./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8d31f386 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/list-ext-properties/960521-1_1-1.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 978f701fee046cd9a3f43bfb12d114d1876d2f10 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Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.multireach-323-8d31f38 [2021-07-06 09:56:59,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-06 09:56:59,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-06 09:56:59,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-06 09:56:59,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-06 09:56:59,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-06 09:56:59,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-06 09:56:59,366 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-06 09:56:59,368 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-06 09:56:59,371 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-06 09:56:59,372 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-06 09:56:59,373 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-06 09:56:59,373 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-06 09:56:59,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-06 09:56:59,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-06 09:56:59,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-06 09:56:59,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-06 09:56:59,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-06 09:56:59,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-06 09:56:59,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-06 09:56:59,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-06 09:56:59,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-06 09:56:59,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-06 09:56:59,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-06 09:56:59,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-06 09:56:59,394 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-06 09:56:59,394 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-06 09:56:59,395 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-06 09:56:59,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-06 09:56:59,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-06 09:56:59,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-06 09:56:59,397 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-06 09:56:59,398 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-06 09:56:59,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-06 09:56:59,399 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-06 09:56:59,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-06 09:56:59,400 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-06 09:56:59,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-06 09:56:59,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-06 09:56:59,401 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-06 09:56:59,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-06 09:56:59,405 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-07-06 09:56:59,436 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-06 09:56:59,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-06 09:56:59,438 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-06 09:56:59,439 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-06 09:56:59,439 INFO L138 SettingsManager]: * Use SBE=true [2021-07-06 09:56:59,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-06 09:56:59,439 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-06 09:56:59,439 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-07-06 09:56:59,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-06 09:56:59,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-06 09:56:59,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-06 09:56:59,441 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-07-06 09:56:59,441 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-07-06 09:56:59,441 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-07-06 09:56:59,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-06 09:56:59,441 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-07-06 09:56:59,441 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-06 09:56:59,442 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-06 09:56:59,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-06 09:56:59,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-06 09:56:59,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-06 09:56:59,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-06 09:56:59,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-06 09:56:59,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-06 09:56:59,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-06 09:56:59,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-06 09:56:59,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-06 09:56:59,443 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 978f701fee046cd9a3f43bfb12d114d1876d2f10 [2021-07-06 09:56:59,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-06 09:56:59,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-06 09:56:59,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-06 09:56:59,744 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-06 09:56:59,745 INFO L275 PluginConnector]: CDTParser initialized [2021-07-06 09:56:59,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2021-07-06 09:56:59,788 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57a2c97fd/395ff46d81144ce79e0dd7c438816492/FLAGe60016b36 [2021-07-06 09:57:00,168 INFO L306 CDTParser]: Found 1 translation units. [2021-07-06 09:57:00,169 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2021-07-06 09:57:00,180 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57a2c97fd/395ff46d81144ce79e0dd7c438816492/FLAGe60016b36 [2021-07-06 09:57:00,542 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57a2c97fd/395ff46d81144ce79e0dd7c438816492 [2021-07-06 09:57:00,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-06 09:57:00,546 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-06 09:57:00,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-06 09:57:00,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-06 09:57:00,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-06 09:57:00,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.07 09:57:00" (1/1) ... [2021-07-06 09:57:00,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@317b4ad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 09:57:00, skipping insertion in model container [2021-07-06 09:57:00,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.07 09:57:00" (1/1) ... [2021-07-06 09:57:00,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-06 09:57:00,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-06 09:57:00,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-06 09:57:00,849 INFO L203 MainTranslator]: Completed pre-run [2021-07-06 09:57:00,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-06 09:57:00,919 INFO L208 MainTranslator]: Completed translation [2021-07-06 09:57:00,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 09:57:00 WrapperNode [2021-07-06 09:57:00,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-06 09:57:00,921 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-06 09:57:00,921 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-06 09:57:00,921 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-06 09:57:00,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 09:57:00" (1/1) ... [2021-07-06 09:57:00,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 09:57:00" (1/1) ... [2021-07-06 09:57:00,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 09:57:00" (1/1) ... [2021-07-06 09:57:00,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 09:57:00" (1/1) ... [2021-07-06 09:57:00,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 09:57:00" (1/1) ... [2021-07-06 09:57:00,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 09:57:00" (1/1) ... [2021-07-06 09:57:00,985 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 09:57:00" (1/1) ... [2021-07-06 09:57:00,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-06 09:57:00,993 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-06 09:57:00,993 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-06 09:57:00,994 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-06 09:57:00,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 09:57:00" (1/1) ... [2021-07-06 09:57:00,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-06 09:57:01,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-06 09:57:01,050 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) [2021-07-06 09:57:01,116 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 [2021-07-06 09:57:01,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-07-06 09:57:01,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-06 09:57:01,148 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-07-06 09:57:01,149 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-07-06 09:57:01,149 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-07-06 09:57:01,149 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-07-06 09:57:01,149 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-07-06 09:57:01,149 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-07-06 09:57:01,150 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-07-06 09:57:01,150 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-07-06 09:57:01,150 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-07-06 09:57:01,150 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-07-06 09:57:01,150 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-07-06 09:57:01,151 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-07-06 09:57:01,151 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-07-06 09:57:01,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-06 09:57:01,152 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-07-06 09:57:01,152 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-07-06 09:57:01,152 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-07-06 09:57:01,152 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-07-06 09:57:01,152 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-07-06 09:57:01,152 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-07-06 09:57:01,155 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-07-06 09:57:01,155 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-07-06 09:57:01,155 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-07-06 09:57:01,155 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-07-06 09:57:01,155 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-07-06 09:57:01,156 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-07-06 09:57:01,156 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-07-06 09:57:01,156 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-07-06 09:57:01,156 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-07-06 09:57:01,156 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-07-06 09:57:01,156 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-07-06 09:57:01,156 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-07-06 09:57:01,156 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-07-06 09:57:01,156 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-07-06 09:57:01,157 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-07-06 09:57:01,157 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-07-06 09:57:01,157 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-07-06 09:57:01,157 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-07-06 09:57:01,157 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-07-06 09:57:01,157 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-07-06 09:57:01,157 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-07-06 09:57:01,157 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-07-06 09:57:01,157 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-07-06 09:57:01,158 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-07-06 09:57:01,158 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-07-06 09:57:01,158 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-07-06 09:57:01,158 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-07-06 09:57:01,158 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-07-06 09:57:01,158 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-07-06 09:57:01,159 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-07-06 09:57:01,159 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-07-06 09:57:01,159 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-07-06 09:57:01,160 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-07-06 09:57:01,160 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-07-06 09:57:01,160 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-07-06 09:57:01,160 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-07-06 09:57:01,160 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-07-06 09:57:01,160 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-07-06 09:57:01,160 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-07-06 09:57:01,161 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-07-06 09:57:01,161 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-07-06 09:57:01,161 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-07-06 09:57:01,161 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-07-06 09:57:01,161 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-07-06 09:57:01,161 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-07-06 09:57:01,161 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-07-06 09:57:01,161 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-07-06 09:57:01,162 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-07-06 09:57:01,162 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-07-06 09:57:01,163 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-07-06 09:57:01,163 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-07-06 09:57:01,164 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-07-06 09:57:01,164 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-07-06 09:57:01,164 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-07-06 09:57:01,164 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-07-06 09:57:01,164 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-07-06 09:57:01,164 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-07-06 09:57:01,164 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-07-06 09:57:01,164 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-07-06 09:57:01,164 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-07-06 09:57:01,165 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-07-06 09:57:01,165 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-07-06 09:57:01,165 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-07-06 09:57:01,165 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-07-06 09:57:01,166 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-07-06 09:57:01,166 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-07-06 09:57:01,166 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-07-06 09:57:01,166 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-07-06 09:57:01,166 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-07-06 09:57:01,166 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-07-06 09:57:01,166 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-07-06 09:57:01,167 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-07-06 09:57:01,167 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-07-06 09:57:01,167 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-07-06 09:57:01,167 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-07-06 09:57:01,167 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-07-06 09:57:01,167 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-07-06 09:57:01,167 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-07-06 09:57:01,167 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-07-06 09:57:01,167 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-07-06 09:57:01,167 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-07-06 09:57:01,168 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-07-06 09:57:01,168 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-07-06 09:57:01,168 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-07-06 09:57:01,168 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-07-06 09:57:01,168 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-07-06 09:57:01,168 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-07-06 09:57:01,168 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-07-06 09:57:01,169 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-07-06 09:57:01,169 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-07-06 09:57:01,169 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-07-06 09:57:01,169 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-07-06 09:57:01,169 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-07-06 09:57:01,169 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-07-06 09:57:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-07-06 09:57:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-07-06 09:57:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-07-06 09:57:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-07-06 09:57:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-07-06 09:57:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-07-06 09:57:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-07-06 09:57:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-07-06 09:57:01,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-06 09:57:01,171 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-07-06 09:57:01,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-07-06 09:57:01,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-06 09:57:01,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-06 09:57:01,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-07-06 09:57:01,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-06 09:57:01,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-06 09:57:01,650 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-06 09:57:01,650 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-07-06 09:57:01,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 09:57:01 BoogieIcfgContainer [2021-07-06 09:57:01,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-06 09:57:01,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-06 09:57:01,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-06 09:57:01,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-06 09:57:01,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.07 09:57:00" (1/3) ... [2021-07-06 09:57:01,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5705c433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.07 09:57:01, skipping insertion in model container [2021-07-06 09:57:01,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 09:57:00" (2/3) ... [2021-07-06 09:57:01,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5705c433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.07 09:57:01, skipping insertion in model container [2021-07-06 09:57:01,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 09:57:01" (3/3) ... [2021-07-06 09:57:01,657 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1_1-1.i [2021-07-06 09:57:01,662 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-06 09:57:01,662 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-07-06 09:57:01,690 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr0REQUIRES_VIOLATION ======== [2021-07-06 09:57:01,694 INFO L329 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, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 09:57:01,695 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 09:57:01,706 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 55 states have internal predecessors, (62), 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) [2021-07-06 09:57:01,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-07-06 09:57:01,710 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 09:57:01,711 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 09:57:01,711 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr0REQUIRES_VIOLATION] === [2021-07-06 09:57:01,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 09:57:01,715 INFO L82 PathProgramCache]: Analyzing trace with hash -2038959102, now seen corresponding path program 1 times [2021-07-06 09:57:01,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 09:57:01,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245064036] [2021-07-06 09:57:01,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:57:01,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 09:57:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:01,835 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:01,836 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:01,837 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:01,837 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:01,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 09:57:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:01,888 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:01,888 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 09:57:01,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 09:57:01,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245064036] [2021-07-06 09:57:01,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245064036] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 09:57:01,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 09:57:01,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 09:57:01,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903952571] [2021-07-06 09:57:01,895 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-06 09:57:01,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 09:57:01,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-06 09:57:01,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-06 09:57:01,906 INFO L87 Difference]: Start difference. First operand has 62 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 55 states have internal predecessors, (62), 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 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-07-06 09:57:02,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 09:57:02,003 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-07-06 09:57:02,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-06 09:57:02,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 9 [2021-07-06 09:57:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 09:57:02,009 INFO L225 Difference]: With dead ends: 62 [2021-07-06 09:57:02,010 INFO L226 Difference]: Without dead ends: 11 [2021-07-06 09:57:02,011 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-06 09:57:02,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-07-06 09:57:02,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-07-06 09:57:02,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 2 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) [2021-07-06 09:57:02,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-07-06 09:57:02,028 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2021-07-06 09:57:02,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 09:57:02,029 INFO L442 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-07-06 09:57:02,029 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-07-06 09:57:02,029 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-07-06 09:57:02,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-06 09:57:02,029 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 09:57:02,030 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 09:57:02,030 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-06 09:57:02,030 INFO L374 AbstractCegarLoop]: === Iteration 2 === [mainErr0REQUIRES_VIOLATION] === [2021-07-06 09:57:02,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 09:57:02,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1216562944, now seen corresponding path program 1 times [2021-07-06 09:57:02,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 09:57:02,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474864057] [2021-07-06 09:57:02,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:57:02,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 09:57:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:02,100 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,101 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,102 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,102 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 09:57:02,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 09:57:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:02,158 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,158 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 09:57:02,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 09:57:02,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474864057] [2021-07-06 09:57:02,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474864057] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 09:57:02,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 09:57:02,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 09:57:02,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191168829] [2021-07-06 09:57:02,161 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 09:57:02,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 09:57:02,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 09:57:02,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 09:57:02,165 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-07-06 09:57:02,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 09:57:02,196 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2021-07-06 09:57:02,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-06 09:57:02,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 10 [2021-07-06 09:57:02,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 09:57:02,197 INFO L225 Difference]: With dead ends: 10 [2021-07-06 09:57:02,197 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 09:57:02,198 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 09:57:02,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 09:57:02,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 09:57:02,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-06 09:57:02,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 09:57:02,198 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2021-07-06 09:57:02,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 09:57:02,198 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 09:57:02,199 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-07-06 09:57:02,199 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 09:57:02,199 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 09:57:02,201 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-06 09:57:02,201 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 09:57:02,204 INFO L303 ceAbstractionStarter]: Result for error location mainErr0REQUIRES_VIOLATION was SAFE (1/21) [2021-07-06 09:57:02,206 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr1REQUIRES_VIOLATION ======== [2021-07-06 09:57:02,206 INFO L329 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, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 09:57:02,206 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 09:57:02,208 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 55 states have internal predecessors, (62), 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) [2021-07-06 09:57:02,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-07-06 09:57:02,209 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 09:57:02,209 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 09:57:02,209 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr1REQUIRES_VIOLATION] === [2021-07-06 09:57:02,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 09:57:02,210 INFO L82 PathProgramCache]: Analyzing trace with hash -2038959101, now seen corresponding path program 1 times [2021-07-06 09:57:02,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 09:57:02,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672682579] [2021-07-06 09:57:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:57:02,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 09:57:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:02,223 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,224 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,224 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,224 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 09:57:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:02,249 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,250 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 09:57:02,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 09:57:02,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672682579] [2021-07-06 09:57:02,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672682579] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 09:57:02,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 09:57:02,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-06 09:57:02,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183083834] [2021-07-06 09:57:02,251 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-06 09:57:02,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 09:57:02,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-06 09:57:02,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-06 09:57:02,252 INFO L87 Difference]: Start difference. First operand has 62 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 55 states have internal predecessors, (62), 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 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-07-06 09:57:02,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 09:57:02,316 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-07-06 09:57:02,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-06 09:57:02,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 9 [2021-07-06 09:57:02,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 09:57:02,317 INFO L225 Difference]: With dead ends: 62 [2021-07-06 09:57:02,317 INFO L226 Difference]: Without dead ends: 11 [2021-07-06 09:57:02,318 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-06 09:57:02,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-07-06 09:57:02,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-07-06 09:57:02,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 2 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) [2021-07-06 09:57:02,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-07-06 09:57:02,319 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2021-07-06 09:57:02,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 09:57:02,320 INFO L442 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-07-06 09:57:02,320 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-07-06 09:57:02,320 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-07-06 09:57:02,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-06 09:57:02,320 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 09:57:02,320 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 09:57:02,320 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-06 09:57:02,321 INFO L374 AbstractCegarLoop]: === Iteration 2 === [mainErr1REQUIRES_VIOLATION] === [2021-07-06 09:57:02,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 09:57:02,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1216562945, now seen corresponding path program 1 times [2021-07-06 09:57:02,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 09:57:02,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448065621] [2021-07-06 09:57:02,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:57:02,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 09:57:02,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:02,345 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,345 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,346 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,346 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 09:57:02,351 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,351 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-07-06 09:57:02,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 09:57:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:02,381 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,382 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 09:57:02,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 09:57:02,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448065621] [2021-07-06 09:57:02,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448065621] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 09:57:02,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 09:57:02,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 09:57:02,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394950785] [2021-07-06 09:57:02,383 INFO L425 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-06 09:57:02,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 09:57:02,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-06 09:57:02,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-06 09:57:02,384 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-07-06 09:57:02,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 09:57:02,407 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-07-06 09:57:02,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-06 09:57:02,408 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 10 [2021-07-06 09:57:02,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 09:57:02,415 INFO L225 Difference]: With dead ends: 15 [2021-07-06 09:57:02,415 INFO L226 Difference]: Without dead ends: 13 [2021-07-06 09:57:02,416 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-06 09:57:02,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-07-06 09:57:02,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-07-06 09:57:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 2 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) [2021-07-06 09:57:02,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-07-06 09:57:02,418 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2021-07-06 09:57:02,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 09:57:02,418 INFO L442 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-07-06 09:57:02,418 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-07-06 09:57:02,419 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-07-06 09:57:02,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-06 09:57:02,419 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 09:57:02,419 INFO L525 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 09:57:02,419 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-06 09:57:02,419 INFO L374 AbstractCegarLoop]: === Iteration 3 === [mainErr1REQUIRES_VIOLATION] === [2021-07-06 09:57:02,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 09:57:02,420 INFO L82 PathProgramCache]: Analyzing trace with hash 887456838, now seen corresponding path program 1 times [2021-07-06 09:57:02,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 09:57:02,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66667385] [2021-07-06 09:57:02,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:57:02,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 09:57:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:02,439 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,440 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,440 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,441 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 09:57:02,443 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,444 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:02,452 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,453 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-07-06 09:57:02,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 09:57:02,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:02,496 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,497 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 09:57:02,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 09:57:02,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66667385] [2021-07-06 09:57:02,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66667385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-06 09:57:02,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756825290] [2021-07-06 09:57:02,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:57:02,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-06 09:57:02,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-06 09:57:02,519 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) [2021-07-06 09:57:02,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-07-06 09:57:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:02,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-06 09:57:02,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-06 09:57:02,665 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,665 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,666 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,666 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,666 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,667 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,667 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,667 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,668 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,668 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,669 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,669 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,669 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,670 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,670 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,670 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,670 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,671 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,671 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,671 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,672 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,672 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,672 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,672 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,673 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,673 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,674 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,674 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,674 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,674 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,675 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,675 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,676 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,676 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,676 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,676 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,677 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,677 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,677 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,678 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:02,678 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,678 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:02,679 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,679 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:02,679 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,680 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:02,680 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,680 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:02,686 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,686 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:02,686 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,687 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:02,687 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,687 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:02,688 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,688 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:02,691 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-06 09:57:02,701 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,702 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-07-06 09:57:02,702 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-07-06 09:57:02,703 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-06 09:57:02,704 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,705 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-07-06 09:57:02,705 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-07-06 09:57:02,706 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,711 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:02,712 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,712 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:02,712 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,713 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:02,713 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,713 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:02,714 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,714 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:02,714 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,714 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:02,715 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,715 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:02,715 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:02,716 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:02,717 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,717 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:02,718 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-06 09:57:02,719 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,719 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-07-06 09:57:02,720 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-07-06 09:57:02,721 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-06 09:57:02,723 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,723 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-07-06 09:57:02,724 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-07-06 09:57:02,725 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-06 09:57:02,729 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-06 09:57:02,730 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,730 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-07-06 09:57:02,730 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-07-06 09:57:02,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-06 09:57:02,731 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,732 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-07-06 09:57:02,732 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-07-06 09:57:02,761 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-07-06 09:57:02,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 15 [2021-07-06 09:57:02,762 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,762 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-07-06 09:57:02,763 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,763 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-07-06 09:57:02,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-06 09:57:02,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,770 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-06 09:57:02,775 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,775 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-07-06 09:57:02,776 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-07-06 09:57:02,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-06 09:57:02,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:29 [2021-07-06 09:57:02,777 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-06 09:57:02,778 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,778 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-07-06 09:57:02,779 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-07-06 09:57:02,780 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-06 09:57:02,780 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:02,781 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-07-06 09:57:02,781 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-07-06 09:57:02,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 09:57:02,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756825290] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 09:57:02,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-06 09:57:02,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-07-06 09:57:02,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79061914] [2021-07-06 09:57:02,810 INFO L425 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-06 09:57:02,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 09:57:02,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-06 09:57:02,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-06 09:57:02,811 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:57:02,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 09:57:02,828 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2021-07-06 09:57:02,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-06 09:57:02,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 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 12 [2021-07-06 09:57:02,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 09:57:02,828 INFO L225 Difference]: With dead ends: 12 [2021-07-06 09:57:02,828 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 09:57:02,829 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-06 09:57:02,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 09:57:02,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 09:57:02,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-06 09:57:02,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 09:57:02,829 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2021-07-06 09:57:02,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 09:57:02,830 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 09:57:02,830 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-07-06 09:57:02,830 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 09:57:02,830 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 09:57:02,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-07-06 09:57:03,048 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-06 09:57:03,048 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 09:57:03,048 INFO L303 ceAbstractionStarter]: Result for error location mainErr1REQUIRES_VIOLATION was SAFE (2/21) [2021-07-06 09:57:03,049 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr2REQUIRES_VIOLATION ======== [2021-07-06 09:57:03,049 INFO L329 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, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 09:57:03,050 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 09:57:03,052 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 55 states have internal predecessors, (62), 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) [2021-07-06 09:57:03,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-06 09:57:03,052 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 09:57:03,052 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 09:57:03,053 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION] === [2021-07-06 09:57:03,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 09:57:03,053 INFO L82 PathProgramCache]: Analyzing trace with hash -27341364, now seen corresponding path program 1 times [2021-07-06 09:57:03,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 09:57:03,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611137963] [2021-07-06 09:57:03,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:57:03,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 09:57:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:03,063 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:03,063 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:03,064 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:03,064 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:03,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 09:57:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:03,100 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:03,100 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:03,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-07-06 09:57:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:03,108 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:03,109 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:03,109 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:03,109 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:03,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 09:57:03,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 09:57:03,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611137963] [2021-07-06 09:57:03,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611137963] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 09:57:03,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 09:57:03,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 09:57:03,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383317530] [2021-07-06 09:57:03,112 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 09:57:03,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 09:57:03,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 09:57:03,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 09:57:03,114 INFO L87 Difference]: Start difference. First operand has 62 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 55 states have internal predecessors, (62), 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 4 states, 4 states have (on average 3.25) internal successors, (13), 2 states have internal predecessors, (13), 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) [2021-07-06 09:57:03,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 09:57:03,259 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2021-07-06 09:57:03,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-06 09:57:03,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 2 states have internal predecessors, (13), 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 18 [2021-07-06 09:57:03,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 09:57:03,262 INFO L225 Difference]: With dead ends: 73 [2021-07-06 09:57:03,262 INFO L226 Difference]: Without dead ends: 31 [2021-07-06 09:57:03,263 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-06 09:57:03,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-07-06 09:57:03,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2021-07-06 09:57:03,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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) [2021-07-06 09:57:03,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-07-06 09:57:03,269 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2021-07-06 09:57:03,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 09:57:03,270 INFO L442 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-07-06 09:57:03,270 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 2 states have internal predecessors, (13), 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) [2021-07-06 09:57:03,270 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-07-06 09:57:03,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-06 09:57:03,271 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 09:57:03,271 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 09:57:03,271 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-06 09:57:03,271 INFO L374 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION] === [2021-07-06 09:57:03,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 09:57:03,271 INFO L82 PathProgramCache]: Analyzing trace with hash 812532640, now seen corresponding path program 1 times [2021-07-06 09:57:03,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 09:57:03,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283391081] [2021-07-06 09:57:03,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:57:03,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 09:57:03,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:03,298 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:03,299 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:03,299 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:03,301 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 09:57:03,303 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:03,304 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:03,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 09:57:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:03,328 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:03,328 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:03,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-07-06 09:57:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:03,336 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:03,337 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:03,342 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:03,342 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:03,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 09:57:03,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 09:57:03,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283391081] [2021-07-06 09:57:03,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283391081] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 09:57:03,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 09:57:03,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-06 09:57:03,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089790103] [2021-07-06 09:57:03,349 INFO L425 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-06 09:57:03,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 09:57:03,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-06 09:57:03,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-06 09:57:03,349 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-07-06 09:57:03,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 09:57:03,732 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2021-07-06 09:57:03,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-06 09:57:03,733 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 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 19 [2021-07-06 09:57:03,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 09:57:03,734 INFO L225 Difference]: With dead ends: 67 [2021-07-06 09:57:03,734 INFO L226 Difference]: Without dead ends: 67 [2021-07-06 09:57:03,734 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 306.2ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-07-06 09:57:03,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-07-06 09:57:03,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 41. [2021-07-06 09:57:03,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-07-06 09:57:03,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-07-06 09:57:03,738 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 19 [2021-07-06 09:57:03,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 09:57:03,738 INFO L442 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-07-06 09:57:03,738 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-07-06 09:57:03,738 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-07-06 09:57:03,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-06 09:57:03,739 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 09:57:03,739 INFO L525 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 09:57:03,739 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-06 09:57:03,739 INFO L374 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION] === [2021-07-06 09:57:03,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 09:57:03,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1779180539, now seen corresponding path program 1 times [2021-07-06 09:57:03,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 09:57:03,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52086403] [2021-07-06 09:57:03,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:57:03,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 09:57:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:03,752 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:03,752 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:03,753 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:03,754 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-07-06 09:57:03,758 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:03,758 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 09:57:03,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 09:57:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:03,783 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:03,783 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:03,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-07-06 09:57:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:03,790 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:03,790 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-06 09:57:03,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 09:57:03,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52086403] [2021-07-06 09:57:03,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52086403] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 09:57:03,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 09:57:03,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-06 09:57:03,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855927468] [2021-07-06 09:57:03,791 INFO L425 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-06 09:57:03,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 09:57:03,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-06 09:57:03,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-06 09:57:03,792 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-07-06 09:57:03,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 09:57:03,917 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2021-07-06 09:57:03,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-06 09:57:03,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2021-07-06 09:57:03,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 09:57:03,918 INFO L225 Difference]: With dead ends: 48 [2021-07-06 09:57:03,918 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 09:57:03,918 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-06 09:57:03,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 09:57:03,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 09:57:03,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-06 09:57:03,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 09:57:03,919 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-07-06 09:57:03,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 09:57:03,919 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 09:57:03,919 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-07-06 09:57:03,919 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 09:57:03,919 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 09:57:03,920 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-06 09:57:03,920 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 09:57:03,920 INFO L303 ceAbstractionStarter]: Result for error location mainErr2REQUIRES_VIOLATION was SAFE (3/21) [2021-07-06 09:57:03,921 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == mainErr3REQUIRES_VIOLATION ======== [2021-07-06 09:57:03,921 INFO L329 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, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 09:57:03,921 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 09:57:03,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 55 states have internal predecessors, (62), 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) [2021-07-06 09:57:03,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-06 09:57:03,923 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 09:57:03,923 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 09:57:03,923 INFO L374 AbstractCegarLoop]: === Iteration 1 === [mainErr3REQUIRES_VIOLATION] === [2021-07-06 09:57:03,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 09:57:03,923 INFO L82 PathProgramCache]: Analyzing trace with hash -27341363, now seen corresponding path program 1 times [2021-07-06 09:57:03,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 09:57:03,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579829306] [2021-07-06 09:57:03,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:57:03,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 09:57:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:03,931 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:03,931 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:03,932 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:03,932 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:03,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 09:57:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:03,952 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:03,952 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:03,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-07-06 09:57:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:03,957 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:03,958 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:03,958 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:03,958 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 09:57:03,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 09:57:03,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579829306] [2021-07-06 09:57:03,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579829306] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 09:57:03,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 09:57:03,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 09:57:03,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606068707] [2021-07-06 09:57:03,959 INFO L425 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-06 09:57:03,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 09:57:03,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-06 09:57:03,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-06 09:57:03,960 INFO L87 Difference]: Start difference. First operand has 62 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 55 states have internal predecessors, (62), 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 4 states, 4 states have (on average 3.25) internal successors, (13), 2 states have internal predecessors, (13), 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) [2021-07-06 09:57:04,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 09:57:04,058 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2021-07-06 09:57:04,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-06 09:57:04,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 2 states have internal predecessors, (13), 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 18 [2021-07-06 09:57:04,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 09:57:04,059 INFO L225 Difference]: With dead ends: 73 [2021-07-06 09:57:04,059 INFO L226 Difference]: Without dead ends: 31 [2021-07-06 09:57:04,059 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-06 09:57:04,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-07-06 09:57:04,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2021-07-06 09:57:04,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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) [2021-07-06 09:57:04,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-07-06 09:57:04,061 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2021-07-06 09:57:04,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 09:57:04,061 INFO L442 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-07-06 09:57:04,061 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 2 states have internal predecessors, (13), 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) [2021-07-06 09:57:04,061 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-07-06 09:57:04,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-06 09:57:04,062 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 09:57:04,062 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 09:57:04,062 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-06 09:57:04,062 INFO L374 AbstractCegarLoop]: === Iteration 2 === [mainErr3REQUIRES_VIOLATION] === [2021-07-06 09:57:04,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 09:57:04,063 INFO L82 PathProgramCache]: Analyzing trace with hash 812532641, now seen corresponding path program 1 times [2021-07-06 09:57:04,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 09:57:04,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805873283] [2021-07-06 09:57:04,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:57:04,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 09:57:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:04,074 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,074 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,075 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,075 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 09:57:04,077 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,077 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 09:57:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:04,099 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,099 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-07-06 09:57:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:04,106 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,106 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,110 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,111 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 09:57:04,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 09:57:04,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805873283] [2021-07-06 09:57:04,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805873283] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 09:57:04,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 09:57:04,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-06 09:57:04,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009366219] [2021-07-06 09:57:04,116 INFO L425 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-06 09:57:04,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 09:57:04,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-06 09:57:04,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-06 09:57:04,117 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-07-06 09:57:04,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 09:57:04,481 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2021-07-06 09:57:04,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-06 09:57:04,482 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 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 19 [2021-07-06 09:57:04,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 09:57:04,482 INFO L225 Difference]: With dead ends: 67 [2021-07-06 09:57:04,482 INFO L226 Difference]: Without dead ends: 67 [2021-07-06 09:57:04,483 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 296.3ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-07-06 09:57:04,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-07-06 09:57:04,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 41. [2021-07-06 09:57:04,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-07-06 09:57:04,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-07-06 09:57:04,487 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 19 [2021-07-06 09:57:04,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 09:57:04,488 INFO L442 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-07-06 09:57:04,488 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-07-06 09:57:04,488 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-07-06 09:57:04,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-06 09:57:04,488 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 09:57:04,489 INFO L525 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 09:57:04,489 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-06 09:57:04,489 INFO L374 AbstractCegarLoop]: === Iteration 3 === [mainErr3REQUIRES_VIOLATION] === [2021-07-06 09:57:04,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 09:57:04,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1779180540, now seen corresponding path program 1 times [2021-07-06 09:57:04,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 09:57:04,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769982156] [2021-07-06 09:57:04,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:57:04,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 09:57:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:04,501 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,502 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,502 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,502 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-07-06 09:57:04,505 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,505 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,507 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,508 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-07-06 09:57:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:04,539 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,540 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-07-06 09:57:04,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:04,547 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,547 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,552 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,553 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 09:57:04,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 09:57:04,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769982156] [2021-07-06 09:57:04,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769982156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-06 09:57:04,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142773541] [2021-07-06 09:57:04,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:57:04,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-06 09:57:04,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-06 09:57:04,560 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) [2021-07-06 09:57:04,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-07-06 09:57:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 09:57:04,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-06 09:57:04,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-06 09:57:04,660 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,660 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,661 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,661 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,661 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,661 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,662 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,662 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,662 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,663 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,663 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,663 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,663 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,664 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,664 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,664 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,664 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,665 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,665 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,665 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,665 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,666 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,666 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,666 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,667 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,667 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,667 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,667 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,668 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,668 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,668 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,668 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,669 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,669 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,669 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,670 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,670 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,670 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,670 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,671 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,671 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,671 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,671 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,672 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,672 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,672 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,672 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,673 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,679 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,679 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,679 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,680 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,680 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,680 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,680 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,681 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,681 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-06 09:57:04,682 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,683 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-07-06 09:57:04,683 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-07-06 09:57:04,684 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-06 09:57:04,684 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,685 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-07-06 09:57:04,685 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-07-06 09:57:04,686 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,686 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,687 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,687 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,687 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,687 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,688 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,688 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,688 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,688 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,689 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,689 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,689 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,689 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,690 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,690 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,690 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,690 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,691 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,691 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,691 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,691 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,692 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,692 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,692 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,692 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,693 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,693 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,693 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,693 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,694 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,694 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,694 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,694 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,695 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,695 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,695 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,695 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,696 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,696 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,696 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,696 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,697 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,697 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,697 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,697 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,698 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,698 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,698 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,698 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,699 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,699 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 09:57:04,699 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,700 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 09:57:04,700 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,700 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 09:57:04,701 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,701 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 09:57:04,701 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,701 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-06 09:57:04,709 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,710 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-07-06 09:57:04,710 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-06 09:57:04,711 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,712 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-07-06 09:57:04,712 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-07-06 09:57:04,713 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,714 INFO L147 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size 1 [2021-07-06 09:57:04,714 INFO L142 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size [2021-07-06 09:57:04,714 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,715 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,715 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,715 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,715 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,716 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,716 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,717 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,717 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,717 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,717 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,718 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,718 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,718 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,718 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,719 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,719 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,719 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,720 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,720 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,720 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,720 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,721 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,721 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 09:57:04,721 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 09:57:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 09:57:04,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142773541] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 09:57:04,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-06 09:57:04,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2021-07-06 09:57:04,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381498859] [2021-07-06 09:57:04,722 INFO L425 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-06 09:57:04,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 09:57:04,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-06 09:57:04,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-06 09:57:04,723 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-07-06 09:57:04,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 09:57:04,763 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-07-06 09:57:04,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-06 09:57:04,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 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 21 [2021-07-06 09:57:04,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 09:57:04,764 INFO L225 Difference]: With dead ends: 49 [2021-07-06 09:57:04,764 INFO L226 Difference]: Without dead ends: 49 [2021-07-06 09:57:04,765 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-06 09:57:04,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-07-06 09:57:04,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-07-06 09:57:04,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 36 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-07-06 09:57:04,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-07-06 09:57:04,767 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 21 [2021-07-06 09:57:04,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 09:57:04,767 INFO L442 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-07-06 09:57:04,768 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-07-06 09:57:04,768 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-07-06 09:57:04,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-06 09:57:04,768 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 09:57:04,768 INFO L525 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] [2021-07-06 09:57:04,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-07-06 09:57:04,985 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-06 09:57:04,986 INFO L374 AbstractCegarLoop]: === Iteration 4 === [mainErr3REQUIRES_VIOLATION] === [2021-07-06 09:57:04,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 09:57:04,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1762222076, now seen corresponding path program 1 times [2021-07-06 09:57:04,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 09:57:04,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031751353] [2021-07-06 09:57:04,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 09:57:04,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 09:57:05,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-06 09:57:05,023 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-06 09:57:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-06 09:57:05,038 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-06 09:57:05,058 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-06 09:57:05,059 INFO L639 BasicCegarLoop]: Counterexample is feasible [2021-07-06 09:57:05,059 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-06 09:57:05,065 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 09:57:05,066 INFO L303 ceAbstractionStarter]: Result for error location mainErr3REQUIRES_VIOLATION was UNSAFE (4/21) [2021-07-06 09:57:05,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.07 09:57:05 BoogieIcfgContainer [2021-07-06 09:57:05,091 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-06 09:57:05,092 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-07-06 09:57:05,092 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-07-06 09:57:05,092 INFO L275 PluginConnector]: Witness Printer initialized [2021-07-06 09:57:05,092 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 09:57:01" (3/4) ... [2021-07-06 09:57:05,093 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-07-06 09:57:05,131 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-07-06 09:57:05,131 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-07-06 09:57:05,131 INFO L168 Benchmark]: Toolchain (without parser) took 4585.20 ms. Allocated memory was 60.8 MB in the beginning and 138.4 MB in the end (delta: 77.6 MB). Free memory was 43.4 MB in the beginning and 115.7 MB in the end (delta: -72.3 MB). Peak memory consumption was 84.8 MB. Max. memory is 16.1 GB. [2021-07-06 09:57:05,132 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 50.3 MB. Free memory is still 30.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-07-06 09:57:05,132 INFO L168 Benchmark]: CACSL2BoogieTranslator took 371.52 ms. Allocated memory is still 60.8 MB. Free memory was 43.2 MB in the beginning and 31.0 MB in the end (delta: 12.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-07-06 09:57:05,132 INFO L168 Benchmark]: Boogie Preprocessor took 71.68 ms. Allocated memory is still 60.8 MB. Free memory was 31.0 MB in the beginning and 42.2 MB in the end (delta: -11.2 MB). Peak memory consumption was 2.9 MB. Max. memory is 16.1 GB. [2021-07-06 09:57:05,132 INFO L168 Benchmark]: RCFGBuilder took 658.14 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 42.2 MB in the beginning and 44.5 MB in the end (delta: -2.3 MB). Peak memory consumption was 19.0 MB. Max. memory is 16.1 GB. [2021-07-06 09:57:05,132 INFO L168 Benchmark]: TraceAbstraction took 3438.93 ms. Allocated memory was 75.5 MB in the beginning and 138.4 MB in the end (delta: 62.9 MB). Free memory was 44.1 MB in the beginning and 40.6 MB in the end (delta: 3.6 MB). Peak memory consumption was 67.1 MB. Max. memory is 16.1 GB. [2021-07-06 09:57:05,133 INFO L168 Benchmark]: Witness Printer took 39.27 ms. Allocated memory is still 138.4 MB. Free memory was 40.6 MB in the beginning and 115.7 MB in the end (delta: -75.1 MB). Peak memory consumption was 3.6 MB. Max. memory is 16.1 GB. [2021-07-06 09:57:05,133 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 50.3 MB. Free memory is still 30.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 371.52 ms. Allocated memory is still 60.8 MB. Free memory was 43.2 MB in the beginning and 31.0 MB in the end (delta: 12.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 71.68 ms. Allocated memory is still 60.8 MB. Free memory was 31.0 MB in the beginning and 42.2 MB in the end (delta: -11.2 MB). Peak memory consumption was 2.9 MB. Max. memory is 16.1 GB. * RCFGBuilder took 658.14 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 42.2 MB in the beginning and 44.5 MB in the end (delta: -2.3 MB). Peak memory consumption was 19.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3438.93 ms. Allocated memory was 75.5 MB in the beginning and 138.4 MB in the end (delta: 62.9 MB). Free memory was 44.1 MB in the beginning and 40.6 MB in the end (delta: 3.6 MB). Peak memory consumption was 67.1 MB. Max. memory is 16.1 GB. * Witness Printer took 39.27 ms. Allocated memory is still 138.4 MB. Free memory was 40.6 MB in the beginning and 115.7 MB in the end (delta: -75.1 MB). Peak memory consumption was 3.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 542]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 542]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 544]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - CounterExampleResult [Line: 544]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L523] int *a, *b; [L524] int n; VAL [\old(a)=53, \old(a)=56, \old(b)=50, \old(b)=57, \old(n)=55, a={0:0}, b={0:0}, n=0] [L536] n = 1 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={0:0}, b={0:0}, n=1] [L537] COND FALSE !(__VERIFIER_nondet_int() && n < 30) [L540] a = malloc(n * sizeof(*a)) [L541] b = malloc(n * sizeof(*b)) [L542] EXPR b++ VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-1:0}, b={-2:4}, b++={-2:0}, malloc(n * sizeof(*a))={-1:0}, malloc(n * sizeof(*b))={-2:0}, n=1] [L542] *b++ = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-1:0}, b={-2:4}, b++={-2:0}, malloc(n * sizeof(*a))={-1:0}, malloc(n * sizeof(*b))={-2:0}, n=1] [L543] CALL foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-1:0}, b={-2:4}, n=1] [L528] int i; [L529] i = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-1:0}, b={-2:4}, i=0, n=1] [L529] COND TRUE i < n VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-1:0}, b={-2:4}, i=0, n=1] [L530] a[i] = n VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-1:0}, b={-2:4}, i=0, n=1] [L529] i++ VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-1:0}, b={-2:4}, i=1, n=1] [L529] COND FALSE !(i < n) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-1:0}, b={-2:4}, i=1, n=1] [L531] i = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-1:0}, b={-2:4}, i=0, n=1] [L531] COND FALSE !(i < n - 1) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-1:0}, b={-2:4}, i=0, n=1] [L543] RET foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-1:0}, b={-2:4}, malloc(n * sizeof(*a))={-1:0}, malloc(n * sizeof(*b))={-2:0}, n=1] [L544] b[-2] - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0REQUIRES_VIOLATION CFG has 10 procedures, 80 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 515.4ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 8.2ms, AutomataDifference: 151.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 63 SDtfs, 15 SDslu, 13 SDs, 0 SdLazy, 63 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 76.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=0, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 9.8ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 9.6ms SsaConstructionTime, 53.6ms SatisfiabilityAnalysisTime, 175.0ms InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 99 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr1REQUIRES_VIOLATION CFG has 10 procedures, 80 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 842.7ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 1.6ms, AutomataDifference: 116.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 69 SDtfs, 19 SDslu, 29 SDs, 0 SdLazy, 85 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 64.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 127.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=0, InterpolantAutomatonStates: 13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3.9ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 9.5ms SsaConstructionTime, 31.9ms SatisfiabilityAnalysisTime, 303.8ms InterpolantComputationTime, 43 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 39 ConstructedInterpolants, 0 QuantifiedInterpolants, 215 SizeOfPredicates, 4 NumberOfNonLiveVariables, 151 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 2/4 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 - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr2REQUIRES_VIOLATION CFG has 10 procedures, 80 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 870.8ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 2.1ms, AutomataDifference: 662.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 85 SDtfs, 185 SDslu, 72 SDs, 0 SdLazy, 237 SolverSat, 54 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 200.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 461.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=0, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 11.0ms AutomataMinimizationTime, 3 MinimizatonAttempts, 33 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.5ms SsaConstructionTime, 11.2ms SatisfiabilityAnalysisTime, 158.5ms InterpolantComputationTime, 58 NumberOfCodeBlocks, 58 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 218 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 2/2 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 - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr3REQUIRES_VIOLATION CFG has 10 procedures, 80 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 1145.0ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 1.8ms, AutomataDifference: 508.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 95 SDtfs, 171 SDslu, 85 SDs, 0 SdLazy, 247 SolverSat, 49 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 155.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 392.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=0, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 8.5ms AutomataMinimizationTime, 3 MinimizatonAttempts, 39 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 21.6ms SsaConstructionTime, 46.2ms SatisfiabilityAnalysisTime, 202.5ms InterpolantComputationTime, 101 NumberOfCodeBlocks, 101 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 75 ConstructedInterpolants, 0 QuantifiedInterpolants, 270 SizeOfPredicates, 1 NumberOfNonLiveVariables, 168 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 2/4 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! [2021-07-06 09:57:05,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...