./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-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 7546d6e17020b89cf8d45870128d84e73c6cd245 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Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 07:34:17,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 07:34:17,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 07:34:17,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 07:34:17,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 07:34:17,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 07:34:17,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 07:34:17,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 07:34:17,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 07:34:17,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 07:34:17,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 07:34:17,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 07:34:17,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 07:34:17,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 07:34:17,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 07:34:17,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 07:34:17,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 07:34:17,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 07:34:17,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 07:34:17,573 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 07:34:17,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 07:34:17,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 07:34:17,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 07:34:17,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 07:34:17,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 07:34:17,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 07:34:17,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 07:34:17,589 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 07:34:17,590 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 07:34:17,590 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 07:34:17,591 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 07:34:17,591 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 07:34:17,592 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 07:34:17,593 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 07:34:17,593 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 07:34:17,594 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 07:34:17,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 07:34:17,594 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 07:34:17,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 07:34:17,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 07:34:17,596 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 07:34:17,597 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 07:34:17,627 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 07:34:17,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 07:34:17,628 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 07:34:17,628 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 07:34:17,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 07:34:17,630 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 07:34:17,630 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 07:34:17,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 07:34:17,630 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 07:34:17,630 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 07:34:17,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 07:34:17,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 07:34:17,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 07:34:17,631 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 07:34:17,631 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 07:34:17,632 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 07:34:17,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 07:34:17,638 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 07:34:17,638 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 07:34:17,638 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 07:34:17,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 07:34:17,639 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 07:34:17,639 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 07:34:17,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 07:34:17,639 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 07:34:17,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 07:34:17,639 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 07:34:17,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 07:34:17,640 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 07:34:17,640 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7546d6e17020b89cf8d45870128d84e73c6cd245 [2021-08-27 07:34:17,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 07:34:17,935 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 07:34:17,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 07:34:17,937 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 07:34:17,938 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 07:34:17,939 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i [2021-08-27 07:34:17,977 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a4000ffa/8089c17ed9f442a180adfc357e9347e0/FLAG6d16aec2f [2021-08-27 07:34:18,378 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 07:34:18,379 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i [2021-08-27 07:34:18,390 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a4000ffa/8089c17ed9f442a180adfc357e9347e0/FLAG6d16aec2f [2021-08-27 07:34:18,399 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a4000ffa/8089c17ed9f442a180adfc357e9347e0 [2021-08-27 07:34:18,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 07:34:18,402 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 07:34:18,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 07:34:18,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 07:34:18,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 07:34:18,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:34:18" (1/1) ... [2021-08-27 07:34:18,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e5a0dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:18, skipping insertion in model container [2021-08-27 07:34:18,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:34:18" (1/1) ... [2021-08-27 07:34:18,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 07:34:18,452 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 07:34:18,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 07:34:18,722 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 07:34:18,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 07:34:18,782 INFO L208 MainTranslator]: Completed translation [2021-08-27 07:34:18,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:18 WrapperNode [2021-08-27 07:34:18,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 07:34:18,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 07:34:18,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 07:34:18,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 07:34:18,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:18" (1/1) ... [2021-08-27 07:34:18,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:18" (1/1) ... [2021-08-27 07:34:18,817 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:18" (1/1) ... [2021-08-27 07:34:18,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:18" (1/1) ... [2021-08-27 07:34:18,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:18" (1/1) ... [2021-08-27 07:34:18,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:18" (1/1) ... [2021-08-27 07:34:18,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:18" (1/1) ... [2021-08-27 07:34:18,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 07:34:18,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 07:34:18,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 07:34:18,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 07:34:18,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:18" (1/1) ... [2021-08-27 07:34:18,863 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 07:34:18,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:34:18,911 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-27 07:34:18,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-27 07:34:19,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 07:34:19,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 07:34:19,006 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 07:34:19,006 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 07:34:19,006 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-08-27 07:34:19,006 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2021-08-27 07:34:19,007 INFO L138 BoogieDeclarations]: Found implementation of procedure _destroy_in_nondeterministic_order [2021-08-27 07:34:19,007 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 07:34:19,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 07:34:19,008 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 07:34:19,008 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 07:34:19,008 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 07:34:19,009 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 07:34:19,009 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 07:34:19,009 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 07:34:19,009 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 07:34:19,009 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 07:34:19,009 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 07:34:19,010 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 07:34:19,010 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 07:34:19,010 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 07:34:19,010 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 07:34:19,010 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 07:34:19,010 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 07:34:19,011 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 07:34:19,011 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 07:34:19,011 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 07:34:19,011 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 07:34:19,011 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 07:34:19,011 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 07:34:19,011 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 07:34:19,012 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 07:34:19,012 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 07:34:19,012 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 07:34:19,012 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 07:34:19,012 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 07:34:19,012 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 07:34:19,013 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 07:34:19,013 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 07:34:19,013 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 07:34:19,013 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 07:34:19,014 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 07:34:19,014 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 07:34:19,014 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 07:34:19,014 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 07:34:19,014 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 07:34:19,014 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 07:34:19,015 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 07:34:19,015 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 07:34:19,015 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 07:34:19,015 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 07:34:19,016 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 07:34:19,016 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 07:34:19,017 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 07:34:19,017 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 07:34:19,017 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 07:34:19,017 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 07:34:19,017 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 07:34:19,017 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 07:34:19,018 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 07:34:19,018 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 07:34:19,018 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 07:34:19,018 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 07:34:19,018 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 07:34:19,019 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 07:34:19,019 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-08-27 07:34:19,019 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 07:34:19,020 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 07:34:19,020 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 07:34:19,020 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 07:34:19,021 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 07:34:19,021 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 07:34:19,021 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 07:34:19,021 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 07:34:19,022 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 07:34:19,022 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 07:34:19,022 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 07:34:19,022 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 07:34:19,022 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 07:34:19,022 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 07:34:19,023 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 07:34:19,023 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 07:34:19,023 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 07:34:19,023 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 07:34:19,024 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 07:34:19,024 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 07:34:19,024 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 07:34:19,024 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 07:34:19,024 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 07:34:19,024 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 07:34:19,024 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 07:34:19,025 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 07:34:19,025 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 07:34:19,025 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 07:34:19,025 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 07:34:19,025 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 07:34:19,025 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 07:34:19,025 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 07:34:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 07:34:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 07:34:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 07:34:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 07:34:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 07:34:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 07:34:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 07:34:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 07:34:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 07:34:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 07:34:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 07:34:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 07:34:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 07:34:19,028 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 07:34:19,028 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 07:34:19,028 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 07:34:19,028 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-08-27 07:34:19,029 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2021-08-27 07:34:19,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 07:34:19,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-27 07:34:19,029 INFO L130 BoogieDeclarations]: Found specification of procedure _destroy_in_nondeterministic_order [2021-08-27 07:34:19,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-27 07:34:19,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 07:34:19,029 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 07:34:19,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 07:34:19,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 07:34:19,606 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-08-27 07:34:19,627 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 07:34:19,627 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-08-27 07:34:19,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:34:19 BoogieIcfgContainer [2021-08-27 07:34:19,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 07:34:19,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 07:34:19,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 07:34:19,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 07:34:19,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 07:34:18" (1/3) ... [2021-08-27 07:34:19,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c625145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:34:19, skipping insertion in model container [2021-08-27 07:34:19,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:18" (2/3) ... [2021-08-27 07:34:19,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c625145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:34:19, skipping insertion in model container [2021-08-27 07:34:19,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:34:19" (3/3) ... [2021-08-27 07:34:19,633 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_nondet_free_order-1.i [2021-08-27 07:34:19,636 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 07:34:19,637 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2021-08-27 07:34:19,660 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 07:34:19,664 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-27 07:34:19,664 INFO L340 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2021-08-27 07:34:19,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 152 states, 79 states have (on average 1.8987341772151898) internal successors, (150), 142 states have internal predecessors, (150), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 07:34:19,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 07:34:19,681 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:34:19,681 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:34:19,681 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting dll_circular_createErr0REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:34:19,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:34:19,685 INFO L82 PathProgramCache]: Analyzing trace with hash -23350716, now seen corresponding path program 1 times [2021-08-27 07:34:19,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:34:19,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472701491] [2021-08-27 07:34:19,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:19,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:34:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:19,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:34:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:19,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:34:19,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:34:19,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472701491] [2021-08-27 07:34:19,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472701491] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:34:19,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:34:19,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 07:34:19,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179613593] [2021-08-27 07:34:19,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:34:19,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:34:19,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:34:19,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:34:19,860 INFO L87 Difference]: Start difference. First operand has 152 states, 79 states have (on average 1.8987341772151898) internal successors, (150), 142 states have internal predecessors, (150), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:34:20,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:34:20,202 INFO L93 Difference]: Finished difference Result 149 states and 156 transitions. [2021-08-27 07:34:20,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:34:20,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-27 07:34:20,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:34:20,212 INFO L225 Difference]: With dead ends: 149 [2021-08-27 07:34:20,212 INFO L226 Difference]: Without dead ends: 142 [2021-08-27 07:34:20,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:34:20,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-27 07:34:20,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-08-27 07:34:20,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 76 states have (on average 1.8421052631578947) internal successors, (140), 134 states have internal predecessors, (140), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:34:20,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 147 transitions. [2021-08-27 07:34:20,260 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 147 transitions. Word has length 10 [2021-08-27 07:34:20,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:34:20,261 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 147 transitions. [2021-08-27 07:34:20,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:34:20,261 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 147 transitions. [2021-08-27 07:34:20,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 07:34:20,262 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:34:20,262 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:34:20,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 07:34:20,263 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting dll_circular_createErr1REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:34:20,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:34:20,264 INFO L82 PathProgramCache]: Analyzing trace with hash -23350715, now seen corresponding path program 1 times [2021-08-27 07:34:20,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:34:20,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000426142] [2021-08-27 07:34:20,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:20,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:34:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:20,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:34:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:34:20,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:34:20,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000426142] [2021-08-27 07:34:20,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000426142] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:34:20,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:34:20,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 07:34:20,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379782684] [2021-08-27 07:34:20,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:34:20,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:34:20,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:34:20,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:34:20,355 INFO L87 Difference]: Start difference. First operand 142 states and 147 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:34:20,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:34:20,640 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2021-08-27 07:34:20,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:34:20,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-27 07:34:20,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:34:20,642 INFO L225 Difference]: With dead ends: 139 [2021-08-27 07:34:20,642 INFO L226 Difference]: Without dead ends: 139 [2021-08-27 07:34:20,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:34:20,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-08-27 07:34:20,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-08-27 07:34:20,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 76 states have (on average 1.8026315789473684) internal successors, (137), 131 states have internal predecessors, (137), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:34:20,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2021-08-27 07:34:20,647 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 10 [2021-08-27 07:34:20,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:34:20,648 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2021-08-27 07:34:20,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:34:20,648 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2021-08-27 07:34:20,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 07:34:20,648 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:34:20,648 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:34:20,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 07:34:20,649 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting dll_circular_createErr10REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:34:20,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:34:20,649 INFO L82 PathProgramCache]: Analyzing trace with hash 589419475, now seen corresponding path program 1 times [2021-08-27 07:34:20,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:34:20,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950543748] [2021-08-27 07:34:20,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:20,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:34:20,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:20,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:34:20,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:34:20,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:34:20,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950543748] [2021-08-27 07:34:20,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950543748] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:34:20,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:34:20,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 07:34:20,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974622633] [2021-08-27 07:34:20,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 07:34:20,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:34:20,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 07:34:20,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 07:34:20,745 INFO L87 Difference]: Start difference. First operand 139 states and 144 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:34:20,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:34:20,952 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2021-08-27 07:34:20,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 07:34:20,953 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-08-27 07:34:20,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:34:20,953 INFO L225 Difference]: With dead ends: 149 [2021-08-27 07:34:20,954 INFO L226 Difference]: Without dead ends: 149 [2021-08-27 07:34:20,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 07:34:20,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-08-27 07:34:20,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2021-08-27 07:34:20,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 82 states have (on average 1.8048780487804879) internal successors, (148), 137 states have internal predecessors, (148), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:34:20,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2021-08-27 07:34:20,959 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 15 [2021-08-27 07:34:20,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:34:20,959 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2021-08-27 07:34:20,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:34:20,959 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2021-08-27 07:34:20,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 07:34:20,960 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:34:20,960 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:34:20,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 07:34:20,960 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting dll_circular_createErr11REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:34:20,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:34:20,961 INFO L82 PathProgramCache]: Analyzing trace with hash 589419476, now seen corresponding path program 1 times [2021-08-27 07:34:20,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:34:20,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182693773] [2021-08-27 07:34:20,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:20,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:34:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:21,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:34:21,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:21,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:34:21,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:34:21,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182693773] [2021-08-27 07:34:21,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182693773] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:34:21,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:34:21,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 07:34:21,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121880763] [2021-08-27 07:34:21,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 07:34:21,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:34:21,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 07:34:21,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 07:34:21,006 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:34:21,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:34:21,183 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2021-08-27 07:34:21,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 07:34:21,183 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-08-27 07:34:21,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:34:21,184 INFO L225 Difference]: With dead ends: 147 [2021-08-27 07:34:21,184 INFO L226 Difference]: Without dead ends: 147 [2021-08-27 07:34:21,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-27 07:34:21,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-08-27 07:34:21,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2021-08-27 07:34:21,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 80 states have (on average 1.8) internal successors, (144), 135 states have internal predecessors, (144), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:34:21,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 151 transitions. [2021-08-27 07:34:21,189 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 151 transitions. Word has length 15 [2021-08-27 07:34:21,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:34:21,189 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 151 transitions. [2021-08-27 07:34:21,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:34:21,189 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 151 transitions. [2021-08-27 07:34:21,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 07:34:21,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:34:21,190 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:34:21,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 07:34:21,190 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting dll_circular_createErr4REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:34:21,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:34:21,190 INFO L82 PathProgramCache]: Analyzing trace with hash 589421012, now seen corresponding path program 1 times [2021-08-27 07:34:21,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:34:21,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306629935] [2021-08-27 07:34:21,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:21,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:34:21,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:21,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:34:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:34:21,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:34:21,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306629935] [2021-08-27 07:34:21,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306629935] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:34:21,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:34:21,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 07:34:21,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055963331] [2021-08-27 07:34:21,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:34:21,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:34:21,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:34:21,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:34:21,223 INFO L87 Difference]: Start difference. First operand 143 states and 151 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:34:21,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:34:21,362 INFO L93 Difference]: Finished difference Result 142 states and 149 transitions. [2021-08-27 07:34:21,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:34:21,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-08-27 07:34:21,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:34:21,363 INFO L225 Difference]: With dead ends: 142 [2021-08-27 07:34:21,363 INFO L226 Difference]: Without dead ends: 142 [2021-08-27 07:34:21,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:34:21,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-27 07:34:21,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-08-27 07:34:21,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 80 states have (on average 1.775) internal successors, (142), 134 states have internal predecessors, (142), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:34:21,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2021-08-27 07:34:21,367 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 15 [2021-08-27 07:34:21,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:34:21,368 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2021-08-27 07:34:21,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:34:21,368 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2021-08-27 07:34:21,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 07:34:21,368 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:34:21,369 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:34:21,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 07:34:21,369 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting dll_circular_createErr5REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:34:21,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:34:21,369 INFO L82 PathProgramCache]: Analyzing trace with hash 589421013, now seen corresponding path program 1 times [2021-08-27 07:34:21,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:34:21,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207986317] [2021-08-27 07:34:21,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:21,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:34:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:21,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:34:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:34:21,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:34:21,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207986317] [2021-08-27 07:34:21,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207986317] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:34:21,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:34:21,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 07:34:21,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957706192] [2021-08-27 07:34:21,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:34:21,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:34:21,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:34:21,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:34:21,407 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:34:21,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:34:21,534 INFO L93 Difference]: Finished difference Result 141 states and 147 transitions. [2021-08-27 07:34:21,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:34:21,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-08-27 07:34:21,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:34:21,535 INFO L225 Difference]: With dead ends: 141 [2021-08-27 07:34:21,535 INFO L226 Difference]: Without dead ends: 141 [2021-08-27 07:34:21,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:34:21,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-08-27 07:34:21,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-08-27 07:34:21,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 80 states have (on average 1.75) internal successors, (140), 133 states have internal predecessors, (140), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:34:21,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 147 transitions. [2021-08-27 07:34:21,539 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 147 transitions. Word has length 15 [2021-08-27 07:34:21,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:34:21,539 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 147 transitions. [2021-08-27 07:34:21,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:34:21,539 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 147 transitions. [2021-08-27 07:34:21,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-27 07:34:21,540 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:34:21,540 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:34:21,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 07:34:21,540 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting dll_circular_createErr7REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:34:21,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:34:21,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1092182321, now seen corresponding path program 1 times [2021-08-27 07:34:21,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:34:21,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115956807] [2021-08-27 07:34:21,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:21,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:34:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:21,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:34:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:34:21,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:34:21,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115956807] [2021-08-27 07:34:21,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115956807] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:34:21,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:34:21,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:34:21,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277262792] [2021-08-27 07:34:21,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 07:34:21,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:34:21,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 07:34:21,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:34:21,618 INFO L87 Difference]: Start difference. First operand 141 states and 147 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:34:21,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:34:21,770 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2021-08-27 07:34:21,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 07:34:21,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-08-27 07:34:21,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:34:21,771 INFO L225 Difference]: With dead ends: 142 [2021-08-27 07:34:21,771 INFO L226 Difference]: Without dead ends: 142 [2021-08-27 07:34:21,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 07:34:21,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-27 07:34:21,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2021-08-27 07:34:21,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 80 states have (on average 1.7375) internal successors, (139), 133 states have internal predecessors, (139), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:34:21,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2021-08-27 07:34:21,774 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 16 [2021-08-27 07:34:21,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:34:21,774 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2021-08-27 07:34:21,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:34:21,775 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2021-08-27 07:34:21,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 07:34:21,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:34:21,775 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:34:21,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 07:34:21,775 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting dll_circular_createErr10REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:34:21,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:34:21,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1717860195, now seen corresponding path program 1 times [2021-08-27 07:34:21,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:34:21,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122811936] [2021-08-27 07:34:21,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:21,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:34:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:21,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:34:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:34:21,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:34:21,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122811936] [2021-08-27 07:34:21,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122811936] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:34:21,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:34:21,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:34:21,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779520680] [2021-08-27 07:34:21,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 07:34:21,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:34:21,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 07:34:21,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:34:21,879 INFO L87 Difference]: Start difference. First operand 141 states and 146 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:34:22,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:34:22,048 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2021-08-27 07:34:22,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 07:34:22,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-08-27 07:34:22,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:34:22,050 INFO L225 Difference]: With dead ends: 139 [2021-08-27 07:34:22,050 INFO L226 Difference]: Without dead ends: 139 [2021-08-27 07:34:22,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 07:34:22,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-08-27 07:34:22,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-08-27 07:34:22,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 80 states have (on average 1.7125) internal successors, (137), 131 states have internal predecessors, (137), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:34:22,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2021-08-27 07:34:22,053 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 20 [2021-08-27 07:34:22,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:34:22,053 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2021-08-27 07:34:22,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:34:22,054 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2021-08-27 07:34:22,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 07:34:22,054 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:34:22,054 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:34:22,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 07:34:22,054 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting dll_circular_createErr11REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:34:22,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:34:22,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1717860196, now seen corresponding path program 1 times [2021-08-27 07:34:22,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:34:22,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064827128] [2021-08-27 07:34:22,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:22,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:34:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:22,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:34:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:34:22,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:34:22,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064827128] [2021-08-27 07:34:22,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064827128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:34:22,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811971873] [2021-08-27 07:34:22,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:22,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:34:22,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:34:22,145 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:34:22,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 07:34:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:22,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 07:34:22,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:34:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:34:22,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811971873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:34:22,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:34:22,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-27 07:34:22,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37568494] [2021-08-27 07:34:22,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 07:34:22,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:34:22,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 07:34:22,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-27 07:34:22,374 INFO L87 Difference]: Start difference. First operand 139 states and 144 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:34:22,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:34:22,556 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2021-08-27 07:34:22,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 07:34:22,556 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-08-27 07:34:22,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:34:22,557 INFO L225 Difference]: With dead ends: 141 [2021-08-27 07:34:22,557 INFO L226 Difference]: Without dead ends: 141 [2021-08-27 07:34:22,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-27 07:34:22,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-08-27 07:34:22,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-08-27 07:34:22,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 82 states have (on average 1.6951219512195121) internal successors, (139), 133 states have internal predecessors, (139), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:34:22,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2021-08-27 07:34:22,561 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 20 [2021-08-27 07:34:22,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:34:22,562 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2021-08-27 07:34:22,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:34:22,563 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2021-08-27 07:34:22,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 07:34:22,563 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:34:22,564 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:34:22,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-27 07:34:22,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:34:22,782 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting dll_circular_createErr7REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:34:22,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:34:22,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1714106273, now seen corresponding path program 1 times [2021-08-27 07:34:22,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:34:22,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127951529] [2021-08-27 07:34:22,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:22,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:34:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:22,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:34:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:22,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:34:22,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:34:22,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127951529] [2021-08-27 07:34:22,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127951529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:34:22,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088849713] [2021-08-27 07:34:22,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:22,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:34:22,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:34:22,846 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:34:22,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-27 07:34:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:22,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-27 07:34:22,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:34:23,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 07:34:23,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 07:34:23,155 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 07:34:23,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-08-27 07:34:23,163 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 07:34:23,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-08-27 07:34:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:34:23,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088849713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:34:23,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:34:23,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-08-27 07:34:23,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419105285] [2021-08-27 07:34:23,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 07:34:23,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:34:23,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 07:34:23,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-27 07:34:23,242 INFO L87 Difference]: Start difference. First operand 141 states and 146 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:34:23,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:34:23,447 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2021-08-27 07:34:23,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 07:34:23,447 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-08-27 07:34:23,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:34:23,448 INFO L225 Difference]: With dead ends: 139 [2021-08-27 07:34:23,449 INFO L226 Difference]: Without dead ends: 139 [2021-08-27 07:34:23,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-27 07:34:23,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-08-27 07:34:23,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-08-27 07:34:23,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 82 states have (on average 1.670731707317073) internal successors, (137), 131 states have internal predecessors, (137), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:34:23,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2021-08-27 07:34:23,451 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 21 [2021-08-27 07:34:23,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:34:23,452 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2021-08-27 07:34:23,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:34:23,452 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2021-08-27 07:34:23,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-27 07:34:23,453 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:34:23,453 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:34:23,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-27 07:34:23,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-27 07:34:23,671 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting _destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:34:23,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:34:23,671 INFO L82 PathProgramCache]: Analyzing trace with hash 964765578, now seen corresponding path program 1 times [2021-08-27 07:34:23,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:34:23,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036326465] [2021-08-27 07:34:23,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:23,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:34:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:23,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:34:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:23,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:34:23,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-27 07:34:23,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:34:23,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036326465] [2021-08-27 07:34:23,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036326465] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:34:23,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:34:23,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-27 07:34:23,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795853118] [2021-08-27 07:34:23,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 07:34:23,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:34:23,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 07:34:23,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-08-27 07:34:23,781 INFO L87 Difference]: Start difference. First operand 139 states and 144 transitions. Second operand has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 07:34:24,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:34:24,173 INFO L93 Difference]: Finished difference Result 136 states and 141 transitions. [2021-08-27 07:34:24,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 07:34:24,174 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-08-27 07:34:24,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:34:24,175 INFO L225 Difference]: With dead ends: 136 [2021-08-27 07:34:24,175 INFO L226 Difference]: Without dead ends: 136 [2021-08-27 07:34:24,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-27 07:34:24,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-08-27 07:34:24,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-08-27 07:34:24,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 82 states have (on average 1.6341463414634145) internal successors, (134), 128 states have internal predecessors, (134), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:34:24,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 141 transitions. [2021-08-27 07:34:24,178 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 141 transitions. Word has length 32 [2021-08-27 07:34:24,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:34:24,178 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 141 transitions. [2021-08-27 07:34:24,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 07:34:24,178 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 141 transitions. [2021-08-27 07:34:24,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-27 07:34:24,179 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:34:24,179 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:34:24,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-27 07:34:24,179 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:34:24,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:34:24,179 INFO L82 PathProgramCache]: Analyzing trace with hash 964765579, now seen corresponding path program 1 times [2021-08-27 07:34:24,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:34:24,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714804728] [2021-08-27 07:34:24,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:24,180 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:34:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:24,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:34:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:24,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:34:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:24,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:34:24,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:34:24,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714804728] [2021-08-27 07:34:24,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714804728] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:34:24,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:34:24,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-27 07:34:24,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964576926] [2021-08-27 07:34:24,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 07:34:24,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:34:24,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 07:34:24,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-08-27 07:34:24,323 INFO L87 Difference]: Start difference. First operand 136 states and 141 transitions. Second operand has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 07:34:24,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:34:24,745 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2021-08-27 07:34:24,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 07:34:24,745 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-08-27 07:34:24,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:34:24,746 INFO L225 Difference]: With dead ends: 129 [2021-08-27 07:34:24,746 INFO L226 Difference]: Without dead ends: 129 [2021-08-27 07:34:24,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-27 07:34:24,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-08-27 07:34:24,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-08-27 07:34:24,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 82 states have (on average 1.548780487804878) internal successors, (127), 121 states have internal predecessors, (127), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:34:24,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 134 transitions. [2021-08-27 07:34:24,749 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 134 transitions. Word has length 32 [2021-08-27 07:34:24,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:34:24,749 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 134 transitions. [2021-08-27 07:34:24,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 07:34:24,749 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 134 transitions. [2021-08-27 07:34:24,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-27 07:34:24,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:34:24,750 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:34:24,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-27 07:34:24,750 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting _destroy_in_nondeterministic_orderErr19ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:34:24,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:34:24,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1105471948, now seen corresponding path program 1 times [2021-08-27 07:34:24,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:34:24,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197782584] [2021-08-27 07:34:24,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:24,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:34:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:24,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:34:24,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:24,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:34:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:25,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:34:25,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:34:25,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197782584] [2021-08-27 07:34:25,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197782584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:34:25,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864477600] [2021-08-27 07:34:25,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:25,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:34:25,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:34:25,087 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:34:25,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-27 07:34:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:25,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-27 07:34:25,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:34:25,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 07:34:25,310 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 07:34:25,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-08-27 07:34:25,450 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-08-27 07:34:25,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-08-27 07:34:25,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-27 07:34:25,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-08-27 07:34:25,722 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-27 07:34:25,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 42 [2021-08-27 07:34:25,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:34:25,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-27 07:34:25,807 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 07:34:25,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 48 [2021-08-27 07:34:26,345 INFO L354 Elim1Store]: treesize reduction 78, result has 3.7 percent of original size [2021-08-27 07:34:26,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 35 [2021-08-27 07:34:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:34:26,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864477600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:34:26,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:34:26,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 34 [2021-08-27 07:34:26,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014912415] [2021-08-27 07:34:26,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-27 07:34:26,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:34:26,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-27 07:34:26,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1098, Unknown=0, NotChecked=0, Total=1190 [2021-08-27 07:34:26,364 INFO L87 Difference]: Start difference. First operand 129 states and 134 transitions. Second operand has 35 states, 32 states have (on average 1.8125) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:34:27,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:34:27,921 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2021-08-27 07:34:27,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-27 07:34:27,922 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.8125) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2021-08-27 07:34:27,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:34:27,924 INFO L225 Difference]: With dead ends: 126 [2021-08-27 07:34:27,924 INFO L226 Difference]: Without dead ends: 126 [2021-08-27 07:34:27,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1469.2ms TimeCoverageRelationStatistics Valid=333, Invalid=2423, Unknown=0, NotChecked=0, Total=2756 [2021-08-27 07:34:27,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-08-27 07:34:27,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2021-08-27 07:34:27,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 82 states have (on average 1.4878048780487805) internal successors, (122), 116 states have internal predecessors, (122), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:34:27,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 129 transitions. [2021-08-27 07:34:27,927 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 129 transitions. Word has length 38 [2021-08-27 07:34:27,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:34:27,927 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 129 transitions. [2021-08-27 07:34:27,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.8125) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:34:27,928 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 129 transitions. [2021-08-27 07:34:27,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-27 07:34:27,929 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:34:27,929 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:34:27,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-27 07:34:28,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:34:28,147 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting _destroy_in_nondeterministic_orderErr34ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:34:28,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:34:28,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1105470732, now seen corresponding path program 1 times [2021-08-27 07:34:28,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:34:28,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287958245] [2021-08-27 07:34:28,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:28,148 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:34:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:28,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:34:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:28,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:34:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:34:28,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:34:28,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287958245] [2021-08-27 07:34:28,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287958245] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:34:28,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:34:28,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-08-27 07:34:28,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541796905] [2021-08-27 07:34:28,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-27 07:34:28,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:34:28,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-27 07:34:28,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-08-27 07:34:28,404 INFO L87 Difference]: Start difference. First operand 124 states and 129 transitions. Second operand has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 07:34:28,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:34:28,922 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2021-08-27 07:34:28,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 07:34:28,923 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2021-08-27 07:34:28,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:34:28,924 INFO L225 Difference]: With dead ends: 119 [2021-08-27 07:34:28,924 INFO L226 Difference]: Without dead ends: 119 [2021-08-27 07:34:28,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 261.2ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-08-27 07:34:28,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-08-27 07:34:28,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-08-27 07:34:28,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 82 states have (on average 1.4268292682926829) internal successors, (117), 111 states have internal predecessors, (117), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:34:28,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 124 transitions. [2021-08-27 07:34:28,926 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 124 transitions. Word has length 38 [2021-08-27 07:34:28,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:34:28,927 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 124 transitions. [2021-08-27 07:34:28,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 07:34:28,927 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 124 transitions. [2021-08-27 07:34:28,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-27 07:34:28,927 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:34:28,927 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:34:28,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-27 07:34:28,928 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting _destroy_in_nondeterministic_orderErr5ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:34:28,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:34:28,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1105509714, now seen corresponding path program 1 times [2021-08-27 07:34:28,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:34:28,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148904714] [2021-08-27 07:34:28,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:28,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:34:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:28,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:34:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:28,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:34:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:34:29,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:34:29,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148904714] [2021-08-27 07:34:29,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148904714] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:34:29,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:34:29,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-27 07:34:29,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500833418] [2021-08-27 07:34:29,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 07:34:29,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:34:29,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 07:34:29,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-08-27 07:34:29,019 INFO L87 Difference]: Start difference. First operand 119 states and 124 transitions. Second operand has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 07:34:29,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:34:29,404 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2021-08-27 07:34:29,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 07:34:29,405 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2021-08-27 07:34:29,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:34:29,405 INFO L225 Difference]: With dead ends: 114 [2021-08-27 07:34:29,406 INFO L226 Difference]: Without dead ends: 114 [2021-08-27 07:34:29,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-27 07:34:29,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-08-27 07:34:29,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-08-27 07:34:29,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 82 states have (on average 1.3658536585365855) internal successors, (112), 106 states have internal predecessors, (112), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:34:29,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2021-08-27 07:34:29,408 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 38 [2021-08-27 07:34:29,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:34:29,408 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2021-08-27 07:34:29,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 07:34:29,408 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2021-08-27 07:34:29,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-27 07:34:29,409 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:34:29,409 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:34:29,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-27 07:34:29,409 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting _destroy_in_nondeterministic_orderErr20ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:34:29,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:34:29,410 INFO L82 PathProgramCache]: Analyzing trace with hash 90108066, now seen corresponding path program 1 times [2021-08-27 07:34:29,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:34:29,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641858316] [2021-08-27 07:34:29,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:29,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:34:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:29,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:34:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:29,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:34:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:34:29,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:34:29,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641858316] [2021-08-27 07:34:29,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641858316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:34:29,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806244883] [2021-08-27 07:34:29,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:29,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:34:29,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:34:29,730 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:34:29,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-27 07:34:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:29,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-27 07:34:29,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:34:29,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 07:34:30,031 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-08-27 07:34:30,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-08-27 07:34:30,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-27 07:34:30,107 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 07:34:30,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-08-27 07:34:30,242 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-08-27 07:34:30,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 39 [2021-08-27 07:34:30,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:34:30,322 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-08-27 07:34:30,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 55 [2021-08-27 07:34:30,751 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-27 07:34:30,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 29 [2021-08-27 07:34:30,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:34:30,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806244883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:34:30,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:34:30,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 30 [2021-08-27 07:34:30,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366262130] [2021-08-27 07:34:30,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-27 07:34:30,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:34:30,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-27 07:34:30,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2021-08-27 07:34:30,768 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand has 31 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 25 states have internal predecessors, (51), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:34:32,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:34:32,240 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-08-27 07:34:32,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-27 07:34:32,240 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 25 states have internal predecessors, (51), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2021-08-27 07:34:32,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:34:32,242 INFO L225 Difference]: With dead ends: 113 [2021-08-27 07:34:32,242 INFO L226 Difference]: Without dead ends: 113 [2021-08-27 07:34:32,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1286.1ms TimeCoverageRelationStatistics Valid=261, Invalid=2091, Unknown=0, NotChecked=0, Total=2352 [2021-08-27 07:34:32,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-08-27 07:34:32,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2021-08-27 07:34:32,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 82 states have (on average 1.3048780487804879) internal successors, (107), 101 states have internal predecessors, (107), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:34:32,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2021-08-27 07:34:32,244 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 39 [2021-08-27 07:34:32,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:34:32,245 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2021-08-27 07:34:32,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 25 states have internal predecessors, (51), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:34:32,245 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2021-08-27 07:34:32,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-27 07:34:32,245 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:34:32,245 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:34:32,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-27 07:34:32,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-27 07:34:32,457 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting _destroy_in_nondeterministic_orderErr35ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:34:32,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:34:32,457 INFO L82 PathProgramCache]: Analyzing trace with hash 90145800, now seen corresponding path program 1 times [2021-08-27 07:34:32,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:34:32,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730069521] [2021-08-27 07:34:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:32,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:34:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:32,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:34:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:32,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:34:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:34:32,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:34:32,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730069521] [2021-08-27 07:34:32,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730069521] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:34:32,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:34:32,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-08-27 07:34:32,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800844822] [2021-08-27 07:34:32,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-27 07:34:32,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:34:32,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-27 07:34:32,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-08-27 07:34:32,706 INFO L87 Difference]: Start difference. First operand 109 states and 114 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 07:34:33,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:34:33,259 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-08-27 07:34:33,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 07:34:33,259 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2021-08-27 07:34:33,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:34:33,260 INFO L225 Difference]: With dead ends: 104 [2021-08-27 07:34:33,260 INFO L226 Difference]: Without dead ends: 104 [2021-08-27 07:34:33,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 269.2ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-08-27 07:34:33,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-27 07:34:33,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-08-27 07:34:33,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 96 states have internal predecessors, (102), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:34:33,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2021-08-27 07:34:33,262 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 39 [2021-08-27 07:34:33,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:34:33,262 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2021-08-27 07:34:33,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 07:34:33,262 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2021-08-27 07:34:33,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-27 07:34:33,263 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:34:33,263 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:34:33,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-27 07:34:33,263 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting _destroy_in_nondeterministic_orderErr21ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:34:33,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:34:33,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1501617162, now seen corresponding path program 1 times [2021-08-27 07:34:33,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:34:33,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675451438] [2021-08-27 07:34:33,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:33,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:34:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:33,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:34:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:33,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:34:33,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:33,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:34:33,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:34:33,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675451438] [2021-08-27 07:34:33,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675451438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:34:33,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506949404] [2021-08-27 07:34:33,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:33,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:34:33,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:34:33,537 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:34:33,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-27 07:34:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:33,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-27 07:34:33,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:34:33,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 07:34:33,871 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-08-27 07:34:33,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-08-27 07:34:33,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-27 07:34:33,975 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 07:34:33,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-08-27 07:34:34,126 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-08-27 07:34:34,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 39 [2021-08-27 07:34:34,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:34:34,206 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-08-27 07:34:34,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 60 [2021-08-27 07:34:34,713 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-27 07:34:34,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 39 [2021-08-27 07:34:34,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:34:34,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506949404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:34:34,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:34:34,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 32 [2021-08-27 07:34:34,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395374507] [2021-08-27 07:34:34,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-27 07:34:34,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:34:34,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-27 07:34:34,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2021-08-27 07:34:34,929 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 33 states, 30 states have (on average 2.0) internal successors, (60), 27 states have internal predecessors, (60), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:34:36,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:34:36,223 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2021-08-27 07:34:36,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-27 07:34:36,224 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.0) internal successors, (60), 27 states have internal predecessors, (60), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2021-08-27 07:34:36,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:34:36,224 INFO L225 Difference]: With dead ends: 107 [2021-08-27 07:34:36,225 INFO L226 Difference]: Without dead ends: 107 [2021-08-27 07:34:36,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1168.5ms TimeCoverageRelationStatistics Valid=253, Invalid=2003, Unknown=0, NotChecked=0, Total=2256 [2021-08-27 07:34:36,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-08-27 07:34:36,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2021-08-27 07:34:36,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 82 states have (on average 1.2317073170731707) internal successors, (101), 95 states have internal predecessors, (101), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:34:36,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2021-08-27 07:34:36,227 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 40 [2021-08-27 07:34:36,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:34:36,227 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2021-08-27 07:34:36,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.0) internal successors, (60), 27 states have internal predecessors, (60), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:34:36,227 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2021-08-27 07:34:36,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-27 07:34:36,227 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:34:36,227 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:34:36,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-27 07:34:36,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-27 07:34:36,437 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting _destroy_in_nondeterministic_orderErr36ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:34:36,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:34:36,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1500447370, now seen corresponding path program 1 times [2021-08-27 07:34:36,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:34:36,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336995673] [2021-08-27 07:34:36,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:36,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:34:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:36,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:34:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:36,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:34:36,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:36,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:34:36,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:34:36,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336995673] [2021-08-27 07:34:36,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336995673] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:34:36,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:34:36,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-08-27 07:34:36,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936543720] [2021-08-27 07:34:36,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-27 07:34:36,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:34:36,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-27 07:34:36,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-08-27 07:34:36,631 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 07:34:37,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:34:37,092 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2021-08-27 07:34:37,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 07:34:37,093 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2021-08-27 07:34:37,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:34:37,093 INFO L225 Difference]: With dead ends: 102 [2021-08-27 07:34:37,093 INFO L226 Difference]: Without dead ends: 102 [2021-08-27 07:34:37,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 239.4ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-08-27 07:34:37,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-27 07:34:37,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-08-27 07:34:37,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 94 states have internal predecessors, (100), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:34:37,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2021-08-27 07:34:37,095 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 40 [2021-08-27 07:34:37,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:34:37,095 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2021-08-27 07:34:37,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 07:34:37,095 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2021-08-27 07:34:37,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-27 07:34:37,095 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:34:37,096 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:34:37,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-27 07:34:37,096 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting _destroy_in_nondeterministic_orderErr15ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:34:37,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:34:37,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1505910075, now seen corresponding path program 1 times [2021-08-27 07:34:37,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:34:37,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383564878] [2021-08-27 07:34:37,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:37,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:34:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:37,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:34:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:37,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:34:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:34:37,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:34:37,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383564878] [2021-08-27 07:34:37,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383564878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:34:37,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961430229] [2021-08-27 07:34:37,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:37,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:34:37,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:34:37,401 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:34:37,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-27 07:34:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:37,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-27 07:34:37,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:34:37,734 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 07:34:37,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-08-27 07:34:37,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-27 07:34:37,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 07:34:37,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-08-27 07:34:38,176 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 07:34:38,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-08-27 07:34:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:34:38,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961430229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:34:38,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:34:38,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 28 [2021-08-27 07:34:38,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655207249] [2021-08-27 07:34:38,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-27 07:34:38,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:34:38,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-27 07:34:38,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=740, Unknown=0, NotChecked=0, Total=812 [2021-08-27 07:34:38,235 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand has 29 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 23 states have internal predecessors, (55), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:34:38,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:34:38,926 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2021-08-27 07:34:38,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 07:34:38,926 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 23 states have internal predecessors, (55), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-08-27 07:34:38,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:34:38,927 INFO L225 Difference]: With dead ends: 101 [2021-08-27 07:34:38,927 INFO L226 Difference]: Without dead ends: 101 [2021-08-27 07:34:38,927 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 576.1ms TimeCoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-08-27 07:34:38,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-08-27 07:34:38,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-08-27 07:34:38,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 93 states have internal predecessors, (99), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:34:38,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2021-08-27 07:34:38,954 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 43 [2021-08-27 07:34:38,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:34:38,955 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2021-08-27 07:34:38,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 23 states have internal predecessors, (55), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:34:38,955 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2021-08-27 07:34:38,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-27 07:34:38,955 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:34:38,955 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:34:38,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-27 07:34:39,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:34:39,173 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting _destroy_in_nondeterministic_orderErr9ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:34:39,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:34:39,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1506341051, now seen corresponding path program 1 times [2021-08-27 07:34:39,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:34:39,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656915471] [2021-08-27 07:34:39,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:39,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:34:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:39,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:34:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:39,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:34:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:39,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:34:39,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:34:39,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656915471] [2021-08-27 07:34:39,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656915471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:34:39,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856474227] [2021-08-27 07:34:39,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:34:39,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:34:39,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:34:39,473 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:34:39,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-27 07:34:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:34:39,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-27 07:34:39,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:34:39,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 07:34:39,852 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 07:34:39,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-08-27 07:34:39,899 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-08-27 07:34:39,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-08-27 07:34:39,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-27 07:34:39,952 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 07:34:39,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-08-27 07:34:40,061 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-08-27 07:34:40,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 39 [2021-08-27 07:34:40,133 INFO L354 Elim1Store]: treesize reduction 116, result has 20.5 percent of original size [2021-08-27 07:34:40,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 66 [2021-08-27 07:34:42,076 INFO L354 Elim1Store]: treesize reduction 104, result has 21.8 percent of original size [2021-08-27 07:34:42,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 115 treesize of output 71 [2021-08-27 07:34:42,565 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 07:34:42,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-08-27 07:34:42,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:34:42,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856474227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:34:42,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:34:42,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 34 [2021-08-27 07:34:42,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759316651] [2021-08-27 07:34:42,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-27 07:34:42,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:34:42,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-27 07:34:42,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1111, Unknown=0, NotChecked=0, Total=1190 [2021-08-27 07:34:42,622 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand has 35 states, 32 states have (on average 2.125) internal successors, (68), 29 states have internal predecessors, (68), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:35:08,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:35:08,714 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-08-27 07:35:08,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-27 07:35:08,715 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.125) internal successors, (68), 29 states have internal predecessors, (68), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-08-27 07:35:08,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:35:08,715 INFO L225 Difference]: With dead ends: 104 [2021-08-27 07:35:08,715 INFO L226 Difference]: Without dead ends: 104 [2021-08-27 07:35:08,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 7593.7ms TimeCoverageRelationStatistics Valid=338, Invalid=2963, Unknown=5, NotChecked=0, Total=3306 [2021-08-27 07:35:08,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-27 07:35:08,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2021-08-27 07:35:08,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 92 states have internal predecessors, (98), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:35:08,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2021-08-27 07:35:08,718 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 43 [2021-08-27 07:35:08,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:35:08,718 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2021-08-27 07:35:08,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.125) internal successors, (68), 29 states have internal predecessors, (68), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:35:08,718 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2021-08-27 07:35:08,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-27 07:35:08,718 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:35:08,718 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:35:08,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-08-27 07:35:08,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:35:08,919 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting _destroy_in_nondeterministic_orderErr30ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:35:08,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:35:08,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1240568634, now seen corresponding path program 1 times [2021-08-27 07:35:08,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:35:08,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494055902] [2021-08-27 07:35:08,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:35:08,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:35:08,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:09,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:35:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:09,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:35:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:09,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:35:09,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:35:09,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494055902] [2021-08-27 07:35:09,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494055902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:35:09,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881646035] [2021-08-27 07:35:09,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:35:09,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:35:09,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:35:09,472 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:35:09,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-27 07:35:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:09,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-27 07:35:09,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:35:09,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 07:35:09,912 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 07:35:09,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-27 07:35:10,005 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-27 07:35:10,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-08-27 07:35:10,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-27 07:35:10,083 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 07:35:10,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-08-27 07:35:10,227 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-08-27 07:35:10,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 38 [2021-08-27 07:35:10,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:35:10,307 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-08-27 07:35:10,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 59 [2021-08-27 07:35:10,877 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-27 07:35:10,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 36 [2021-08-27 07:35:10,913 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 07:35:10,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-08-27 07:35:10,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:35:10,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881646035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:35:10,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:35:10,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 39 [2021-08-27 07:35:10,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976077149] [2021-08-27 07:35:10,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-27 07:35:10,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:35:10,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-27 07:35:10,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2021-08-27 07:35:10,986 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand has 40 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:35:12,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:35:12,810 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2021-08-27 07:35:12,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-27 07:35:12,811 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-08-27 07:35:12,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:35:12,811 INFO L225 Difference]: With dead ends: 101 [2021-08-27 07:35:12,811 INFO L226 Difference]: Without dead ends: 101 [2021-08-27 07:35:12,812 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1823.2ms TimeCoverageRelationStatistics Valid=339, Invalid=3083, Unknown=0, NotChecked=0, Total=3422 [2021-08-27 07:35:12,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-08-27 07:35:12,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2021-08-27 07:35:12,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 89 states have internal predecessors, (95), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:35:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2021-08-27 07:35:12,814 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 44 [2021-08-27 07:35:12,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:35:12,814 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2021-08-27 07:35:12,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:35:12,814 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2021-08-27 07:35:12,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-27 07:35:12,814 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:35:12,814 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:35:12,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-27 07:35:13,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-27 07:35:13,025 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting _destroy_in_nondeterministic_orderErr24ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:35:13,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:35:13,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1240137658, now seen corresponding path program 1 times [2021-08-27 07:35:13,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:35:13,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506868255] [2021-08-27 07:35:13,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:35:13,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:35:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:13,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:35:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:13,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:35:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:35:13,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:35:13,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506868255] [2021-08-27 07:35:13,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506868255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:35:13,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783709279] [2021-08-27 07:35:13,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:35:13,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:35:13,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:35:13,367 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:35:13,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-27 07:35:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:13,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-27 07:35:13,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:35:13,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 07:35:13,888 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 07:35:13,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-08-27 07:35:13,963 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-08-27 07:35:13,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-08-27 07:35:13,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-27 07:35:14,026 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 07:35:14,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-08-27 07:35:14,113 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-08-27 07:35:14,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 34 [2021-08-27 07:35:14,182 INFO L354 Elim1Store]: treesize reduction 116, result has 20.5 percent of original size [2021-08-27 07:35:14,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 56 [2021-08-27 07:35:17,337 INFO L354 Elim1Store]: treesize reduction 104, result has 21.8 percent of original size [2021-08-27 07:35:17,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 61 [2021-08-27 07:35:17,511 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 07:35:17,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 27 [2021-08-27 07:35:17,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:35:17,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783709279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:35:17,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:35:17,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-08-27 07:35:17,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926452457] [2021-08-27 07:35:17,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-27 07:35:17,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:35:17,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-27 07:35:17,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1453, Unknown=2, NotChecked=0, Total=1560 [2021-08-27 07:35:17,689 INFO L87 Difference]: Start difference. First operand 97 states and 102 transitions. Second operand has 40 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 34 states have internal predecessors, (71), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:35:36,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:35:36,289 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2021-08-27 07:35:36,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-27 07:35:36,289 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 34 states have internal predecessors, (71), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-08-27 07:35:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:35:36,290 INFO L225 Difference]: With dead ends: 100 [2021-08-27 07:35:36,290 INFO L226 Difference]: Without dead ends: 100 [2021-08-27 07:35:36,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 11345.7ms TimeCoverageRelationStatistics Valid=399, Invalid=3625, Unknown=8, NotChecked=0, Total=4032 [2021-08-27 07:35:36,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-27 07:35:36,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2021-08-27 07:35:36,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 82 states have (on average 1.146341463414634) internal successors, (94), 88 states have internal predecessors, (94), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:35:36,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2021-08-27 07:35:36,292 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 44 [2021-08-27 07:35:36,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:35:36,292 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2021-08-27 07:35:36,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 34 states have internal predecessors, (71), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:35:36,293 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2021-08-27 07:35:36,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-27 07:35:36,293 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:35:36,293 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:35:36,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-27 07:35:36,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:35:36,501 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting _destroy_in_nondeterministic_orderErr45ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:35:36,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:35:36,501 INFO L82 PathProgramCache]: Analyzing trace with hash -762542534, now seen corresponding path program 1 times [2021-08-27 07:35:36,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:35:36,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079433626] [2021-08-27 07:35:36,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:35:36,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:35:36,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:36,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:35:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:36,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:35:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:35:36,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:35:36,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079433626] [2021-08-27 07:35:36,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079433626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:35:36,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030912383] [2021-08-27 07:35:36,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:35:36,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:35:36,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:35:36,990 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:35:37,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-27 07:35:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:37,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-27 07:35:37,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:35:37,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 07:35:37,542 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 07:35:37,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-27 07:35:37,635 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-27 07:35:37,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-08-27 07:35:37,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-27 07:35:37,707 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 07:35:37,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 80 [2021-08-27 07:35:37,873 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-08-27 07:35:37,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 43 [2021-08-27 07:35:37,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:35:37,957 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-08-27 07:35:37,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 59 [2021-08-27 07:35:38,534 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-27 07:35:38,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 36 [2021-08-27 07:35:38,566 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 07:35:38,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-08-27 07:35:38,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:35:38,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030912383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:35:38,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:35:38,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 38 [2021-08-27 07:35:38,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117111117] [2021-08-27 07:35:38,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-27 07:35:38,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:35:38,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-27 07:35:38,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-08-27 07:35:38,622 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 39 states, 36 states have (on average 1.75) internal successors, (63), 33 states have internal predecessors, (63), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:35:40,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:35:40,404 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2021-08-27 07:35:40,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-27 07:35:40,404 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.75) internal successors, (63), 33 states have internal predecessors, (63), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-08-27 07:35:40,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:35:40,405 INFO L225 Difference]: With dead ends: 99 [2021-08-27 07:35:40,405 INFO L226 Difference]: Without dead ends: 99 [2021-08-27 07:35:40,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1754.6ms TimeCoverageRelationStatistics Valid=325, Invalid=2981, Unknown=0, NotChecked=0, Total=3306 [2021-08-27 07:35:40,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-08-27 07:35:40,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2021-08-27 07:35:40,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 87 states have internal predecessors, (93), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:35:40,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 100 transitions. [2021-08-27 07:35:40,407 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 100 transitions. Word has length 44 [2021-08-27 07:35:40,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:35:40,407 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 100 transitions. [2021-08-27 07:35:40,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.75) internal successors, (63), 33 states have internal predecessors, (63), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:35:40,407 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 100 transitions. [2021-08-27 07:35:40,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-27 07:35:40,407 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:35:40,407 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:35:40,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-27 07:35:40,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-27 07:35:40,617 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting _destroy_in_nondeterministic_orderErr39ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:35:40,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:35:40,617 INFO L82 PathProgramCache]: Analyzing trace with hash -762973510, now seen corresponding path program 1 times [2021-08-27 07:35:40,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:35:40,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241293872] [2021-08-27 07:35:40,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:35:40,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:35:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:40,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:35:40,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:40,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:35:40,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:40,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:35:40,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:35:40,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241293872] [2021-08-27 07:35:40,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241293872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:35:40,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025609380] [2021-08-27 07:35:40,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:35:40,841 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:35:40,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:35:40,842 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:35:40,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-27 07:35:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:41,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-27 07:35:41,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:35:41,436 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 07:35:41,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-08-27 07:35:41,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-27 07:35:41,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 07:35:41,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-08-27 07:35:41,697 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 07:35:41,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 27 [2021-08-27 07:35:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:35:41,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025609380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:35:41,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:35:41,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-08-27 07:35:41,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344163039] [2021-08-27 07:35:41,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-27 07:35:41,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:35:41,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-27 07:35:41,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-08-27 07:35:41,820 INFO L87 Difference]: Start difference. First operand 95 states and 100 transitions. Second operand has 28 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:35:42,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:35:42,634 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2021-08-27 07:35:42,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 07:35:42,635 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-08-27 07:35:42,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:35:42,635 INFO L225 Difference]: With dead ends: 94 [2021-08-27 07:35:42,635 INFO L226 Difference]: Without dead ends: 94 [2021-08-27 07:35:42,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 549.9ms TimeCoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-08-27 07:35:42,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-27 07:35:42,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-08-27 07:35:42,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 86 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:35:42,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2021-08-27 07:35:42,637 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 44 [2021-08-27 07:35:42,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:35:42,637 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2021-08-27 07:35:42,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:35:42,638 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2021-08-27 07:35:42,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-27 07:35:42,638 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:35:42,638 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:35:42,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-27 07:35:42,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-27 07:35:42,839 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting _destroy_in_nondeterministic_orderErr18ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:35:42,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:35:42,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1633566043, now seen corresponding path program 1 times [2021-08-27 07:35:42,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:35:42,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860380449] [2021-08-27 07:35:42,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:35:42,839 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:35:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:43,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:35:43,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:43,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:35:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:35:43,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:35:43,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860380449] [2021-08-27 07:35:43,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860380449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:35:43,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283479116] [2021-08-27 07:35:43,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:35:43,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:35:43,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:35:43,381 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:35:43,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-27 07:35:43,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:43,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-27 07:35:43,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:35:43,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 07:35:43,999 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 07:35:43,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-27 07:35:44,098 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-27 07:35:44,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-08-27 07:35:44,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-27 07:35:44,173 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 07:35:44,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 80 [2021-08-27 07:35:44,356 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-08-27 07:35:44,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 43 [2021-08-27 07:35:44,433 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-08-27 07:35:44,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 57 [2021-08-27 07:35:44,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:35:44,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:35:45,018 INFO L354 Elim1Store]: treesize reduction 124, result has 16.8 percent of original size [2021-08-27 07:35:45,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 60 [2021-08-27 07:35:45,495 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 07:35:45,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2021-08-27 07:35:45,601 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-08-27 07:35:45,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 30 [2021-08-27 07:35:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:35:45,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283479116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:35:45,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:35:45,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 43 [2021-08-27 07:35:45,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139271542] [2021-08-27 07:35:45,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-27 07:35:45,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:35:45,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-27 07:35:45,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1779, Unknown=0, NotChecked=0, Total=1892 [2021-08-27 07:35:45,700 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 44 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 38 states have internal predecessors, (72), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:35:48,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:35:48,485 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-08-27 07:35:48,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-27 07:35:48,486 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 38 states have internal predecessors, (72), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2021-08-27 07:35:48,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:35:48,486 INFO L225 Difference]: With dead ends: 96 [2021-08-27 07:35:48,487 INFO L226 Difference]: Without dead ends: 96 [2021-08-27 07:35:48,487 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 2781.1ms TimeCoverageRelationStatistics Valid=375, Invalid=4047, Unknown=0, NotChecked=0, Total=4422 [2021-08-27 07:35:48,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-08-27 07:35:48,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2021-08-27 07:35:48,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 84 states have internal predecessors, (90), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:35:48,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2021-08-27 07:35:48,489 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 46 [2021-08-27 07:35:48,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:35:48,489 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2021-08-27 07:35:48,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 38 states have internal predecessors, (72), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:35:48,490 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2021-08-27 07:35:48,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-27 07:35:48,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:35:48,490 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:35:48,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-27 07:35:48,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-27 07:35:48,702 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting _destroy_in_nondeterministic_orderErr33ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:35:48,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:35:48,703 INFO L82 PathProgramCache]: Analyzing trace with hash -413294311, now seen corresponding path program 1 times [2021-08-27 07:35:48,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:35:48,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994611171] [2021-08-27 07:35:48,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:35:48,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:35:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:48,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:35:48,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:48,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:35:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:35:49,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:35:49,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994611171] [2021-08-27 07:35:49,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994611171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:35:49,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334464270] [2021-08-27 07:35:49,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:35:49,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:35:49,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:35:49,204 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:35:49,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-27 07:35:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:49,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-27 07:35:49,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:35:49,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 07:35:49,942 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 07:35:49,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-08-27 07:35:50,012 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-08-27 07:35:50,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-08-27 07:35:50,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-27 07:35:50,081 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 07:35:50,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-08-27 07:35:50,187 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-08-27 07:35:50,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 34 [2021-08-27 07:35:50,255 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-08-27 07:35:50,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 48 [2021-08-27 07:35:50,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:35:50,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:35:50,746 INFO L354 Elim1Store]: treesize reduction 124, result has 16.8 percent of original size [2021-08-27 07:35:50,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 57 treesize of output 51 [2021-08-27 07:35:51,068 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 07:35:51,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 51 [2021-08-27 07:35:51,450 INFO L354 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2021-08-27 07:35:51,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 71 [2021-08-27 07:35:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:35:52,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334464270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:35:52,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:35:52,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 44 [2021-08-27 07:35:52,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779676649] [2021-08-27 07:35:52,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-27 07:35:52,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:35:52,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-27 07:35:52,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1848, Unknown=0, NotChecked=0, Total=1980 [2021-08-27 07:35:52,049 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand has 45 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 39 states have internal predecessors, (77), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:35:54,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:35:54,507 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2021-08-27 07:35:54,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-27 07:35:54,507 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 39 states have internal predecessors, (77), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2021-08-27 07:35:54,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:35:54,508 INFO L225 Difference]: With dead ends: 94 [2021-08-27 07:35:54,508 INFO L226 Difference]: Without dead ends: 94 [2021-08-27 07:35:54,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 2609.4ms TimeCoverageRelationStatistics Valid=442, Invalid=4388, Unknown=0, NotChecked=0, Total=4830 [2021-08-27 07:35:54,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-27 07:35:54,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2021-08-27 07:35:54,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 82 states have internal predecessors, (88), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:35:54,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2021-08-27 07:35:54,510 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 47 [2021-08-27 07:35:54,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:35:54,510 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2021-08-27 07:35:54,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 39 states have internal predecessors, (77), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:35:54,511 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2021-08-27 07:35:54,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-27 07:35:54,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:35:54,511 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:35:54,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-27 07:35:54,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-27 07:35:54,721 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:35:54,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:35:54,721 INFO L82 PathProgramCache]: Analyzing trace with hash 491836438, now seen corresponding path program 1 times [2021-08-27 07:35:54,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:35:54,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15080588] [2021-08-27 07:35:54,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:35:54,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:35:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:54,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:35:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:54,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:35:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:55,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-08-27 07:35:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:55,638 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:35:55,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:35:55,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15080588] [2021-08-27 07:35:55,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15080588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:35:55,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438085502] [2021-08-27 07:35:55,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:35:55,638 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:35:55,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:35:55,639 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:35:55,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-27 07:35:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:35:56,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-27 07:35:56,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:35:56,475 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-08-27 07:35:56,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 26 [2021-08-27 07:35:56,606 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-27 07:35:56,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-08-27 07:35:56,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-27 07:35:56,804 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 07:35:56,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 38 [2021-08-27 07:35:56,992 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-08-27 07:35:56,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 48 [2021-08-27 07:35:57,092 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-08-27 07:35:57,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 72 [2021-08-27 07:35:57,402 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-08-27 07:35:57,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 80 [2021-08-27 07:35:57,406 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-08-27 07:35:57,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 59 [2021-08-27 07:36:02,207 INFO L354 Elim1Store]: treesize reduction 348, result has 32.9 percent of original size [2021-08-27 07:36:02,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 174 treesize of output 262 [2021-08-27 07:36:02,245 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-08-27 07:36:02,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 232 treesize of output 229 [2021-08-27 07:36:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:36:06,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438085502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:36:06,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:36:06,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 50 [2021-08-27 07:36:06,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095053663] [2021-08-27 07:36:06,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-27 07:36:06,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:36:06,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-27 07:36:06,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2411, Unknown=0, NotChecked=0, Total=2550 [2021-08-27 07:36:06,448 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 51 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 46 states have internal predecessors, (83), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 07:36:18,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:36:18,572 INFO L93 Difference]: Finished difference Result 160 states and 172 transitions. [2021-08-27 07:36:18,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-27 07:36:18,573 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 46 states have internal predecessors, (83), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2021-08-27 07:36:18,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:36:18,576 INFO L225 Difference]: With dead ends: 160 [2021-08-27 07:36:18,576 INFO L226 Difference]: Without dead ends: 148 [2021-08-27 07:36:18,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2092 ImplicationChecksByTransitivity, 14722.9ms TimeCoverageRelationStatistics Valid=566, Invalid=8363, Unknown=1, NotChecked=0, Total=8930 [2021-08-27 07:36:18,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-08-27 07:36:18,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 124. [2021-08-27 07:36:18,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 113 states have (on average 1.0884955752212389) internal successors, (123), 114 states have internal predecessors, (123), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-27 07:36:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2021-08-27 07:36:18,591 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 50 [2021-08-27 07:36:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:36:18,591 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2021-08-27 07:36:18,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 46 states have internal predecessors, (83), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 07:36:18,591 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2021-08-27 07:36:18,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-27 07:36:18,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:36:18,594 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:36:18,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-27 07:36:18,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:36:18,833 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:36:18,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:36:18,834 INFO L82 PathProgramCache]: Analyzing trace with hash -713295800, now seen corresponding path program 1 times [2021-08-27 07:36:18,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:36:18,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050177194] [2021-08-27 07:36:18,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:36:18,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:36:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:36:18,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:36:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:36:18,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:36:18,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:36:19,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-08-27 07:36:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:36:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:36:19,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:36:19,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050177194] [2021-08-27 07:36:19,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050177194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:36:19,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560061294] [2021-08-27 07:36:19,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:36:19,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:36:19,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:36:19,975 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:36:20,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-27 07:36:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:36:20,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-27 07:36:20,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:36:20,996 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-08-27 07:36:20,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 26 [2021-08-27 07:36:21,158 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-27 07:36:21,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-08-27 07:36:21,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-27 07:36:21,339 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 07:36:21,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 38 [2021-08-27 07:36:21,549 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-08-27 07:36:21,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 48 [2021-08-27 07:36:21,660 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-08-27 07:36:21,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 72 [2021-08-27 07:36:22,118 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-08-27 07:36:22,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 80 [2021-08-27 07:36:22,122 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-08-27 07:36:22,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 59 [2021-08-27 07:36:26,875 INFO L354 Elim1Store]: treesize reduction 350, result has 32.6 percent of original size [2021-08-27 07:36:26,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 174 treesize of output 260 [2021-08-27 07:36:26,931 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-08-27 07:36:26,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 230 treesize of output 227 [2021-08-27 07:36:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:36:27,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560061294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:36:27,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:36:27,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 50 [2021-08-27 07:36:27,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752290121] [2021-08-27 07:36:27,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-27 07:36:27,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:36:27,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-27 07:36:27,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2414, Unknown=0, NotChecked=0, Total=2550 [2021-08-27 07:36:27,497 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand has 51 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 46 states have internal predecessors, (83), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 07:36:44,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:36:44,138 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2021-08-27 07:36:44,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-27 07:36:44,139 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 46 states have internal predecessors, (83), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2021-08-27 07:36:44,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:36:44,139 INFO L225 Difference]: With dead ends: 159 [2021-08-27 07:36:44,139 INFO L226 Difference]: Without dead ends: 143 [2021-08-27 07:36:44,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2113 ImplicationChecksByTransitivity, 19009.8ms TimeCoverageRelationStatistics Valid=575, Invalid=8736, Unknown=1, NotChecked=0, Total=9312 [2021-08-27 07:36:44,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-08-27 07:36:44,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 120. [2021-08-27 07:36:44,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 109 states have (on average 1.0825688073394495) internal successors, (118), 110 states have internal predecessors, (118), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-27 07:36:44,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2021-08-27 07:36:44,143 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 50 [2021-08-27 07:36:44,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:36:44,143 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2021-08-27 07:36:44,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 46 states have internal predecessors, (83), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 07:36:44,143 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2021-08-27 07:36:44,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-27 07:36:44,143 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:36:44,143 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:36:44,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-27 07:36:44,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-27 07:36:44,353 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:36:44,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:36:44,353 INFO L82 PathProgramCache]: Analyzing trace with hash -816818038, now seen corresponding path program 1 times [2021-08-27 07:36:44,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:36:44,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174826938] [2021-08-27 07:36:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:36:44,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:36:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:36:44,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:36:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:36:44,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:36:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:36:44,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-08-27 07:36:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:36:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:36:45,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:36:45,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174826938] [2021-08-27 07:36:45,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174826938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:36:45,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212701239] [2021-08-27 07:36:45,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:36:45,528 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:36:45,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:36:45,529 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:36:45,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-27 07:36:46,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:36:46,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-27 07:36:46,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:36:47,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-27 07:36:47,069 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 07:36:47,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 51 [2021-08-27 07:36:47,280 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-08-27 07:36:47,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 61 [2021-08-27 07:36:47,363 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-08-27 07:36:47,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 84 treesize of output 80 [2021-08-27 07:36:47,677 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-08-27 07:36:47,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 70 [2021-08-27 07:36:51,708 INFO L354 Elim1Store]: treesize reduction 348, result has 32.9 percent of original size [2021-08-27 07:36:51,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 227 treesize of output 287 [2021-08-27 07:36:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:36:53,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212701239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:36:53,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:36:53,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-08-27 07:36:53,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323132645] [2021-08-27 07:36:53,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-27 07:36:53,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:36:53,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-27 07:36:53,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2709, Unknown=0, NotChecked=0, Total=2862 [2021-08-27 07:36:53,028 INFO L87 Difference]: Start difference. First operand 120 states and 129 transitions. Second operand has 54 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 49 states have internal predecessors, (86), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 07:37:03,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:37:03,643 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2021-08-27 07:37:03,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-27 07:37:03,645 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 49 states have internal predecessors, (86), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 51 [2021-08-27 07:37:03,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:37:03,646 INFO L225 Difference]: With dead ends: 156 [2021-08-27 07:37:03,646 INFO L226 Difference]: Without dead ends: 146 [2021-08-27 07:37:03,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1566 ImplicationChecksByTransitivity, 12863.4ms TimeCoverageRelationStatistics Valid=414, Invalid=6558, Unknown=0, NotChecked=0, Total=6972 [2021-08-27 07:37:03,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-08-27 07:37:03,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2021-08-27 07:37:03,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 126 states have (on average 1.0793650793650793) internal successors, (136), 128 states have internal predecessors, (136), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-08-27 07:37:03,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 152 transitions. [2021-08-27 07:37:03,649 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 152 transitions. Word has length 51 [2021-08-27 07:37:03,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:37:03,649 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 152 transitions. [2021-08-27 07:37:03,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 49 states have internal predecessors, (86), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 07:37:03,650 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 152 transitions. [2021-08-27 07:37:03,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-27 07:37:03,650 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:37:03,650 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:37:03,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-27 07:37:03,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:37:03,876 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:37:03,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:37:03,877 INFO L82 PathProgramCache]: Analyzing trace with hash -2021950276, now seen corresponding path program 1 times [2021-08-27 07:37:03,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:37:03,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749435924] [2021-08-27 07:37:03,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:37:03,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:37:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:37:04,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:37:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:37:04,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:37:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:37:04,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-08-27 07:37:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:37:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:37:05,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:37:05,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749435924] [2021-08-27 07:37:05,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749435924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:37:05,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871220113] [2021-08-27 07:37:05,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:37:05,222 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:37:05,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:37:05,223 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:37:05,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-27 07:37:06,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:37:06,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-27 07:37:06,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:37:06,457 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-08-27 07:37:06,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 26 [2021-08-27 07:37:06,637 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-27 07:37:06,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-08-27 07:37:06,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-27 07:37:06,803 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 07:37:06,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 38 [2021-08-27 07:37:07,033 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-08-27 07:37:07,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 48 [2021-08-27 07:37:07,150 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-08-27 07:37:07,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 72 [2021-08-27 07:37:07,613 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-08-27 07:37:07,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 80 [2021-08-27 07:37:07,619 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-08-27 07:37:07,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 59 [2021-08-27 07:37:12,935 INFO L354 Elim1Store]: treesize reduction 348, result has 32.9 percent of original size [2021-08-27 07:37:12,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 174 treesize of output 262 [2021-08-27 07:37:12,963 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-08-27 07:37:12,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 232 treesize of output 229 [2021-08-27 07:37:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:37:15,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871220113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:37:15,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:37:15,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 51 [2021-08-27 07:37:15,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453284798] [2021-08-27 07:37:15,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-27 07:37:15,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:37:15,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-27 07:37:15,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2518, Unknown=0, NotChecked=0, Total=2652 [2021-08-27 07:37:15,368 INFO L87 Difference]: Start difference. First operand 140 states and 152 transitions. Second operand has 52 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 47 states have internal predecessors, (84), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 07:37:35,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:37:35,590 INFO L93 Difference]: Finished difference Result 172 states and 185 transitions. [2021-08-27 07:37:35,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-27 07:37:35,591 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 47 states have internal predecessors, (84), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 51 [2021-08-27 07:37:35,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:37:35,591 INFO L225 Difference]: With dead ends: 172 [2021-08-27 07:37:35,591 INFO L226 Difference]: Without dead ends: 156 [2021-08-27 07:37:35,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 23982.7ms TimeCoverageRelationStatistics Valid=562, Invalid=9140, Unknown=0, NotChecked=0, Total=9702 [2021-08-27 07:37:35,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-08-27 07:37:35,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 141. [2021-08-27 07:37:35,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 127 states have (on average 1.078740157480315) internal successors, (137), 129 states have internal predecessors, (137), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-08-27 07:37:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 153 transitions. [2021-08-27 07:37:35,595 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 153 transitions. Word has length 51 [2021-08-27 07:37:35,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:37:35,595 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 153 transitions. [2021-08-27 07:37:35,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 47 states have internal predecessors, (84), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 07:37:35,595 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 153 transitions. [2021-08-27 07:37:35,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-27 07:37:35,596 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:37:35,596 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:37:35,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-08-27 07:37:35,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:37:35,817 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:37:35,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:37:35,817 INFO L82 PathProgramCache]: Analyzing trace with hash 539653616, now seen corresponding path program 1 times [2021-08-27 07:37:35,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:37:35,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776091309] [2021-08-27 07:37:35,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:37:35,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:37:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:37:35,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:37:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:37:35,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:37:35,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:37:36,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-08-27 07:37:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:37:37,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:37:37,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:37:37,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776091309] [2021-08-27 07:37:37,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776091309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:37:37,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225078042] [2021-08-27 07:37:37,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:37:37,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:37:37,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:37:37,116 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:37:37,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-27 07:37:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:37:38,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-27 07:37:38,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:37:38,477 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-08-27 07:37:38,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 26 [2021-08-27 07:37:38,685 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-27 07:37:38,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-08-27 07:37:38,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-27 07:37:38,871 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 07:37:38,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 38 [2021-08-27 07:37:39,090 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-08-27 07:37:39,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 48 [2021-08-27 07:37:39,202 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-08-27 07:37:39,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 72 [2021-08-27 07:37:39,617 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-08-27 07:37:39,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 80 [2021-08-27 07:37:39,622 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-08-27 07:37:39,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 59 [2021-08-27 07:37:44,091 INFO L354 Elim1Store]: treesize reduction 350, result has 32.6 percent of original size [2021-08-27 07:37:44,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 174 treesize of output 260 [2021-08-27 07:37:44,117 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-08-27 07:37:44,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 230 treesize of output 227 [2021-08-27 07:38:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:38:31,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225078042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:38:31,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:38:31,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 51 [2021-08-27 07:38:31,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863807566] [2021-08-27 07:38:31,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-27 07:38:31,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:38:31,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-27 07:38:31,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2518, Unknown=0, NotChecked=0, Total=2652 [2021-08-27 07:38:31,402 INFO L87 Difference]: Start difference. First operand 141 states and 153 transitions. Second operand has 52 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 47 states have internal predecessors, (84), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 07:38:42,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:38:42,759 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2021-08-27 07:38:42,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-27 07:38:42,760 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 47 states have internal predecessors, (84), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 51 [2021-08-27 07:38:42,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:38:42,761 INFO L225 Difference]: With dead ends: 169 [2021-08-27 07:38:42,761 INFO L226 Difference]: Without dead ends: 157 [2021-08-27 07:38:42,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 14510.3ms TimeCoverageRelationStatistics Valid=564, Invalid=9138, Unknown=0, NotChecked=0, Total=9702 [2021-08-27 07:38:42,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-08-27 07:38:42,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 145. [2021-08-27 07:38:42,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 131 states have (on average 1.0763358778625953) internal successors, (141), 133 states have internal predecessors, (141), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-08-27 07:38:42,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 157 transitions. [2021-08-27 07:38:42,766 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 157 transitions. Word has length 51 [2021-08-27 07:38:42,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:38:42,766 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 157 transitions. [2021-08-27 07:38:42,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 47 states have internal predecessors, (84), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 07:38:42,766 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 157 transitions. [2021-08-27 07:38:42,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-27 07:38:42,767 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:38:42,767 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:38:42,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-27 07:38:42,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:38:42,967 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:38:42,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:38:42,967 INFO L82 PathProgramCache]: Analyzing trace with hash -665478622, now seen corresponding path program 1 times [2021-08-27 07:38:42,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:38:42,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194153315] [2021-08-27 07:38:42,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:38:42,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:38:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:38:43,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:38:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:38:43,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:38:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:38:43,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-08-27 07:38:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:38:44,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:38:44,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:38:44,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194153315] [2021-08-27 07:38:44,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194153315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:38:44,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987957679] [2021-08-27 07:38:44,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:38:44,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:38:44,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:38:44,496 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:38:44,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-27 07:38:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:38:45,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-27 07:38:45,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:38:45,966 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-08-27 07:38:45,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 26 [2021-08-27 07:38:46,131 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-27 07:38:46,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-08-27 07:38:46,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-27 07:38:46,312 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 07:38:46,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 38 [2021-08-27 07:38:46,523 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-08-27 07:38:46,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 48 [2021-08-27 07:38:46,633 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-08-27 07:38:46,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 72 [2021-08-27 07:38:47,067 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-08-27 07:38:47,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 82 [2021-08-27 07:38:47,071 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-08-27 07:38:47,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 62 [2021-08-27 07:38:53,347 INFO L354 Elim1Store]: treesize reduction 348, result has 32.9 percent of original size [2021-08-27 07:38:53,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 174 treesize of output 262 [2021-08-27 07:38:53,375 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-08-27 07:38:53,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 232 treesize of output 229 [2021-08-27 07:38:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:38:57,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987957679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:38:57,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:38:57,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 50 [2021-08-27 07:38:57,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431210193] [2021-08-27 07:38:57,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-27 07:38:57,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:38:57,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-27 07:38:57,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2419, Unknown=0, NotChecked=0, Total=2550 [2021-08-27 07:38:57,784 INFO L87 Difference]: Start difference. First operand 145 states and 157 transitions. Second operand has 51 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 46 states have internal predecessors, (85), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 07:39:11,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:39:11,076 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2021-08-27 07:39:11,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-27 07:39:11,077 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 46 states have internal predecessors, (85), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 51 [2021-08-27 07:39:11,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:39:11,077 INFO L225 Difference]: With dead ends: 164 [2021-08-27 07:39:11,077 INFO L226 Difference]: Without dead ends: 134 [2021-08-27 07:39:11,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2094 ImplicationChecksByTransitivity, 17620.9ms TimeCoverageRelationStatistics Valid=562, Invalid=8944, Unknown=0, NotChecked=0, Total=9506 [2021-08-27 07:39:11,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-08-27 07:39:11,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 125. [2021-08-27 07:39:11,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 114 states have (on average 1.0701754385964912) internal successors, (122), 115 states have internal predecessors, (122), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-27 07:39:11,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 133 transitions. [2021-08-27 07:39:11,081 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 133 transitions. Word has length 51 [2021-08-27 07:39:11,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:39:11,081 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 133 transitions. [2021-08-27 07:39:11,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 46 states have internal predecessors, (85), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 07:39:11,081 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 133 transitions. [2021-08-27 07:39:11,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-27 07:39:11,081 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:39:11,081 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:39:11,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-27 07:39:11,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:39:11,297 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 07:39:11,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:39:11,297 INFO L82 PathProgramCache]: Analyzing trace with hash 61109274, now seen corresponding path program 2 times [2021-08-27 07:39:11,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:39:11,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877651768] [2021-08-27 07:39:11,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:39:11,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:39:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:39:11,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:39:11,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:39:11,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:39:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:39:11,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-08-27 07:39:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:39:11,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:39:11,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:39:11,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877651768] [2021-08-27 07:39:11,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877651768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:39:11,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829464476] [2021-08-27 07:39:11,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 07:39:11,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:39:11,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:39:11,411 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:39:11,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-27 07:39:12,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 07:39:12,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 07:39:12,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 07:39:12,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:39:13,097 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:39:13,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829464476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:39:13,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:39:13,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2021-08-27 07:39:13,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626643002] [2021-08-27 07:39:13,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 07:39:13,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:39:13,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 07:39:13,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-27 07:39:13,099 INFO L87 Difference]: Start difference. First operand 125 states and 133 transitions. Second operand has 11 states, 10 states have (on average 7.8) internal successors, (78), 8 states have internal predecessors, (78), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 07:39:13,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:39:13,164 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-08-27 07:39:13,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 07:39:13,164 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.8) internal successors, (78), 8 states have internal predecessors, (78), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 56 [2021-08-27 07:39:13,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:39:13,164 INFO L225 Difference]: With dead ends: 48 [2021-08-27 07:39:13,164 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 07:39:13,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-27 07:39:13,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 07:39:13,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 07:39:13,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 07:39:13,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 07:39:13,165 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2021-08-27 07:39:13,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:39:13,165 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 07:39:13,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.8) internal successors, (78), 8 states have internal predecessors, (78), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 07:39:13,165 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 07:39:13,165 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 07:39:13,167 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION [2021-08-27 07:39:13,167 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION [2021-08-27 07:39:13,167 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION [2021-08-27 07:39:13,168 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr3REQUIRES_VIOLATION [2021-08-27 07:39:13,168 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr4ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,168 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr5ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,168 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr6ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,168 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr7ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,168 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr8ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,168 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr9ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,168 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr10ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,169 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr11ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,169 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr12ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,169 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr13ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,169 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr14ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,169 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr15ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,169 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr16ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,169 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr17ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,169 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr18ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,170 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr19ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,170 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr20ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,170 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr21ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,170 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr22ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,170 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr23ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,170 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr24ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,170 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr25ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,170 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr26ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,171 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr27ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,171 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr28ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,171 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr29ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,171 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr30ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,171 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr31ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,171 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr32ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,171 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr33ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,171 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr34ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,171 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr35ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,172 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr36ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,172 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr37ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,172 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr38ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,172 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr39ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,172 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr40ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,172 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr41ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,172 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr42ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,172 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr43ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,173 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr44ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,173 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr45ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,173 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr46ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,173 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr47ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,173 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr48ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:39:13,173 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr0REQUIRES_VIOLATION [2021-08-27 07:39:13,173 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr1REQUIRES_VIOLATION [2021-08-27 07:39:13,173 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr2REQUIRES_VIOLATION [2021-08-27 07:39:13,173 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr3REQUIRES_VIOLATION [2021-08-27 07:39:13,173 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr4REQUIRES_VIOLATION [2021-08-27 07:39:13,174 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr5REQUIRES_VIOLATION [2021-08-27 07:39:13,174 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr6REQUIRES_VIOLATION [2021-08-27 07:39:13,174 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr7REQUIRES_VIOLATION [2021-08-27 07:39:13,174 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr8REQUIRES_VIOLATION [2021-08-27 07:39:13,174 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr9REQUIRES_VIOLATION [2021-08-27 07:39:13,174 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr10REQUIRES_VIOLATION [2021-08-27 07:39:13,174 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr11REQUIRES_VIOLATION [2021-08-27 07:39:13,174 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 07:39:13,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-27 07:39:13,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-27 07:39:13,392 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 07:39:13,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 07:39:13 BoogieIcfgContainer [2021-08-27 07:39:13,394 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 07:39:13,395 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 07:39:13,395 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 07:39:13,395 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 07:39:13,395 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:34:19" (3/4) ... [2021-08-27 07:39:13,397 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 07:39:13,402 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 07:39:13,402 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2021-08-27 07:39:13,402 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-08-27 07:39:13,402 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure _destroy_in_nondeterministic_order [2021-08-27 07:39:13,402 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-08-27 07:39:13,403 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 07:39:13,403 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_circular_create [2021-08-27 07:39:13,409 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-08-27 07:39:13,409 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-27 07:39:13,409 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 07:39:13,410 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 07:39:13,451 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 07:39:13,452 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 07:39:13,452 INFO L168 Benchmark]: Toolchain (without parser) took 295050.18 ms. Allocated memory was 56.6 MB in the beginning and 977.3 MB in the end (delta: 920.6 MB). Free memory was 34.2 MB in the beginning and 377.8 MB in the end (delta: -343.6 MB). Peak memory consumption was 577.6 MB. Max. memory is 16.1 GB. [2021-08-27 07:39:13,453 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 56.6 MB. Free memory was 38.7 MB in the beginning and 38.6 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 07:39:13,453 INFO L168 Benchmark]: CACSL2BoogieTranslator took 377.20 ms. Allocated memory was 56.6 MB in the beginning and 75.5 MB in the end (delta: 18.9 MB). Free memory was 33.9 MB in the beginning and 52.5 MB in the end (delta: -18.6 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. [2021-08-27 07:39:13,455 INFO L168 Benchmark]: Boogie Preprocessor took 72.65 ms. Allocated memory is still 75.5 MB. Free memory was 52.5 MB in the beginning and 49.7 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 07:39:13,455 INFO L168 Benchmark]: RCFGBuilder took 771.60 ms. Allocated memory is still 75.5 MB. Free memory was 49.7 MB in the beginning and 51.2 MB in the end (delta: -1.6 MB). Peak memory consumption was 17.4 MB. Max. memory is 16.1 GB. [2021-08-27 07:39:13,455 INFO L168 Benchmark]: TraceAbstraction took 293764.71 ms. Allocated memory was 75.5 MB in the beginning and 977.3 MB in the end (delta: 901.8 MB). Free memory was 50.8 MB in the beginning and 382.5 MB in the end (delta: -331.7 MB). Peak memory consumption was 570.8 MB. Max. memory is 16.1 GB. [2021-08-27 07:39:13,455 INFO L168 Benchmark]: Witness Printer took 57.23 ms. Allocated memory is still 977.3 MB. Free memory was 382.5 MB in the beginning and 377.8 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 07:39:13,457 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 56.6 MB. Free memory was 38.7 MB in the beginning and 38.6 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 377.20 ms. Allocated memory was 56.6 MB in the beginning and 75.5 MB in the end (delta: 18.9 MB). Free memory was 33.9 MB in the beginning and 52.5 MB in the end (delta: -18.6 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 72.65 ms. Allocated memory is still 75.5 MB. Free memory was 52.5 MB in the beginning and 49.7 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 771.60 ms. Allocated memory is still 75.5 MB. Free memory was 49.7 MB in the beginning and 51.2 MB in the end (delta: -1.6 MB). Peak memory consumption was 17.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 293764.71 ms. Allocated memory was 75.5 MB in the beginning and 977.3 MB in the end (delta: 901.8 MB). Free memory was 50.8 MB in the beginning and 382.5 MB in the end (delta: -331.7 MB). Peak memory consumption was 570.8 MB. Max. memory is 16.1 GB. * Witness Printer took 57.23 ms. Allocated memory is still 977.3 MB. Free memory was 382.5 MB in the beginning and 377.8 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 586]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 586]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 587]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 587]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 589]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 589]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 589]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 591]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 591]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 591]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 592]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 592]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 592]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 598]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 598]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 598]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 601]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 601]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 601]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 604]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 604]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 604]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 607]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 607]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 607]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 610]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 610]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 610]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 612]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 612]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 612]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 613]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 613]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 613]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 568]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 568]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 569]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 569]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 576]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 576]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 577]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 577]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 581]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 581]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 582]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 582]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 617]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 159 locations, 62 error locations. Started 1 CEGAR loops. OverallTime: 293732.5ms, OverallIterations: 34, TraceHistogramMax: 3, EmptinessCheckTime: 23.6ms, AutomataDifference: 148512.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2671 SDtfs, 5843 SDslu, 18643 SDs, 0 SdLazy, 39551 SolverSat, 1521 SolverUnsat, 71 SolverUnknown, 0 SolverNotchecked, 50435.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2007 GetRequests, 669 SyntacticMatches, 25 SemanticMatches, 1313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17729 ImplicationChecksByTransitivity, 137164.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=152occurred in iteration=0, InterpolantAutomatonStates: 718, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 153.1ms AutomataMinimizationTime, 34 MinimizatonAttempts, 132 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 230.4ms SsaConstructionTime, 848.6ms SatisfiabilityAnalysisTime, 127251.8ms InterpolantComputationTime, 2081 NumberOfCodeBlocks, 2081 NumberOfCodeBlocksAsserted, 55 NumberOfCheckSat, 2027 ConstructedInterpolants, 353 QuantifiedInterpolants, 49585 SizeOfPredicates, 258 NumberOfNonLiveVariables, 4008 ConjunctsInSsa, 826 ConjunctsInUnsatCore, 54 InterpolantComputations, 14 PerfectInterpolantSequences, 57/327 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 62 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-27 07:39:13,700 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-08-27 07:39:13,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...