: 109 [2021-08-30 17:08:34,933 INFO L226 Difference]: Without dead ends: 109 [2021-08-30 17:08:34,934 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 15528.17ms TimeCoverageRelationStatistics Valid=565, Invalid=8551, Unknown=4, NotChecked=0, Total=9120 [2021-08-30 17:08:34,935 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 73 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 2307 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1075.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 2534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.94ms SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 1225.77ms IncrementalHoareTripleChecker+Time [2021-08-30 17:08:34,935 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 77 Invalid, 2534 Unknown, 0 Unchecked, 5.94ms Time], IncrementalHoareTripleChecker [43 Valid, 2307 Invalid, 0 Unknown, 184 Unchecked, 1225.77ms Time] [2021-08-30 17:08:34,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-30 17:08:34,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2021-08-30 17:08:34,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 99 states have internal predecessors, (105), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 17:08:34,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 114 transitions. [2021-08-30 17:08:34,937 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 114 transitions. Word has length 56 [2021-08-30 17:08:34,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:08:34,937 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 114 transitions. [2021-08-30 17:08:34,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 54 states have internal predecessors, (96), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:08:34,937 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 114 transitions. [2021-08-30 17:08:34,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-30 17:08:34,938 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:08:34,938 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:08:34,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-30 17:08:35,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:08:35,138 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr25REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:08:35,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:08:35,139 INFO L82 PathProgramCache]: Analyzing trace with hash -685098251, now seen corresponding path program 1 times [2021-08-30 17:08:35,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:08:35,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8147628] [2021-08-30 17:08:35,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:08:35,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:08:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:08:35,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:08:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:08:35,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:08:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:08:35,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-30 17:08:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:08:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:08:35,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:08:35,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8147628] [2021-08-30 17:08:35,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8147628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:08:35,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769413609] [2021-08-30 17:08:35,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:08:35,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:08:35,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:08:35,838 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:08:35,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-30 17:08:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:08:35,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 76 conjunts are in the unsatisfiable core [2021-08-30 17:08:35,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:08:36,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 17:08:36,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 17:08:36,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 17:08:36,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-08-30 17:08:37,928 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-08-30 17:08:37,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 80 [2021-08-30 17:08:38,753 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-08-30 17:08:38,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 59 [2021-08-30 17:08:38,778 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-30 17:08:38,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-08-30 17:08:39,284 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-08-30 17:08:39,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 96 treesize of output 77 [2021-08-30 17:08:39,301 INFO L354 Elim1Store]: treesize reduction 72, result has 13.3 percent of original size [2021-08-30 17:08:39,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 68 treesize of output 53 [2021-08-30 17:08:39,402 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-30 17:08:39,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 41 [2021-08-30 17:08:39,406 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-30 17:08:39,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-08-30 17:08:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:08:39,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:08:39,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 17:08:39,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 180 treesize of output 182 [2021-08-30 17:08:40,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769413609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:08:40,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 17:08:40,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 36 [2021-08-30 17:08:40,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289873190] [2021-08-30 17:08:40,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-30 17:08:40,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:08:40,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-30 17:08:40,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1902, Unknown=1, NotChecked=0, Total=2070 [2021-08-30 17:08:40,084 INFO L87 Difference]: Start difference. First operand 108 states and 114 transitions. Second operand has 37 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 34 states have internal predecessors, (87), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-30 17:08:45,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:08:45,792 INFO L93 Difference]: Finished difference Result 117 states and 123 transitions. [2021-08-30 17:08:45,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-30 17:08:45,793 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 34 states have internal predecessors, (87), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 56 [2021-08-30 17:08:45,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:08:45,793 INFO L225 Difference]: With dead ends: 117 [2021-08-30 17:08:45,794 INFO L226 Difference]: Without dead ends: 117 [2021-08-30 17:08:45,794 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 8394.19ms TimeCoverageRelationStatistics Valid=377, Invalid=3910, Unknown=3, NotChecked=0, Total=4290 [2021-08-30 17:08:45,795 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 84 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 1519 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 638.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.50ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 730.60ms IncrementalHoareTripleChecker+Time [2021-08-30 17:08:45,795 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 57 Invalid, 1732 Unknown, 0 Unchecked, 4.50ms Time], IncrementalHoareTripleChecker [41 Valid, 1519 Invalid, 0 Unknown, 172 Unchecked, 730.60ms Time] [2021-08-30 17:08:45,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-08-30 17:08:45,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2021-08-30 17:08:45,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 89 states have (on average 1.2359550561797752) internal successors, (110), 103 states have internal predecessors, (110), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 17:08:45,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 119 transitions. [2021-08-30 17:08:45,797 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 119 transitions. Word has length 56 [2021-08-30 17:08:45,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:08:45,798 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 119 transitions. [2021-08-30 17:08:45,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 34 states have internal predecessors, (87), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-30 17:08:45,798 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 119 transitions. [2021-08-30 17:08:45,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-30 17:08:45,798 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:08:45,798 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:08:45,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-30 17:08:46,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-30 17:08:46,025 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr40ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:08:46,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:08:46,025 INFO L82 PathProgramCache]: Analyzing trace with hash -685098896, now seen corresponding path program 1 times [2021-08-30 17:08:46,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:08:46,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486204391] [2021-08-30 17:08:46,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:08:46,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:08:46,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:08:46,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:08:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:08:46,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:08:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:08:46,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-30 17:08:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:08:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:08:46,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:08:46,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486204391] [2021-08-30 17:08:46,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486204391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:08:46,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274427606] [2021-08-30 17:08:46,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:08:46,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:08:46,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:08:46,477 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:08:46,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-30 17:08:46,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:08:46,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-30 17:08:46,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:08:46,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-30 17:08:56,674 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-30 17:08:56,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 36 [2021-08-30 17:08:56,681 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-30 17:08:56,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-08-30 17:08:56,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-08-30 17:08:57,063 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-30 17:08:57,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 26 [2021-08-30 17:08:57,119 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-30 17:08:57,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-08-30 17:08:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:08:57,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:08:57,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-08-30 17:08:57,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274427606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:08:57,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 17:08:57,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 35 [2021-08-30 17:08:57,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454628109] [2021-08-30 17:08:57,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-30 17:08:57,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:08:57,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-30 17:08:57,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1203, Unknown=7, NotChecked=0, Total=1332 [2021-08-30 17:08:57,343 INFO L87 Difference]: Start difference. First operand 112 states and 119 transitions. Second operand has 35 states, 34 states have (on average 2.5) internal successors, (85), 32 states have internal predecessors, (85), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-30 17:09:07,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:09:07,230 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2021-08-30 17:09:07,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-30 17:09:07,230 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.5) internal successors, (85), 32 states have internal predecessors, (85), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 56 [2021-08-30 17:09:07,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:09:07,231 INFO L225 Difference]: With dead ends: 112 [2021-08-30 17:09:07,231 INFO L226 Difference]: Without dead ends: 112 [2021-08-30 17:09:07,231 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 19581.60ms TimeCoverageRelationStatistics Valid=320, Invalid=2855, Unknown=17, NotChecked=0, Total=3192 [2021-08-30 17:09:07,231 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 61 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 572.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.83ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 659.59ms IncrementalHoareTripleChecker+Time [2021-08-30 17:09:07,231 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 74 Invalid, 1661 Unknown, 0 Unchecked, 3.83ms Time], IncrementalHoareTripleChecker [25 Valid, 1537 Invalid, 0 Unknown, 99 Unchecked, 659.59ms Time] [2021-08-30 17:09:07,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-08-30 17:09:07,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-08-30 17:09:07,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 89 states have (on average 1.2134831460674158) internal successors, (108), 103 states have internal predecessors, (108), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 17:09:07,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 117 transitions. [2021-08-30 17:09:07,234 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 117 transitions. Word has length 56 [2021-08-30 17:09:07,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:09:07,234 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 117 transitions. [2021-08-30 17:09:07,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.5) internal successors, (85), 32 states have internal predecessors, (85), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-30 17:09:07,234 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 117 transitions. [2021-08-30 17:09:07,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-30 17:09:07,234 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:09:07,234 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:09:07,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-30 17:09:07,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-30 17:09:07,435 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr35ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:09:07,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:09:07,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1896261991, now seen corresponding path program 1 times [2021-08-30 17:09:07,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:09:07,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967342216] [2021-08-30 17:09:07,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:09:07,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:09:07,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:09:07,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:09:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:09:07,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:09:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:09:07,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-30 17:09:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:09:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:09:07,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:09:07,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967342216] [2021-08-30 17:09:07,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967342216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:09:07,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000572965] [2021-08-30 17:09:07,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:09:07,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:09:07,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:09:07,977 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:09:07,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-30 17:09:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:09:08,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-30 17:09:08,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:09:08,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 17:09:11,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2021-08-30 17:09:12,121 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-08-30 17:09:12,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 33 [2021-08-30 17:09:12,132 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-30 17:09:12,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-08-30 17:09:12,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-30 17:09:12,495 INFO L354 Elim1Store]: treesize reduction 72, result has 13.3 percent of original size [2021-08-30 17:09:12,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 31 [2021-08-30 17:09:12,604 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-30 17:09:12,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2021-08-30 17:09:12,607 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:09:12,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:09:12,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000572965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:09:12,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 17:09:12,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 35 [2021-08-30 17:09:12,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103481242] [2021-08-30 17:09:12,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-30 17:09:12,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:09:12,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-30 17:09:12,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1259, Unknown=3, NotChecked=0, Total=1406 [2021-08-30 17:09:12,819 INFO L87 Difference]: Start difference. First operand 112 states and 117 transitions. Second operand has 36 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 33 states have internal predecessors, (95), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-30 17:09:18,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:09:18,282 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2021-08-30 17:09:18,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-30 17:09:18,283 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 33 states have internal predecessors, (95), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 60 [2021-08-30 17:09:18,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:09:18,283 INFO L225 Difference]: With dead ends: 117 [2021-08-30 17:09:18,283 INFO L226 Difference]: Without dead ends: 117 [2021-08-30 17:09:18,284 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 9406.18ms TimeCoverageRelationStatistics Valid=254, Invalid=2190, Unknown=6, NotChecked=0, Total=2450 [2021-08-30 17:09:18,284 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 53 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 304.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.36ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 354.05ms IncrementalHoareTripleChecker+Time [2021-08-30 17:09:18,284 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 52 Invalid, 1037 Unknown, 0 Unchecked, 2.36ms Time], IncrementalHoareTripleChecker [15 Valid, 851 Invalid, 0 Unknown, 171 Unchecked, 354.05ms Time] [2021-08-30 17:09:18,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-08-30 17:09:18,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2021-08-30 17:09:18,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 93 states have (on average 1.2150537634408602) internal successors, (113), 107 states have internal predecessors, (113), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 17:09:18,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 122 transitions. [2021-08-30 17:09:18,286 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 122 transitions. Word has length 60 [2021-08-30 17:09:18,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:09:18,287 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 122 transitions. [2021-08-30 17:09:18,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 33 states have internal predecessors, (95), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-30 17:09:18,287 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 122 transitions. [2021-08-30 17:09:18,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-30 17:09:18,287 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:09:18,287 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:09:18,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-30 17:09:18,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-30 17:09:18,506 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr29REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:09:18,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:09:18,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1896248059, now seen corresponding path program 1 times [2021-08-30 17:09:18,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:09:18,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175474864] [2021-08-30 17:09:18,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:09:18,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:09:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:09:18,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:09:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:09:18,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:09:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:09:18,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-30 17:09:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:09:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:09:19,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:09:19,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175474864] [2021-08-30 17:09:19,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175474864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:09:19,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294502880] [2021-08-30 17:09:19,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:09:19,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:09:19,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:09:19,202 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:09:19,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-30 17:09:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:09:19,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-30 17:09:19,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:09:19,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 17:09:19,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 17:09:19,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 17:09:19,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-08-30 17:09:19,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 17:09:19,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-08-30 17:09:19,675 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-08-30 17:09:19,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 50 [2021-08-30 17:09:19,688 INFO L354 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2021-08-30 17:09:19,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 70 [2021-08-30 17:09:19,797 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-30 17:09:19,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-08-30 17:09:20,238 INFO L354 Elim1Store]: treesize reduction 96, result has 10.3 percent of original size [2021-08-30 17:09:20,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 88 treesize of output 65 [2021-08-30 17:09:20,253 INFO L354 Elim1Store]: treesize reduction 72, result has 13.3 percent of original size [2021-08-30 17:09:20,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 53 [2021-08-30 17:09:20,522 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-30 17:09:20,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 47 [2021-08-30 17:09:20,526 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-30 17:09:20,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2021-08-30 17:09:20,530 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:09:20,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:09:21,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 17:09:21,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 102 [2021-08-30 17:09:23,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 17:09:23,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 342 treesize of output 346 [2021-08-30 17:09:32,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 17:09:32,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 84877 treesize of output 80213 [2021-08-30 17:09:35,519 INFO L354 Elim1Store]: treesize reduction 792, result has 41.5 percent of original size [2021-08-30 17:09:35,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 17 select indices, 17 select index equivalence classes, 0 disjoint index pairs (out of 136 index pairs), introduced 18 new quantified variables, introduced 136 case distinctions, treesize of input 826989 treesize of output 803193 [2021-08-30 17:10:18,214 WARN L210 SmtUtils]: Spent 42.69s on a formula simplification. DAG size of input: 1592 DAG size of output: 1587 [2021-08-30 17:10:27,435 WARN L210 SmtUtils]: Spent 9.20s on a formula simplification. DAG size of input: 1528 DAG size of output: 1525 [2021-08-30 17:10:27,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-08-30 17:10:27,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:10:27,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-08-30 17:10:27,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430596057] [2021-08-30 17:10:27,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-30 17:10:27,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:10:27,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-30 17:10:27,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2873, Unknown=5, NotChecked=0, Total=3080 [2021-08-30 17:10:27,447 INFO L87 Difference]: Start difference. First operand 116 states and 122 transitions. Second operand has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-30 17:10:29,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:10:29,383 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2021-08-30 17:10:29,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-30 17:10:29,384 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2021-08-30 17:10:29,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:10:29,384 INFO L225 Difference]: With dead ends: 139 [2021-08-30 17:10:29,384 INFO L226 Difference]: Without dead ends: 139 [2021-08-30 17:10:29,385 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 13029.74ms TimeCoverageRelationStatistics Valid=465, Invalid=5850, Unknown=5, NotChecked=0, Total=6320 [2021-08-30 17:10:29,385 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 188 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 595.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.96ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 687.33ms IncrementalHoareTripleChecker+Time [2021-08-30 17:10:29,386 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 49 Invalid, 1480 Unknown, 0 Unchecked, 3.96ms Time], IncrementalHoareTripleChecker [32 Valid, 1448 Invalid, 0 Unknown, 0 Unchecked, 687.33ms Time] [2021-08-30 17:10:29,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-08-30 17:10:29,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 118. [2021-08-30 17:10:29,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 95 states have (on average 1.2210526315789474) internal successors, (116), 109 states have internal predecessors, (116), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 17:10:29,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 125 transitions. [2021-08-30 17:10:29,388 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 125 transitions. Word has length 60 [2021-08-30 17:10:29,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:10:29,388 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 125 transitions. [2021-08-30 17:10:29,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-30 17:10:29,388 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 125 transitions. [2021-08-30 17:10:29,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-30 17:10:29,389 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:10:29,389 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:10:29,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-30 17:10:29,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-30 17:10:29,607 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:10:29,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:10:29,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1896248058, now seen corresponding path program 1 times [2021-08-30 17:10:29,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:10:29,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595746205] [2021-08-30 17:10:29,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:10:29,608 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:10:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:10:29,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:10:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:10:29,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:10:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:10:29,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-30 17:10:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:10:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-30 17:10:29,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:10:29,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595746205] [2021-08-30 17:10:29,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595746205] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:10:29,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:10:29,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 17:10:29,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943560387] [2021-08-30 17:10:29,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 17:10:29,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:10:29,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 17:10:29,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-30 17:10:29,676 INFO L87 Difference]: Start difference. First operand 118 states and 125 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:10:29,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:10:29,893 INFO L93 Difference]: Finished difference Result 123 states and 129 transitions. [2021-08-30 17:10:29,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:10:29,894 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 60 [2021-08-30 17:10:29,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:10:29,894 INFO L225 Difference]: With dead ends: 123 [2021-08-30 17:10:29,894 INFO L226 Difference]: Without dead ends: 123 [2021-08-30 17:10:29,894 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.56ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-30 17:10:29,895 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 151.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.92ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 179.97ms IncrementalHoareTripleChecker+Time [2021-08-30 17:10:29,895 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 24 Invalid, 393 Unknown, 0 Unchecked, 0.92ms Time], IncrementalHoareTripleChecker [4 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 179.97ms Time] [2021-08-30 17:10:29,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-08-30 17:10:29,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2021-08-30 17:10:29,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 95 states have (on average 1.2) internal successors, (114), 108 states have internal predecessors, (114), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 17:10:29,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 123 transitions. [2021-08-30 17:10:29,902 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 123 transitions. Word has length 60 [2021-08-30 17:10:29,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:10:29,902 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 123 transitions. [2021-08-30 17:10:29,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:10:29,903 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 123 transitions. [2021-08-30 17:10:29,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-30 17:10:29,903 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:10:29,903 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:10:29,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-08-30 17:10:29,903 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr36ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:10:29,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:10:29,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1345420281, now seen corresponding path program 1 times [2021-08-30 17:10:29,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:10:29,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258294404] [2021-08-30 17:10:29,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:10:29,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:10:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:10:30,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:10:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:10:30,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:10:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:10:30,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-30 17:10:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:10:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:10:30,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:10:30,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258294404] [2021-08-30 17:10:30,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258294404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:10:30,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595752478] [2021-08-30 17:10:30,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:10:30,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:10:30,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:10:30,334 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:10:30,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-30 17:10:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:10:30,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-30 17:10:30,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:10:30,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-30 17:10:30,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-30 17:10:43,570 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-30 17:10:43,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 40 [2021-08-30 17:10:43,576 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-30 17:10:43,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-08-30 17:10:43,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-08-30 17:10:43,937 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-30 17:10:43,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 30 [2021-08-30 17:10:44,044 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-30 17:10:44,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-08-30 17:10:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:10:44,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:10:44,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-08-30 17:10:44,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595752478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:10:44,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 17:10:44,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 34 [2021-08-30 17:10:44,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815931703] [2021-08-30 17:10:44,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-30 17:10:44,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:10:44,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-30 17:10:44,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1205, Unknown=9, NotChecked=0, Total=1332 [2021-08-30 17:10:44,296 INFO L87 Difference]: Start difference. First operand 117 states and 123 transitions. Second operand has 35 states, 33 states have (on average 2.909090909090909) internal successors, (96), 32 states have internal predecessors, (96), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-30 17:11:18,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:11:18,544 INFO L93 Difference]: Finished difference Result 127 states and 135 transitions. [2021-08-30 17:11:18,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-30 17:11:18,545 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.909090909090909) internal successors, (96), 32 states have internal predecessors, (96), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 61 [2021-08-30 17:11:18,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:11:18,547 INFO L225 Difference]: With dead ends: 127 [2021-08-30 17:11:18,547 INFO L226 Difference]: Without dead ends: 127 [2021-08-30 17:11:18,547 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 47023.99ms TimeCoverageRelationStatistics Valid=253, Invalid=2577, Unknown=32, NotChecked=0, Total=2862 [2021-08-30 17:11:18,547 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 509.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.56ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 251 IncrementalHoareTripleChecker+Unchecked, 585.62ms IncrementalHoareTripleChecker+Time [2021-08-30 17:11:18,548 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 57 Invalid, 1421 Unknown, 0 Unchecked, 3.56ms Time], IncrementalHoareTripleChecker [22 Valid, 1148 Invalid, 0 Unknown, 251 Unchecked, 585.62ms Time] [2021-08-30 17:11:18,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-08-30 17:11:18,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 122. [2021-08-30 17:11:18,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 100 states have (on average 1.2) internal successors, (120), 113 states have internal predecessors, (120), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 17:11:18,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 129 transitions. [2021-08-30 17:11:18,550 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 129 transitions. Word has length 61 [2021-08-30 17:11:18,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:11:18,551 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 129 transitions. [2021-08-30 17:11:18,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.909090909090909) internal successors, (96), 32 states have internal predecessors, (96), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-30 17:11:18,551 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 129 transitions. [2021-08-30 17:11:18,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-30 17:11:18,551 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:11:18,551 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:11:18,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-30 17:11:18,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:11:18,753 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr30ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:11:18,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:11:18,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1345852280, now seen corresponding path program 1 times [2021-08-30 17:11:18,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:11:18,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603827368] [2021-08-30 17:11:18,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:11:18,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:11:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:11:19,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:11:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:11:19,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:11:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:11:19,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-30 17:11:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:11:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:11:20,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:11:20,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603827368] [2021-08-30 17:11:20,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603827368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:11:20,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409492934] [2021-08-30 17:11:20,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:11:20,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:11:20,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:11:20,083 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:11:20,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-30 17:11:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:11:20,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 102 conjunts are in the unsatisfiable core [2021-08-30 17:11:20,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:11:20,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 17:11:20,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 17:11:20,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-08-30 17:11:20,474 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-30 17:11:20,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-08-30 17:11:40,833 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-30 17:11:40,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 133 [2021-08-30 17:11:40,873 INFO L354 Elim1Store]: treesize reduction 490, result has 9.8 percent of original size [2021-08-30 17:11:40,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 259 treesize of output 188 [2021-08-30 17:11:40,884 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-08-30 17:11:40,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 251 treesize of output 249 [2021-08-30 17:11:40,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 17:11:40,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 62 [2021-08-30 17:11:41,912 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-08-30 17:11:41,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 143 treesize of output 100 [2021-08-30 17:11:41,962 INFO L354 Elim1Store]: treesize reduction 256, result has 10.2 percent of original size [2021-08-30 17:11:41,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 19 case distinctions, treesize of input 103 treesize of output 99 [2021-08-30 17:11:42,282 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-30 17:11:42,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 58 [2021-08-30 17:11:42,412 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-30 17:11:42,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 36 [2021-08-30 17:11:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:11:42,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:11:43,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409492934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:11:43,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 17:11:43,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27] total 54 [2021-08-30 17:11:43,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718398669] [2021-08-30 17:11:43,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-30 17:11:43,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:11:43,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-30 17:11:43,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=4145, Unknown=9, NotChecked=0, Total=4422 [2021-08-30 17:11:43,654 INFO L87 Difference]: Start difference. First operand 122 states and 129 transitions. Second operand has 55 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 states have internal predecessors, (101), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:11:51,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:11:51,945 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2021-08-30 17:11:51,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-30 17:11:51,945 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 states have internal predecessors, (101), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 61 [2021-08-30 17:11:51,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:11:51,946 INFO L225 Difference]: With dead ends: 124 [2021-08-30 17:11:51,946 INFO L226 Difference]: Without dead ends: 124 [2021-08-30 17:11:51,947 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 29698.43ms TimeCoverageRelationStatistics Valid=572, Invalid=7429, Unknown=9, NotChecked=0, Total=8010 [2021-08-30 17:11:51,947 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 116 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 2099 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1112.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 2400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.40ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 1262.45ms IncrementalHoareTripleChecker+Time [2021-08-30 17:11:51,947 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 82 Invalid, 2400 Unknown, 0 Unchecked, 6.40ms Time], IncrementalHoareTripleChecker [58 Valid, 2099 Invalid, 0 Unknown, 243 Unchecked, 1262.45ms Time] [2021-08-30 17:11:51,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-08-30 17:11:51,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2021-08-30 17:11:51,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 101 states have (on average 1.198019801980198) internal successors, (121), 114 states have internal predecessors, (121), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 17:11:51,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2021-08-30 17:11:51,949 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 61 [2021-08-30 17:11:51,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:11:51,950 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2021-08-30 17:11:51,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 states have internal predecessors, (101), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:11:51,950 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2021-08-30 17:11:51,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-30 17:11:51,950 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:11:51,950 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:11:51,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-30 17:11:52,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-30 17:11:52,169 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr10ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:11:52,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:11:52,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1688518945, now seen corresponding path program 2 times [2021-08-30 17:11:52,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:11:52,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281798630] [2021-08-30 17:11:52,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:11:52,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:11:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:11:52,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:11:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:11:52,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:11:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:11:52,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-30 17:11:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:11:52,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-08-30 17:11:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:11:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-30 17:11:53,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:11:53,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281798630] [2021-08-30 17:11:53,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281798630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:11:53,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189938847] [2021-08-30 17:11:53,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 17:11:53,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:11:53,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:11:53,322 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:11:53,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-30 17:11:53,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 17:11:53,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:11:53,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 118 conjunts are in the unsatisfiable core [2021-08-30 17:11:53,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:11:53,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 17:11:53,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-30 17:11:53,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-08-30 17:11:53,725 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-08-30 17:11:53,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2021-08-30 17:11:53,812 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-30 17:11:53,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-08-30 17:11:54,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 112 [2021-08-30 17:11:54,756 INFO L354 Elim1Store]: treesize reduction 489, result has 8.9 percent of original size [2021-08-30 17:11:54,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 256 treesize of output 180 [2021-08-30 17:11:54,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 194 [2021-08-30 17:11:54,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 17:11:54,785 INFO L354 Elim1Store]: treesize reduction 51, result has 30.1 percent of original size [2021-08-30 17:11:54,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 194 treesize of output 204 [2021-08-30 17:11:54,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 38 [2021-08-30 17:11:55,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 106 [2021-08-30 17:11:55,757 INFO L354 Elim1Store]: treesize reduction 931, result has 8.3 percent of original size [2021-08-30 17:11:55,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 20 case distinctions, treesize of input 291 treesize of output 234 [2021-08-30 17:11:55,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 169 [2021-08-30 17:11:55,770 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-30 17:11:55,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 169 treesize of output 128 [2021-08-30 17:11:55,790 INFO L354 Elim1Store]: treesize reduction 36, result has 41.0 percent of original size [2021-08-30 17:11:55,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 95 treesize of output 107 [2021-08-30 17:11:56,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 81 [2021-08-30 17:11:56,561 INFO L354 Elim1Store]: treesize reduction 110, result has 2.7 percent of original size [2021-08-30 17:11:56,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 84 treesize of output 54 [2021-08-30 17:11:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 17 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:11:56,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:11:57,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189938847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:11:57,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 17:11:57,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 54 [2021-08-30 17:11:57,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333207735] [2021-08-30 17:11:57,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-30 17:11:57,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:11:57,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-30 17:11:57,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=3292, Unknown=0, NotChecked=0, Total=3540 [2021-08-30 17:11:57,285 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand has 55 states, 52 states have (on average 1.9230769230769231) internal successors, (100), 51 states have internal predecessors, (100), 6 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-08-30 17:12:00,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:12:00,512 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2021-08-30 17:12:00,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-30 17:12:00,513 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.9230769230769231) internal successors, (100), 51 states have internal predecessors, (100), 6 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 62 [2021-08-30 17:12:00,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:12:00,513 INFO L225 Difference]: With dead ends: 122 [2021-08-30 17:12:00,513 INFO L226 Difference]: Without dead ends: 122 [2021-08-30 17:12:00,514 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1969 ImplicationChecksByTransitivity, 4450.04ms TimeCoverageRelationStatistics Valid=578, Invalid=6732, Unknown=0, NotChecked=0, Total=7310 [2021-08-30 17:12:00,514 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 100 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 2001 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1172.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.21ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 1324.31ms IncrementalHoareTripleChecker+Time [2021-08-30 17:12:00,514 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 53 Invalid, 2180 Unknown, 0 Unchecked, 6.21ms Time], IncrementalHoareTripleChecker [50 Valid, 2001 Invalid, 0 Unknown, 129 Unchecked, 1324.31ms Time] [2021-08-30 17:12:00,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-08-30 17:12:00,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-08-30 17:12:00,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 101 states have (on average 1.188118811881188) internal successors, (120), 113 states have internal predecessors, (120), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 17:12:00,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 129 transitions. [2021-08-30 17:12:00,516 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 129 transitions. Word has length 62 [2021-08-30 17:12:00,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:12:00,517 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 129 transitions. [2021-08-30 17:12:00,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.9230769230769231) internal successors, (100), 51 states have internal predecessors, (100), 6 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-08-30 17:12:00,517 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 129 transitions. [2021-08-30 17:12:00,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-30 17:12:00,517 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:12:00,517 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:12:00,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-30 17:12:00,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:12:00,729 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr37ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:12:00,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:12:00,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1241644393, now seen corresponding path program 1 times [2021-08-30 17:12:00,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:12:00,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756811670] [2021-08-30 17:12:00,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:12:00,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:12:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:12:00,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:12:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:12:00,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:12:00,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:12:00,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-30 17:12:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:12:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-30 17:12:00,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:12:00,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756811670] [2021-08-30 17:12:00,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756811670] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:12:00,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:12:00,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 17:12:00,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129487452] [2021-08-30 17:12:00,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 17:12:00,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:12:00,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 17:12:00,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-30 17:12:00,793 INFO L87 Difference]: Start difference. First operand 122 states and 129 transitions. Second operand has 7 states, 6 states have (on average 7.5) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:12:01,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:12:01,009 INFO L93 Difference]: Finished difference Result 127 states and 134 transitions. [2021-08-30 17:12:01,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:12:01,010 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.5) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 62 [2021-08-30 17:12:01,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:12:01,010 INFO L225 Difference]: With dead ends: 127 [2021-08-30 17:12:01,010 INFO L226 Difference]: Without dead ends: 127 [2021-08-30 17:12:01,010 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 58.46ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-30 17:12:01,011 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 155.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.07ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 182.58ms IncrementalHoareTripleChecker+Time [2021-08-30 17:12:01,011 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 24 Invalid, 398 Unknown, 0 Unchecked, 1.07ms Time], IncrementalHoareTripleChecker [4 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 182.58ms Time] [2021-08-30 17:12:01,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-08-30 17:12:01,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-08-30 17:12:01,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 104 states have (on average 1.2019230769230769) internal successors, (125), 116 states have internal predecessors, (125), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 17:12:01,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 134 transitions. [2021-08-30 17:12:01,013 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 134 transitions. Word has length 62 [2021-08-30 17:12:01,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:12:01,013 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 134 transitions. [2021-08-30 17:12:01,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.5) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:12:01,013 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 134 transitions. [2021-08-30 17:12:01,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-30 17:12:01,014 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:12:01,014 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:12:01,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-08-30 17:12:01,014 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr31ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:12:01,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:12:01,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1228252410, now seen corresponding path program 1 times [2021-08-30 17:12:01,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:12:01,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825008140] [2021-08-30 17:12:01,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:12:01,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:12:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:12:01,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:12:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:12:01,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:12:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:12:01,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-30 17:12:01,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:12:02,352 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:12:02,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:12:02,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825008140] [2021-08-30 17:12:02,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825008140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:12:02,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224902574] [2021-08-30 17:12:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:12:02,353 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:12:02,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:12:02,353 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 17:12:02,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-30 17:12:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:12:02,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 94 conjunts are in the unsatisfiable core [2021-08-30 17:12:02,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:12:02,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 17:12:02,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-30 17:12:02,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 17:12:02,754 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-08-30 17:12:02,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 36 [2021-08-30 17:12:02,860 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-30 17:12:02,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-08-30 17:12:02,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 17:12:02,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 28 [2021-08-30 17:12:25,083 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-30 17:12:25,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 104 [2021-08-30 17:12:25,099 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-08-30 17:12:25,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 68 [2021-08-30 17:12:25,108 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-08-30 17:12:25,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 71 [2021-08-30 17:12:25,804 INFO L354 Elim1Store]: treesize reduction 100, result has 18.7 percent of original size [2021-08-30 17:12:25,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 108 treesize of output 87 [2021-08-30 17:12:25,821 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-08-30 17:12:25,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 73 [2021-08-30 17:12:26,210 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-30 17:12:26,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 59 [2021-08-30 17:12:26,313 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-30 17:12:26,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 31 [2021-08-30 17:12:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:12:26,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:12:27,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224902574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:12:27,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 17:12:27,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 23] total 51 [2021-08-30 17:12:27,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425090239] [2021-08-30 17:12:27,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-30 17:12:27,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:12:27,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-30 17:12:27,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=3690, Unknown=13, NotChecked=0, Total=3906 [2021-08-30 17:12:27,307 INFO L87 Difference]: Start difference. First operand 125 states and 134 transitions. Second operand has 52 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:13:05,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:13:05,069 INFO L93 Difference]: Finished difference Result 130 states and 139 transitions. [2021-08-30 17:13:05,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-30 17:13:05,070 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 62 [2021-08-30 17:13:05,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:13:05,070 INFO L225 Difference]: With dead ends: 130 [2021-08-30 17:13:05,071 INFO L226 Difference]: Without dead ends: 130 [2021-08-30 17:13:05,071 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1949 ImplicationChecksByTransitivity, 60893.50ms TimeCoverageRelationStatistics Valid=643, Invalid=8644, Unknown=25, NotChecked=0, Total=9312 [2021-08-30 17:13:05,072 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 175 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 2081 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1007.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 2349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.35ms SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 1149.57ms IncrementalHoareTripleChecker+Time [2021-08-30 17:13:05,072 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 88 Invalid, 2349 Unknown, 0 Unchecked, 5.35ms Time], IncrementalHoareTripleChecker [71 Valid, 2081 Invalid, 0 Unknown, 197 Unchecked, 1149.57ms Time] [2021-08-30 17:13:05,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-08-30 17:13:05,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2021-08-30 17:13:05,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 105 states have (on average 1.2) internal successors, (126), 117 states have internal predecessors, (126), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 17:13:05,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 135 transitions. [2021-08-30 17:13:05,075 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 135 transitions. Word has length 62 [2021-08-30 17:13:05,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:13:05,077 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 135 transitions. [2021-08-30 17:13:05,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:13:05,077 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 135 transitions. [2021-08-30 17:13:05,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-30 17:13:05,077 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:13:05,077 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:13:05,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-30 17:13:05,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:13:05,293 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr38REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:13:05,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:13:05,293 INFO L82 PathProgramCache]: Analyzing trace with hash -163729334, now seen corresponding path program 1 times [2021-08-30 17:13:05,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:13:05,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69006195] [2021-08-30 17:13:05,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:13:05,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:13:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:13:05,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:13:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:13:05,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:13:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:13:05,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-30 17:13:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:13:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-30 17:13:05,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:13:05,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69006195] [2021-08-30 17:13:05,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69006195] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:13:05,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:13:05,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-30 17:13:05,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694309671] [2021-08-30 17:13:05,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 17:13:05,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:13:05,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 17:13:05,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:13:05,398 INFO L87 Difference]: Start difference. First operand 126 states and 135 transitions. Second operand has 9 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:13:05,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:13:05,589 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2021-08-30 17:13:05,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 17:13:05,590 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2021-08-30 17:13:05,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:13:05,590 INFO L225 Difference]: With dead ends: 125 [2021-08-30 17:13:05,590 INFO L226 Difference]: Without dead ends: 125 [2021-08-30 17:13:05,590 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 72.87ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-30 17:13:05,591 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 128 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 140.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.92ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 165.53ms IncrementalHoareTripleChecker+Time [2021-08-30 17:13:05,591 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 24 Invalid, 363 Unknown, 0 Unchecked, 0.92ms Time], IncrementalHoareTripleChecker [23 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 165.53ms Time] [2021-08-30 17:13:05,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-08-30 17:13:05,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-08-30 17:13:05,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 105 states have (on average 1.1904761904761905) internal successors, (125), 116 states have internal predecessors, (125), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 17:13:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 134 transitions. [2021-08-30 17:13:05,593 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 134 transitions. Word has length 63 [2021-08-30 17:13:05,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:13:05,594 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 134 transitions. [2021-08-30 17:13:05,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:13:05,594 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 134 transitions. [2021-08-30 17:13:05,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-30 17:13:05,594 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:13:05,594 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:13:05,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-08-30 17:13:05,595 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting mainErr32ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-08-30 17:13:05,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:13:05,595 INFO L82 PathProgramCache]: Analyzing trace with hash -578880822, now seen corresponding path program 1 times [2021-08-30 17:13:05,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:13:05,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826480352] [2021-08-30 17:13:05,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:13:05,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:13:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 17:13:05,612 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-30 17:13:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 17:13:05,649 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-30 17:13:05,650 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-30 17:13:05,650 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr32ASSERT_VIOLATIONMEMORY_FREE (54 of 55 remaining) [2021-08-30 17:13:05,652 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION (53 of 55 remaining) [2021-08-30 17:13:05,652 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION (52 of 55 remaining) [2021-08-30 17:13:05,652 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION (51 of 55 remaining) [2021-08-30 17:13:05,652 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION (50 of 55 remaining) [2021-08-30 17:13:05,652 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION (49 of 55 remaining) [2021-08-30 17:13:05,652 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION (48 of 55 remaining) [2021-08-30 17:13:05,653 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION (47 of 55 remaining) [2021-08-30 17:13:05,653 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION (46 of 55 remaining) [2021-08-30 17:13:05,653 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION (45 of 55 remaining) [2021-08-30 17:13:05,653 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION (44 of 55 remaining) [2021-08-30 17:13:05,653 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10ASSERT_VIOLATIONMEMORY_FREE (43 of 55 remaining) [2021-08-30 17:13:05,653 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11ASSERT_VIOLATIONMEMORY_FREE (42 of 55 remaining) [2021-08-30 17:13:05,653 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12ASSERT_VIOLATIONMEMORY_FREE (41 of 55 remaining) [2021-08-30 17:13:05,653 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION (40 of 55 remaining) [2021-08-30 17:13:05,654 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION (39 of 55 remaining) [2021-08-30 17:13:05,654 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15ASSERT_VIOLATIONMEMORY_FREE (38 of 55 remaining) [2021-08-30 17:13:05,654 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16ASSERT_VIOLATIONMEMORY_FREE (37 of 55 remaining) [2021-08-30 17:13:05,654 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17ASSERT_VIOLATIONMEMORY_FREE (36 of 55 remaining) [2021-08-30 17:13:05,654 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION (35 of 55 remaining) [2021-08-30 17:13:05,654 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION (34 of 55 remaining) [2021-08-30 17:13:05,654 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION (33 of 55 remaining) [2021-08-30 17:13:05,654 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION (32 of 55 remaining) [2021-08-30 17:13:05,654 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION (31 of 55 remaining) [2021-08-30 17:13:05,655 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION (30 of 55 remaining) [2021-08-30 17:13:05,655 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION (29 of 55 remaining) [2021-08-30 17:13:05,655 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION (28 of 55 remaining) [2021-08-30 17:13:05,655 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26REQUIRES_VIOLATION (27 of 55 remaining) [2021-08-30 17:13:05,655 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION (26 of 55 remaining) [2021-08-30 17:13:05,655 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION (25 of 55 remaining) [2021-08-30 17:13:05,655 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION (24 of 55 remaining) [2021-08-30 17:13:05,655 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30ASSERT_VIOLATIONMEMORY_FREE (23 of 55 remaining) [2021-08-30 17:13:05,656 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31ASSERT_VIOLATIONMEMORY_FREE (22 of 55 remaining) [2021-08-30 17:13:05,656 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33REQUIRES_VIOLATION (21 of 55 remaining) [2021-08-30 17:13:05,656 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34REQUIRES_VIOLATION (20 of 55 remaining) [2021-08-30 17:13:05,656 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35ASSERT_VIOLATIONMEMORY_FREE (19 of 55 remaining) [2021-08-30 17:13:05,656 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36ASSERT_VIOLATIONMEMORY_FREE (18 of 55 remaining) [2021-08-30 17:13:05,656 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37ASSERT_VIOLATIONMEMORY_FREE (17 of 55 remaining) [2021-08-30 17:13:05,656 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr38REQUIRES_VIOLATION (16 of 55 remaining) [2021-08-30 17:13:05,656 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr39REQUIRES_VIOLATION (15 of 55 remaining) [2021-08-30 17:13:05,657 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr40ENSURES_VIOLATIONMEMORY_LEAK (14 of 55 remaining) [2021-08-30 17:13:05,657 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr0REQUIRES_VIOLATION (13 of 55 remaining) [2021-08-30 17:13:05,657 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr1REQUIRES_VIOLATION (12 of 55 remaining) [2021-08-30 17:13:05,657 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr2REQUIRES_VIOLATION (11 of 55 remaining) [2021-08-30 17:13:05,657 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr3REQUIRES_VIOLATION (10 of 55 remaining) [2021-08-30 17:13:05,657 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr4REQUIRES_VIOLATION (9 of 55 remaining) [2021-08-30 17:13:05,657 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr5REQUIRES_VIOLATION (8 of 55 remaining) [2021-08-30 17:13:05,657 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr6REQUIRES_VIOLATION (7 of 55 remaining) [2021-08-30 17:13:05,657 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr7REQUIRES_VIOLATION (6 of 55 remaining) [2021-08-30 17:13:05,658 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr8REQUIRES_VIOLATION (5 of 55 remaining) [2021-08-30 17:13:05,658 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr9REQUIRES_VIOLATION (4 of 55 remaining) [2021-08-30 17:13:05,658 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr10REQUIRES_VIOLATION (3 of 55 remaining) [2021-08-30 17:13:05,658 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr11REQUIRES_VIOLATION (2 of 55 remaining) [2021-08-30 17:13:05,658 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr12REQUIRES_VIOLATION (1 of 55 remaining) [2021-08-30 17:13:05,658 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr13REQUIRES_VIOLATION (0 of 55 remaining) [2021-08-30 17:13:05,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-08-30 17:13:05,663 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 17:13:05,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 05:13:05 BoogieIcfgContainer [2021-08-30 17:13:05,687 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 17:13:05,687 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 17:13:05,687 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 17:13:05,688 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 17:13:05,688 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:05:59" (3/4) ... [2021-08-30 17:13:05,689 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-30 17:13:05,719 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-30 17:13:05,719 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 17:13:05,719 INFO L158 Benchmark]: Toolchain (without parser) took 426771.64ms. Allocated memory was 71.3MB in the beginning and 325.1MB in the end (delta: 253.8MB). Free memory was 53.2MB in the beginning and 251.9MB in the end (delta: -198.7MB). Peak memory consumption was 56.1MB. Max. memory is 16.1GB. [2021-08-30 17:13:05,719 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 71.3MB. Free memory is still 54.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 17:13:05,719 INFO L158 Benchmark]: CACSL2BoogieTranslator took 309.72ms. Allocated memory is still 71.3MB. Free memory was 53.0MB in the beginning and 48.9MB in the end (delta: 4.2MB). Peak memory consumption was 11.4MB. Max. memory is 16.1GB. [2021-08-30 17:13:05,719 INFO L158 Benchmark]: Boogie Preprocessor took 78.03ms. Allocated memory is still 71.3MB. Free memory was 48.9MB in the beginning and 46.0MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 17:13:05,719 INFO L158 Benchmark]: RCFGBuilder took 450.06ms. Allocated memory was 71.3MB in the beginning and 100.7MB in the end (delta: 29.4MB). Free memory was 46.0MB in the beginning and 74.3MB in the end (delta: -28.4MB). Peak memory consumption was 17.8MB. Max. memory is 16.1GB. [2021-08-30 17:13:05,719 INFO L158 Benchmark]: TraceAbstraction took 425898.63ms. Allocated memory was 100.7MB in the beginning and 325.1MB in the end (delta: 224.4MB). Free memory was 73.9MB in the beginning and 255.0MB in the end (delta: -181.1MB). Peak memory consumption was 41.6MB. Max. memory is 16.1GB. [2021-08-30 17:13:05,719 INFO L158 Benchmark]: Witness Printer took 31.27ms. Allocated memory is still 325.1MB. Free memory was 255.0MB in the beginning and 251.9MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-30 17:13:05,720 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 71.3MB. Free memory is still 54.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 309.72ms. Allocated memory is still 71.3MB. Free memory was 53.0MB in the beginning and 48.9MB in the end (delta: 4.2MB). Peak memory consumption was 11.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 78.03ms. Allocated memory is still 71.3MB. Free memory was 48.9MB in the beginning and 46.0MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 450.06ms. Allocated memory was 71.3MB in the beginning and 100.7MB in the end (delta: 29.4MB). Free memory was 46.0MB in the beginning and 74.3MB in the end (delta: -28.4MB). Peak memory consumption was 17.8MB. Max. memory is 16.1GB. * TraceAbstraction took 425898.63ms. Allocated memory was 100.7MB in the beginning and 325.1MB in the end (delta: 224.4MB). Free memory was 73.9MB in the beginning and 255.0MB in the end (delta: -181.1MB). Peak memory consumption was 41.6MB. Max. memory is 16.1GB. * Witness Printer took 31.27ms. Allocated memory is still 325.1MB. Free memory was 255.0MB in the beginning and 251.9MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 552]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L539] struct item *list = ((void *)0); VAL [list={3:0}] [L541] CALL append(&list) VAL [plist={3:0}] [L530] struct item *item = malloc(sizeof *item); [L531] EXPR \read(**plist) VAL [\read(**plist)={0:0}, item={-4:0}, plist={3:0}, plist={3:0}] [L531] item->next = *plist VAL [\read(**plist)={0:0}, item={-4:0}, plist={3:0}, plist={3:0}] [L532] EXPR item->next VAL [item={-4:0}, item->next={0:0}, plist={3:0}, plist={3:0}] [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={-3:0}, item={-4:0}, item->next={0:0}, malloc(sizeof *item)={-3:0}, plist={3:0}, plist={3:0}] [L532-L534] item->data = (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={-3:0}, item={-4:0}, item->next={0:0}, malloc(sizeof *item)={-3:0}, plist={3:0}, plist={3:0}] [L535] *plist = item VAL [item={-4:0}, plist={3:0}, plist={3:0}] [L541] RET append(&list) VAL [list={3:0}] [L542] COND TRUE __VERIFIER_nondet_int() [L541] CALL append(&list) VAL [plist={3:0}] [L530] struct item *item = malloc(sizeof *item); [L531] EXPR \read(**plist) VAL [\read(**plist)={-4:0}, item={-2:0}, plist={3:0}, plist={3:0}] [L531] item->next = *plist VAL [\read(**plist)={-4:0}, item={-2:0}, plist={3:0}, plist={3:0}] [L532] EXPR item->next VAL [item={-2:0}, item->next={-4:0}, plist={3:0}, plist={3:0}] [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) VAL [item={-2:0}, item->next={-4:0}, plist={3:0}, plist={3:0}] [L533] EXPR item->next VAL [item={-2:0}, item->next={-4:0}, item->next={-4:0}, plist={3:0}, plist={3:0}] [L533] EXPR item->next->data VAL [item={-2:0}, item->next={-4:0}, item->next={-4:0}, item->next->data={-3:0}, plist={3:0}, plist={3:0}] [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={-3:0}, item={-2:0}, item->next={-4:0}, item->next={-4:0}, item->next->data={-3:0}, plist={3:0}, plist={3:0}] [L532-L534] item->data = (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={-3:0}, item={-2:0}, item->next={-4:0}, item->next={-4:0}, item->next->data={-3:0}, plist={3:0}, plist={3:0}] [L535] *plist = item VAL [item={-2:0}, plist={3:0}, plist={3:0}] [L541] RET append(&list) VAL [list={3:0}] [L542] COND FALSE !(__VERIFIER_nondet_int()) [L543] \read(*list) VAL [\read(*list)={-2:0}, list={3:0}] [L543] COND TRUE \read(*list) [L544] EXPR \read(*list) VAL [\read(*list)={-2:0}, list={3:0}] [L544] EXPR list->next VAL [\read(*list)={-2:0}, list={3:0}, list->next={-4:0}] [L544] struct item *next = list->next; [L545] EXPR \read(*list) VAL [\read(*list)={-2:0}, list={3:0}, next={-4:0}] [L545] EXPR list->data VAL [\read(*list)={-2:0}, list={3:0}, list->data={-3:0}, next={-4:0}] [L545] free(list->data) VAL [\read(*list)={-2:0}, list={3:0}, list->data={-3:0}, next={-4:0}] [L545] free(list->data) VAL [\read(*list)={-2:0}, list={3:0}, list->data={-3:0}, next={-4:0}] [L545] free(list->data) [L546] EXPR \read(*list) VAL [\read(*list)={-2:0}, list={3:0}, next={-4:0}] [L546] free(list) VAL [\read(*list)={-2:0}, list={3:0}, next={-4:0}] [L546] free(list) VAL [\read(*list)={-2:0}, list={3:0}, next={-4:0}] [L546] free(list) [L547] list = next VAL [list={3:0}, next={-4:0}] [L549] \read(*list) VAL [\read(*list)={-4:0}, list={3:0}, next={-4:0}] [L549] COND TRUE \read(*list) [L550] EXPR \read(*list) VAL [\read(*list)={-4:0}, list={3:0}, next={-4:0}] [L550] EXPR list->next VAL [\read(*list)={-4:0}, list={3:0}, list->next={0:0}, next={-4:0}] [L550] struct item *next = list->next; [L551] COND TRUE !next VAL [list={3:0}, next={0:0}, next={-4:0}] [L552] EXPR \read(*list) VAL [\read(*list)={-4:0}, list={3:0}, next={0:0}, next={-4:0}] [L552] EXPR list->data VAL [\read(*list)={-4:0}, list={3:0}, list->data={-3:0}, next={-4:0}, next={0:0}] [L552] free(list->data) VAL [\read(*list)={-4:0}, list={3:0}, list->data={-3:0}, next={-4:0}, next={0:0}] [L552] free(list->data) VAL [\read(*list)={-4:0}, list={3:0}, list->data={-3:0}, next={0:0}, next={-4:0}] [L552] free(list->data) VAL [\read(*list)={-4:0}, list={3:0}, list->data={-3:0}, next={-4:0}, next={0:0}] - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 132 locations, 55 error locations. Started 1 CEGAR loops. OverallTime: 425831.62ms, OverallIterations: 45, TraceHistogramMax: 3, EmptinessCheckTime: 24.40ms, AutomataDifference: 193707.82ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 7.26ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3221 SdHoareTripleChecker+Valid, 19355.37ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3218 mSDsluCounter, 1537 SdHoareTripleChecker+Invalid, 16444.62ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2619 IncrementalHoareTripleChecker+Unchecked, 17541 mSDsCounter, 949 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 41976 IncrementalHoareTripleChecker+Invalid, 45544 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 949 mSolverCounterUnsat, 227 mSDtfsCounter, 41976 mSolverCounterSat, 145.77ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2443 GetRequests, 1051 SyntacticMatches, 19 SemanticMatches, 1373 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17293 ImplicationChecksByTransitivity, 321386.27ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=128occurred in iteration=25, InterpolantAutomatonStates: 725, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 150.75ms AutomataMinimizationTime, 44 MinimizatonAttempts, 243 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 212.07ms SsaConstructionTime, 858.12ms SatisfiabilityAnalysisTime, 156692.24ms InterpolantComputationTime, 2501 NumberOfCodeBlocks, 2501 NumberOfCodeBlocksAsserted, 61 NumberOfCheckSat, 2499 ConstructedInterpolants, 140 QuantifiedInterpolants, 60154 SizeOfPredicates, 383 NumberOfNonLiveVariables, 4996 ConjunctsInSsa, 1087 ConjunctsInUnsatCore, 62 InterpolantComputations, 27 PerfectInterpolantSequences, 231/566 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-30 17:13:05,940 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-08-30 17:13:06,013 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 137 Received shutdown request...