./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/add_last-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ff03de63 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/array-memsafety/add_last-alloca-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 870a7e5617be5a547f8d530603b5c27ad6cbb74bb05a83654285fee7bbb92753 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 17:58:41,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 17:58:41,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 17:58:41,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 17:58:41,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 17:58:41,484 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 17:58:41,486 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 17:58:41,491 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 17:58:41,492 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 17:58:41,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 17:58:41,494 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 17:58:41,496 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 17:58:41,497 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 17:58:41,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 17:58:41,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 17:58:41,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 17:58:41,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 17:58:41,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 17:58:41,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 17:58:41,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 17:58:41,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 17:58:41,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 17:58:41,520 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 17:58:41,521 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 17:58:41,524 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 17:58:41,526 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 17:58:41,526 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 17:58:41,527 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 17:58:41,528 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 17:58:41,529 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 17:58:41,529 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 17:58:41,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 17:58:41,531 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 17:58:41,532 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 17:58:41,533 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 17:58:41,533 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 17:58:41,534 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 17:58:41,534 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 17:58:41,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 17:58:41,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 17:58:41,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 17:58:41,537 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-21 17:58:41,562 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 17:58:41,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 17:58:41,565 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 17:58:41,565 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 17:58:41,566 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 17:58:41,566 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 17:58:41,567 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 17:58:41,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 17:58:41,567 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 17:58:41,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 17:58:41,569 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 17:58:41,569 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 17:58:41,569 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 17:58:41,569 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 17:58:41,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 17:58:41,570 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 17:58:41,570 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 17:58:41,570 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 17:58:41,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 17:58:41,570 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 17:58:41,570 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 17:58:41,571 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 17:58:41,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 17:58:41,571 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 17:58:41,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 17:58:41,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 17:58:41,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 17:58:41,572 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 17:58:41,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 17:58:41,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 17:58:41,573 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 17:58:41,573 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 870a7e5617be5a547f8d530603b5c27ad6cbb74bb05a83654285fee7bbb92753 [2021-12-21 17:58:41,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 17:58:41,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 17:58:41,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 17:58:41,802 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 17:58:41,803 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 17:58:41,817 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/add_last-alloca-1.i [2021-12-21 17:58:41,879 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff3a6e14a/2a674018205e433199cc385ff63ed053/FLAGd5e5b2b8b [2021-12-21 17:58:42,314 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 17:58:42,315 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/add_last-alloca-1.i [2021-12-21 17:58:42,324 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff3a6e14a/2a674018205e433199cc385ff63ed053/FLAGd5e5b2b8b [2021-12-21 17:58:42,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff3a6e14a/2a674018205e433199cc385ff63ed053 [2021-12-21 17:58:42,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 17:58:42,671 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 17:58:42,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 17:58:42,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 17:58:42,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 17:58:42,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 05:58:42" (1/1) ... [2021-12-21 17:58:42,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30659b52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:58:42, skipping insertion in model container [2021-12-21 17:58:42,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 05:58:42" (1/1) ... [2021-12-21 17:58:42,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 17:58:42,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 17:58:42,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 17:58:42,957 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 17:58:42,986 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 17:58:43,006 INFO L208 MainTranslator]: Completed translation [2021-12-21 17:58:43,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:58:43 WrapperNode [2021-12-21 17:58:43,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 17:58:43,008 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 17:58:43,008 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 17:58:43,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 17:58:43,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:58:43" (1/1) ... [2021-12-21 17:58:43,044 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:58:43" (1/1) ... [2021-12-21 17:58:43,066 INFO L137 Inliner]: procedures = 115, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2021-12-21 17:58:43,067 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 17:58:43,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 17:58:43,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 17:58:43,068 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 17:58:43,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:58:43" (1/1) ... [2021-12-21 17:58:43,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:58:43" (1/1) ... [2021-12-21 17:58:43,081 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:58:43" (1/1) ... [2021-12-21 17:58:43,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:58:43" (1/1) ... [2021-12-21 17:58:43,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:58:43" (1/1) ... [2021-12-21 17:58:43,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:58:43" (1/1) ... [2021-12-21 17:58:43,102 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:58:43" (1/1) ... [2021-12-21 17:58:43,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 17:58:43,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 17:58:43,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 17:58:43,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 17:58:43,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:58:43" (1/1) ... [2021-12-21 17:58:43,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 17:58:43,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:58:43,140 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 17:58:43,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 17:58:43,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 17:58:43,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 17:58:43,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 17:58:43,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 17:58:43,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 17:58:43,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 17:58:43,249 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 17:58:43,250 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 17:58:43,386 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 17:58:43,392 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 17:58:43,392 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 17:58:43,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 05:58:43 BoogieIcfgContainer [2021-12-21 17:58:43,394 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 17:58:43,397 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 17:58:43,397 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 17:58:43,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 17:58:43,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 05:58:42" (1/3) ... [2021-12-21 17:58:43,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c2c2fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 05:58:43, skipping insertion in model container [2021-12-21 17:58:43,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:58:43" (2/3) ... [2021-12-21 17:58:43,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c2c2fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 05:58:43, skipping insertion in model container [2021-12-21 17:58:43,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 05:58:43" (3/3) ... [2021-12-21 17:58:43,408 INFO L111 eAbstractionObserver]: Analyzing ICFG add_last-alloca-1.i [2021-12-21 17:58:43,412 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 17:58:43,420 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-12-21 17:58:43,470 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 17:58:43,485 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 17:58:43,485 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-12-21 17:58:43,500 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 2.0) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:43,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 17:58:43,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:58:43,506 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 17:58:43,507 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:58:43,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:58:43,512 INFO L85 PathProgramCache]: Analyzing trace with hash 889508760, now seen corresponding path program 1 times [2021-12-21 17:58:43,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:58:43,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475979631] [2021-12-21 17:58:43,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:58:43,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:58:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:58:43,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:43,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:58:43,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475979631] [2021-12-21 17:58:43,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475979631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 17:58:43,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 17:58:43,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 17:58:43,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156046780] [2021-12-21 17:58:43,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 17:58:43,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 17:58:43,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:58:43,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 17:58:43,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 17:58:43,746 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 2.0) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:43,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:58:43,806 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-12-21 17:58:43,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 17:58:43,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-21 17:58:43,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:58:43,814 INFO L225 Difference]: With dead ends: 33 [2021-12-21 17:58:43,814 INFO L226 Difference]: Without dead ends: 31 [2021-12-21 17:58:43,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 17:58:43,820 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 62 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 17:58:43,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 27 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 17:58:43,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-21 17:58:43,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-21 17:58:43,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:43,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-12-21 17:58:43,857 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 6 [2021-12-21 17:58:43,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:58:43,858 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-12-21 17:58:43,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:43,859 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-12-21 17:58:43,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 17:58:43,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:58:43,859 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:58:43,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 17:58:43,860 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:58:43,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:58:43,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1804968471, now seen corresponding path program 1 times [2021-12-21 17:58:43,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:58:43,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158842954] [2021-12-21 17:58:43,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:58:43,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:58:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:58:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:43,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:58:43,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158842954] [2021-12-21 17:58:43,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158842954] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 17:58:43,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 17:58:43,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 17:58:43,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009262572] [2021-12-21 17:58:43,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 17:58:43,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 17:58:43,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:58:43,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 17:58:43,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 17:58:43,951 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:43,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:58:43,986 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-12-21 17:58:43,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 17:58:43,987 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-21 17:58:43,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:58:43,988 INFO L225 Difference]: With dead ends: 37 [2021-12-21 17:58:43,990 INFO L226 Difference]: Without dead ends: 37 [2021-12-21 17:58:43,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 17:58:43,995 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 38 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 17:58:43,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 42 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 17:58:43,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-21 17:58:44,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2021-12-21 17:58:44,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:44,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-12-21 17:58:44,004 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 7 [2021-12-21 17:58:44,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:58:44,005 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-12-21 17:58:44,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:44,005 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-12-21 17:58:44,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 17:58:44,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:58:44,006 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:58:44,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 17:58:44,007 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:58:44,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:58:44,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1804968521, now seen corresponding path program 1 times [2021-12-21 17:58:44,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:58:44,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403977337] [2021-12-21 17:58:44,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:58:44,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:58:44,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:58:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:44,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:58:44,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403977337] [2021-12-21 17:58:44,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403977337] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 17:58:44,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 17:58:44,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 17:58:44,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151872097] [2021-12-21 17:58:44,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 17:58:44,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 17:58:44,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:58:44,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 17:58:44,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 17:58:44,090 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:44,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:58:44,121 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-12-21 17:58:44,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 17:58:44,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-21 17:58:44,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:58:44,123 INFO L225 Difference]: With dead ends: 29 [2021-12-21 17:58:44,123 INFO L226 Difference]: Without dead ends: 29 [2021-12-21 17:58:44,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 17:58:44,129 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 17:58:44,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 18 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 17:58:44,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-21 17:58:44,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-21 17:58:44,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.631578947368421) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:44,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-12-21 17:58:44,140 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 7 [2021-12-21 17:58:44,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:58:44,140 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-12-21 17:58:44,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:44,141 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-12-21 17:58:44,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 17:58:44,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:58:44,142 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:58:44,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 17:58:44,143 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:58:44,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:58:44,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1804968522, now seen corresponding path program 1 times [2021-12-21 17:58:44,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:58:44,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179693444] [2021-12-21 17:58:44,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:58:44,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:58:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:58:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:44,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:58:44,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179693444] [2021-12-21 17:58:44,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179693444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 17:58:44,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 17:58:44,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 17:58:44,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662315687] [2021-12-21 17:58:44,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 17:58:44,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 17:58:44,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:58:44,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 17:58:44,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-21 17:58:44,294 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:44,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:58:44,338 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-12-21 17:58:44,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 17:58:44,339 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-21 17:58:44,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:58:44,340 INFO L225 Difference]: With dead ends: 30 [2021-12-21 17:58:44,340 INFO L226 Difference]: Without dead ends: 30 [2021-12-21 17:58:44,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-21 17:58:44,341 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 17:58:44,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 36 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 17:58:44,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-21 17:58:44,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-12-21 17:58:44,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:44,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-12-21 17:58:44,344 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 7 [2021-12-21 17:58:44,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:58:44,345 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-12-21 17:58:44,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:44,345 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-12-21 17:58:44,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 17:58:44,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:58:44,346 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:58:44,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 17:58:44,346 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:58:44,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:58:44,347 INFO L85 PathProgramCache]: Analyzing trace with hash -2013824102, now seen corresponding path program 1 times [2021-12-21 17:58:44,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:58:44,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097842926] [2021-12-21 17:58:44,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:58:44,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:58:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:58:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 17:58:44,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:58:44,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097842926] [2021-12-21 17:58:44,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097842926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 17:58:44,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 17:58:44,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 17:58:44,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544244467] [2021-12-21 17:58:44,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 17:58:44,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 17:58:44,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:58:44,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 17:58:44,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 17:58:44,396 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:44,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:58:44,431 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-12-21 17:58:44,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 17:58:44,431 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-21 17:58:44,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:58:44,433 INFO L225 Difference]: With dead ends: 25 [2021-12-21 17:58:44,433 INFO L226 Difference]: Without dead ends: 25 [2021-12-21 17:58:44,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 17:58:44,434 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 17:58:44,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 16 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 17:58:44,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-21 17:58:44,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-21 17:58:44,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:44,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-12-21 17:58:44,438 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 11 [2021-12-21 17:58:44,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:58:44,439 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-12-21 17:58:44,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:44,439 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-12-21 17:58:44,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 17:58:44,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:58:44,440 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:58:44,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 17:58:44,440 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:58:44,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:58:44,441 INFO L85 PathProgramCache]: Analyzing trace with hash -2013824101, now seen corresponding path program 1 times [2021-12-21 17:58:44,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:58:44,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855014199] [2021-12-21 17:58:44,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:58:44,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:58:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:58:44,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 17:58:44,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:58:44,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855014199] [2021-12-21 17:58:44,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855014199] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 17:58:44,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 17:58:44,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 17:58:44,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899108497] [2021-12-21 17:58:44,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 17:58:44,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 17:58:44,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:58:44,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 17:58:44,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-21 17:58:44,530 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:44,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:58:44,583 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-12-21 17:58:44,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 17:58:44,583 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-21 17:58:44,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:58:44,585 INFO L225 Difference]: With dead ends: 35 [2021-12-21 17:58:44,585 INFO L226 Difference]: Without dead ends: 35 [2021-12-21 17:58:44,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 17:58:44,587 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 84 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 17:58:44,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 18 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 17:58:44,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-21 17:58:44,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2021-12-21 17:58:44,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:44,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-21 17:58:44,593 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 11 [2021-12-21 17:58:44,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:58:44,593 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-21 17:58:44,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:44,593 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-21 17:58:44,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 17:58:44,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:58:44,594 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:58:44,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 17:58:44,594 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:58:44,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:58:44,595 INFO L85 PathProgramCache]: Analyzing trace with hash -2013824051, now seen corresponding path program 1 times [2021-12-21 17:58:44,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:58:44,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893424921] [2021-12-21 17:58:44,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:58:44,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:58:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:58:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:44,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:58:44,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893424921] [2021-12-21 17:58:44,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893424921] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 17:58:44,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142308107] [2021-12-21 17:58:44,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:58:44,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:58:44,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:58:44,665 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) [2021-12-21 17:58:44,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 17:58:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:58:44,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 17:58:44,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:58:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:44,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 17:58:44,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142308107] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 17:58:44,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 17:58:44,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-12-21 17:58:44,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337530944] [2021-12-21 17:58:44,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 17:58:44,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 17:58:44,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:58:44,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 17:58:44,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 17:58:44,835 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:44,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:58:44,857 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-12-21 17:58:44,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 17:58:44,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-21 17:58:44,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:58:44,860 INFO L225 Difference]: With dead ends: 57 [2021-12-21 17:58:44,860 INFO L226 Difference]: Without dead ends: 57 [2021-12-21 17:58:44,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 17:58:44,862 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 32 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 17:58:44,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 36 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 17:58:44,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-21 17:58:44,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2021-12-21 17:58:44,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:44,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-12-21 17:58:44,871 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 11 [2021-12-21 17:58:44,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:58:44,872 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-12-21 17:58:44,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:44,872 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-12-21 17:58:44,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 17:58:44,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:58:44,873 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:58:44,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 17:58:45,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:58:45,092 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:58:45,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:58:45,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1333765681, now seen corresponding path program 1 times [2021-12-21 17:58:45,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:58:45,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814076560] [2021-12-21 17:58:45,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:58:45,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:58:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:58:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:45,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:58:45,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814076560] [2021-12-21 17:58:45,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814076560] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 17:58:45,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190358158] [2021-12-21 17:58:45,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:58:45,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:58:45,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:58:45,188 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) [2021-12-21 17:58:45,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 17:58:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:58:45,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 17:58:45,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:58:45,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 17:58:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:45,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 17:58:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:45,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190358158] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 17:58:45,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 17:58:45,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-21 17:58:45,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105807830] [2021-12-21 17:58:45,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 17:58:45,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 17:58:45,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:58:45,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 17:58:45,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-21 17:58:45,683 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:45,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:58:45,769 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-12-21 17:58:45,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 17:58:45,770 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-21 17:58:45,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:58:45,771 INFO L225 Difference]: With dead ends: 39 [2021-12-21 17:58:45,771 INFO L226 Difference]: Without dead ends: 39 [2021-12-21 17:58:45,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-12-21 17:58:45,772 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 17:58:45,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 34 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 17:58:45,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-21 17:58:45,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-12-21 17:58:45,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.21875) internal successors, (39), 35 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:45,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-12-21 17:58:45,784 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 11 [2021-12-21 17:58:45,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:58:45,785 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-12-21 17:58:45,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:45,785 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-12-21 17:58:45,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-21 17:58:45,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:58:45,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:58:45,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 17:58:46,005 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,SelfDestructingSolverStorable7 [2021-12-21 17:58:46,006 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:58:46,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:58:46,006 INFO L85 PathProgramCache]: Analyzing trace with hash -2109737472, now seen corresponding path program 1 times [2021-12-21 17:58:46,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:58:46,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395069903] [2021-12-21 17:58:46,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:58:46,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:58:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:58:46,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 17:58:46,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:58:46,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395069903] [2021-12-21 17:58:46,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395069903] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 17:58:46,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 17:58:46,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 17:58:46,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43804622] [2021-12-21 17:58:46,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 17:58:46,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 17:58:46,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:58:46,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 17:58:46,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 17:58:46,079 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:46,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:58:46,093 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-12-21 17:58:46,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 17:58:46,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-21 17:58:46,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:58:46,094 INFO L225 Difference]: With dead ends: 35 [2021-12-21 17:58:46,095 INFO L226 Difference]: Without dead ends: 33 [2021-12-21 17:58:46,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 17:58:46,096 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 17:58:46,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 28 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 17:58:46,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-21 17:58:46,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-21 17:58:46,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:46,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-12-21 17:58:46,100 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 15 [2021-12-21 17:58:46,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:58:46,100 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-12-21 17:58:46,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:46,100 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-12-21 17:58:46,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 17:58:46,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:58:46,100 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:58:46,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 17:58:46,101 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:58:46,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:58:46,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1407328063, now seen corresponding path program 1 times [2021-12-21 17:58:46,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:58:46,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125535630] [2021-12-21 17:58:46,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:58:46,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:58:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:58:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 17:58:46,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:58:46,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125535630] [2021-12-21 17:58:46,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125535630] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 17:58:46,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 17:58:46,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 17:58:46,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562272001] [2021-12-21 17:58:46,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 17:58:46,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 17:58:46,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:58:46,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 17:58:46,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-21 17:58:46,389 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:46,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:58:46,425 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-12-21 17:58:46,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 17:58:46,425 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-21 17:58:46,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:58:46,426 INFO L225 Difference]: With dead ends: 36 [2021-12-21 17:58:46,426 INFO L226 Difference]: Without dead ends: 26 [2021-12-21 17:58:46,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-12-21 17:58:46,427 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 17:58:46,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 31 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 17:58:46,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-21 17:58:46,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-21 17:58:46,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:46,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-12-21 17:58:46,429 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 18 [2021-12-21 17:58:46,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:58:46,429 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-12-21 17:58:46,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:46,430 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-12-21 17:58:46,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 17:58:46,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:58:46,430 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:58:46,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 17:58:46,431 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:58:46,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:58:46,431 INFO L85 PathProgramCache]: Analyzing trace with hash 386259709, now seen corresponding path program 1 times [2021-12-21 17:58:46,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:58:46,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862697579] [2021-12-21 17:58:46,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:58:46,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:58:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:58:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:46,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:58:46,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862697579] [2021-12-21 17:58:46,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862697579] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 17:58:46,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917555539] [2021-12-21 17:58:46,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:58:46,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:58:46,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:58:46,764 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) [2021-12-21 17:58:46,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 17:58:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:58:46,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 17:58:46,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:58:46,885 INFO L387 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 15 treesize of output 11 [2021-12-21 17:58:46,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 17:58:46,994 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 17:58:46,994 INFO L387 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 19 treesize of output 10 [2021-12-21 17:58:47,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:47,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 17:58:47,093 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 17:58:47,093 INFO L387 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 68 treesize of output 70 [2021-12-21 17:58:47,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2021-12-21 17:58:47,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 17:58:47,187 INFO L387 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 106 treesize of output 101 [2021-12-21 17:58:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:47,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917555539] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 17:58:47,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 17:58:47,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2021-12-21 17:58:47,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520532448] [2021-12-21 17:58:47,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 17:58:47,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 17:58:47,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:58:47,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 17:58:47,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-12-21 17:58:47,278 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:47,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:58:47,463 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-12-21 17:58:47,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 17:58:47,464 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-21 17:58:47,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:58:47,464 INFO L225 Difference]: With dead ends: 36 [2021-12-21 17:58:47,465 INFO L226 Difference]: Without dead ends: 33 [2021-12-21 17:58:47,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2021-12-21 17:58:47,466 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 71 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 17:58:47,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 36 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 17:58:47,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-21 17:58:47,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2021-12-21 17:58:47,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:47,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-12-21 17:58:47,469 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 18 [2021-12-21 17:58:47,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:58:47,469 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-12-21 17:58:47,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:47,469 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-12-21 17:58:47,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 17:58:47,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:58:47,470 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:58:47,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 17:58:47,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:58:47,697 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:58:47,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:58:47,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1254493542, now seen corresponding path program 2 times [2021-12-21 17:58:47,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:58:47,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034831218] [2021-12-21 17:58:47,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:58:47,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:58:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:58:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:47,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:58:47,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034831218] [2021-12-21 17:58:47,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034831218] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 17:58:47,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388309422] [2021-12-21 17:58:47,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 17:58:47,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:58:47,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:58:47,780 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) [2021-12-21 17:58:47,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 17:58:47,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 17:58:47,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 17:58:47,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 17:58:47,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:58:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:47,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 17:58:48,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 17:58:48,074 INFO L387 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 19 treesize of output 23 [2021-12-21 17:58:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:48,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388309422] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 17:58:48,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 17:58:48,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2021-12-21 17:58:48,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776049318] [2021-12-21 17:58:48,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 17:58:48,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 17:58:48,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:58:48,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 17:58:48,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-12-21 17:58:48,188 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 16 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:48,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:58:48,415 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-12-21 17:58:48,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 17:58:48,415 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-21 17:58:48,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:58:48,416 INFO L225 Difference]: With dead ends: 36 [2021-12-21 17:58:48,416 INFO L226 Difference]: Without dead ends: 36 [2021-12-21 17:58:48,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-12-21 17:58:48,417 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 116 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 17:58:48,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 39 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 17:58:48,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-21 17:58:48,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-12-21 17:58:48,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:48,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-12-21 17:58:48,419 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 22 [2021-12-21 17:58:48,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:58:48,419 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-12-21 17:58:48,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:48,420 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-12-21 17:58:48,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 17:58:48,420 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:58:48,420 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:58:48,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 17:58:48,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:58:48,627 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:58:48,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:58:48,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1549441888, now seen corresponding path program 3 times [2021-12-21 17:58:48,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:58:48,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344087669] [2021-12-21 17:58:48,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:58:48,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:58:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:58:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:48,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:58:48,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344087669] [2021-12-21 17:58:48,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344087669] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 17:58:48,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729192799] [2021-12-21 17:58:48,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 17:58:48,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:58:48,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:58:48,884 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) [2021-12-21 17:58:48,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 17:58:48,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 17:58:48,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 17:58:48,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-21 17:58:48,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:58:48,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 17:58:49,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 17:58:49,317 INFO L387 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 20 treesize of output 20 [2021-12-21 17:58:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:49,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 17:58:49,561 INFO L353 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2021-12-21 17:58:49,562 INFO L387 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 16 treesize of output 17 [2021-12-21 17:58:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:50,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729192799] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 17:58:50,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 17:58:50,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2021-12-21 17:58:50,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812822653] [2021-12-21 17:58:50,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 17:58:50,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-21 17:58:50,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:58:50,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-21 17:58:50,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-12-21 17:58:50,166 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:50,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:58:50,699 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-12-21 17:58:50,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 17:58:50,700 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-21 17:58:50,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:58:50,700 INFO L225 Difference]: With dead ends: 47 [2021-12-21 17:58:50,700 INFO L226 Difference]: Without dead ends: 37 [2021-12-21 17:58:50,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=1260, Unknown=0, NotChecked=0, Total=1560 [2021-12-21 17:58:50,702 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 114 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 17:58:50,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 52 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 17:58:50,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-21 17:58:50,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2021-12-21 17:58:50,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:50,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-12-21 17:58:50,704 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2021-12-21 17:58:50,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:58:50,704 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-12-21 17:58:50,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:50,705 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-12-21 17:58:50,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-21 17:58:50,705 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:58:50,706 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:58:50,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 17:58:50,923 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,SelfDestructingSolverStorable12 [2021-12-21 17:58:50,924 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:58:50,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:58:50,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1131712419, now seen corresponding path program 4 times [2021-12-21 17:58:50,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:58:50,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597553450] [2021-12-21 17:58:50,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:58:50,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:58:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:58:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:51,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:58:51,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597553450] [2021-12-21 17:58:51,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597553450] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 17:58:51,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945223341] [2021-12-21 17:58:51,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 17:58:51,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:58:51,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:58:51,076 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) [2021-12-21 17:58:51,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 17:58:51,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 17:58:51,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 17:58:51,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 17:58:51,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:58:51,348 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:51,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 17:58:51,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 17:58:51,478 INFO L387 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 19 treesize of output 23 [2021-12-21 17:58:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:51,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945223341] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 17:58:51,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 17:58:51,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2021-12-21 17:58:51,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720198205] [2021-12-21 17:58:51,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 17:58:51,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-21 17:58:51,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:58:51,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-21 17:58:51,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-12-21 17:58:51,643 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 22 states, 21 states have (on average 4.238095238095238) internal successors, (89), 22 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:52,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:58:52,033 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-12-21 17:58:52,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 17:58:52,035 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.238095238095238) internal successors, (89), 22 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-21 17:58:52,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:58:52,036 INFO L225 Difference]: With dead ends: 47 [2021-12-21 17:58:52,036 INFO L226 Difference]: Without dead ends: 47 [2021-12-21 17:58:52,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2021-12-21 17:58:52,037 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 111 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 17:58:52,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 78 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 17:58:52,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-21 17:58:52,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2021-12-21 17:58:52,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:52,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-12-21 17:58:52,039 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 33 [2021-12-21 17:58:52,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:58:52,040 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-12-21 17:58:52,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.238095238095238) internal successors, (89), 22 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:52,040 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-12-21 17:58:52,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-21 17:58:52,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:58:52,041 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:58:52,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 17:58:52,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:58:52,255 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:58:52,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:58:52,256 INFO L85 PathProgramCache]: Analyzing trace with hash -128978377, now seen corresponding path program 5 times [2021-12-21 17:58:52,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:58:52,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250870118] [2021-12-21 17:58:52,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:58:52,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:58:52,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:58:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:52,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:58:52,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250870118] [2021-12-21 17:58:52,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250870118] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 17:58:52,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228044571] [2021-12-21 17:58:52,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 17:58:52,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:58:52,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:58:52,492 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) [2021-12-21 17:58:52,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 17:58:52,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-21 17:58:52,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 17:58:52,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-21 17:58:52,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:58:52,895 INFO L387 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 6 treesize of output 5 [2021-12-21 17:58:52,972 INFO L353 Elim1Store]: treesize reduction 12, result has 20.0 percent of original size [2021-12-21 17:58:52,972 INFO L387 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 22 treesize of output 10 [2021-12-21 17:58:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:52,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 17:58:53,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 31 [2021-12-21 17:58:53,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 17:58:53,072 INFO L387 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 31 treesize of output 31 [2021-12-21 17:58:53,428 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:53,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228044571] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 17:58:53,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 17:58:53,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 33 [2021-12-21 17:58:53,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907957536] [2021-12-21 17:58:53,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 17:58:53,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-21 17:58:53,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:58:53,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-21 17:58:53,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-12-21 17:58:53,430 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 33 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:54,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:58:54,017 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2021-12-21 17:58:54,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 17:58:54,018 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 33 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-21 17:58:54,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:58:54,019 INFO L225 Difference]: With dead ends: 65 [2021-12-21 17:58:54,019 INFO L226 Difference]: Without dead ends: 48 [2021-12-21 17:58:54,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=222, Invalid=1758, Unknown=0, NotChecked=0, Total=1980 [2021-12-21 17:58:54,020 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 116 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 17:58:54,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 114 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 17:58:54,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-21 17:58:54,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2021-12-21 17:58:54,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:54,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-12-21 17:58:54,022 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 40 [2021-12-21 17:58:54,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:58:54,022 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-12-21 17:58:54,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 33 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:54,023 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-12-21 17:58:54,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 17:58:54,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:58:54,023 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:58:54,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 17:58:54,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:58:54,224 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:58:54,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:58:54,224 INFO L85 PathProgramCache]: Analyzing trace with hash 749979156, now seen corresponding path program 6 times [2021-12-21 17:58:54,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:58:54,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521299367] [2021-12-21 17:58:54,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:58:54,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:58:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:58:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:54,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:58:54,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521299367] [2021-12-21 17:58:54,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521299367] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 17:58:54,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93142320] [2021-12-21 17:58:54,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 17:58:54,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:58:54,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:58:54,390 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) [2021-12-21 17:58:54,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 17:58:54,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-21 17:58:54,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 17:58:54,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 17:58:54,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:58:54,800 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:54,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 17:58:55,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 17:58:55,025 INFO L387 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 19 treesize of output 23 [2021-12-21 17:58:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:55,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93142320] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 17:58:55,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 17:58:55,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2021-12-21 17:58:55,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145140595] [2021-12-21 17:58:55,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 17:58:55,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-21 17:58:55,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:58:55,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-21 17:58:55,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-12-21 17:58:55,303 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 30 states, 29 states have (on average 4.310344827586207) internal successors, (125), 30 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:55,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:58:55,795 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-12-21 17:58:55,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 17:58:55,795 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.310344827586207) internal successors, (125), 30 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-21 17:58:55,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:58:55,796 INFO L225 Difference]: With dead ends: 58 [2021-12-21 17:58:55,796 INFO L226 Difference]: Without dead ends: 58 [2021-12-21 17:58:55,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2021-12-21 17:58:55,797 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 152 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 17:58:55,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 91 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 17:58:55,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-21 17:58:55,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2021-12-21 17:58:55,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:55,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-12-21 17:58:55,800 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 44 [2021-12-21 17:58:55,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:58:55,800 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-12-21 17:58:55,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.310344827586207) internal successors, (125), 30 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:55,800 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-12-21 17:58:55,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-21 17:58:55,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:58:55,801 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:58:55,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 17:58:56,024 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,SelfDestructingSolverStorable15 [2021-12-21 17:58:56,025 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:58:56,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:58:56,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1410124454, now seen corresponding path program 7 times [2021-12-21 17:58:56,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:58:56,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791154094] [2021-12-21 17:58:56,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:58:56,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:58:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:58:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 16 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:56,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:58:56,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791154094] [2021-12-21 17:58:56,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791154094] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 17:58:56,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765992518] [2021-12-21 17:58:56,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 17:58:56,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:58:56,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:58:56,319 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) [2021-12-21 17:58:56,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 17:58:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:58:56,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-21 17:58:56,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:58:56,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 17:58:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 16 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:56,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 17:58:57,000 INFO L353 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2021-12-21 17:58:57,000 INFO L387 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 16 treesize of output 17 [2021-12-21 17:58:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 16 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:57,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765992518] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 17:58:57,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 17:58:57,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 39 [2021-12-21 17:58:57,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224411461] [2021-12-21 17:58:57,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 17:58:57,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-21 17:58:57,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:58:57,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-21 17:58:57,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2021-12-21 17:58:57,523 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:58,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:58:58,209 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2021-12-21 17:58:58,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 17:58:58,210 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-21 17:58:58,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:58:58,210 INFO L225 Difference]: With dead ends: 83 [2021-12-21 17:58:58,210 INFO L226 Difference]: Without dead ends: 59 [2021-12-21 17:58:58,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=266, Invalid=2184, Unknown=0, NotChecked=0, Total=2450 [2021-12-21 17:58:58,212 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 146 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 17:58:58,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 167 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 17:58:58,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-21 17:58:58,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-12-21 17:58:58,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:58,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-12-21 17:58:58,214 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 51 [2021-12-21 17:58:58,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:58:58,214 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-12-21 17:58:58,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:58:58,215 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-12-21 17:58:58,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 17:58:58,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:58:58,215 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:58:58,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 17:58:58,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-21 17:58:58,427 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:58:58,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:58:58,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1552754007, now seen corresponding path program 8 times [2021-12-21 17:58:58,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:58:58,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855406714] [2021-12-21 17:58:58,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:58:58,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:58:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:58:58,626 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:58,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:58:58,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855406714] [2021-12-21 17:58:58,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855406714] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 17:58:58,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8299511] [2021-12-21 17:58:58,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 17:58:58,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:58:58,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:58:58,630 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) [2021-12-21 17:58:58,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 17:58:58,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 17:58:58,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 17:58:58,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-21 17:58:58,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:58:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 32 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:59,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 17:58:59,242 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 17:58:59,243 INFO L387 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 19 treesize of output 23 [2021-12-21 17:58:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 32 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:58:59,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8299511] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 17:58:59,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 17:58:59,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2021-12-21 17:58:59,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954473869] [2021-12-21 17:58:59,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 17:58:59,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-21 17:58:59,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:58:59,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-21 17:58:59,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2021-12-21 17:58:59,502 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 34 states, 33 states have (on average 4.696969696969697) internal successors, (155), 34 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:00,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:59:00,098 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-12-21 17:59:00,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 17:59:00,099 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 4.696969696969697) internal successors, (155), 34 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-21 17:59:00,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:59:00,099 INFO L225 Difference]: With dead ends: 70 [2021-12-21 17:59:00,099 INFO L226 Difference]: Without dead ends: 70 [2021-12-21 17:59:00,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=1848, Unknown=0, NotChecked=0, Total=2256 [2021-12-21 17:59:00,100 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 160 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 17:59:00,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 146 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 17:59:00,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-21 17:59:00,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2021-12-21 17:59:00,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:00,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-12-21 17:59:00,102 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 55 [2021-12-21 17:59:00,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:59:00,102 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-12-21 17:59:00,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 4.696969696969697) internal successors, (155), 34 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:00,103 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-12-21 17:59:00,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-21 17:59:00,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:59:00,103 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:59:00,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 17:59:00,315 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,SelfDestructingSolverStorable17 [2021-12-21 17:59:00,315 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:59:00,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:59:00,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1510058895, now seen corresponding path program 9 times [2021-12-21 17:59:00,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:59:00,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423223535] [2021-12-21 17:59:00,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:59:00,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:59:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:59:00,646 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 21 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:00,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:59:00,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423223535] [2021-12-21 17:59:00,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423223535] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 17:59:00,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835449883] [2021-12-21 17:59:00,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 17:59:00,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:59:00,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:59:00,648 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) [2021-12-21 17:59:00,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 17:59:00,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-21 17:59:00,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 17:59:00,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-21 17:59:00,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:59:01,357 INFO L353 Elim1Store]: treesize reduction 12, result has 20.0 percent of original size [2021-12-21 17:59:01,357 INFO L387 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 22 treesize of output 10 [2021-12-21 17:59:01,379 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 21 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:01,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 17:59:01,417 INFO L353 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2021-12-21 17:59:01,417 INFO L387 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 16 treesize of output 17 [2021-12-21 17:59:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 21 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:01,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835449883] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 17:59:01,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 17:59:01,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 44 [2021-12-21 17:59:01,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513954827] [2021-12-21 17:59:01,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 17:59:01,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-21 17:59:01,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:59:01,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-21 17:59:01,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1742, Unknown=0, NotChecked=0, Total=1892 [2021-12-21 17:59:01,955 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 44 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 44 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:02,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:59:02,839 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2021-12-21 17:59:02,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 17:59:02,841 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 44 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-21 17:59:02,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:59:02,841 INFO L225 Difference]: With dead ends: 101 [2021-12-21 17:59:02,841 INFO L226 Difference]: Without dead ends: 70 [2021-12-21 17:59:02,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=281, Invalid=3141, Unknown=0, NotChecked=0, Total=3422 [2021-12-21 17:59:02,842 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 75 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 17:59:02,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 232 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1071 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 17:59:02,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-21 17:59:02,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2021-12-21 17:59:02,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:02,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2021-12-21 17:59:02,845 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2021-12-21 17:59:02,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:59:02,845 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2021-12-21 17:59:02,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 44 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:02,846 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2021-12-21 17:59:02,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 17:59:02,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:59:02,847 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:59:02,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 17:59:03,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:59:03,059 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:59:03,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:59:03,060 INFO L85 PathProgramCache]: Analyzing trace with hash 205730958, now seen corresponding path program 10 times [2021-12-21 17:59:03,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:59:03,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131671069] [2021-12-21 17:59:03,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:59:03,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:59:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:59:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 32 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:03,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:59:03,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131671069] [2021-12-21 17:59:03,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131671069] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 17:59:03,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764655622] [2021-12-21 17:59:03,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 17:59:03,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:59:03,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:59:03,360 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) [2021-12-21 17:59:03,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 17:59:03,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 17:59:03,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 17:59:03,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-21 17:59:03,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:59:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 50 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:03,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 17:59:04,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 17:59:04,162 INFO L387 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 19 treesize of output 23 [2021-12-21 17:59:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 50 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:04,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764655622] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 17:59:04,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 17:59:04,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 39 [2021-12-21 17:59:04,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858669292] [2021-12-21 17:59:04,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 17:59:04,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-21 17:59:04,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:59:04,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-21 17:59:04,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1316, Unknown=0, NotChecked=0, Total=1560 [2021-12-21 17:59:04,482 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 40 states, 39 states have (on average 4.82051282051282) internal successors, (188), 40 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:05,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:59:05,297 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2021-12-21 17:59:05,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 17:59:05,298 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 4.82051282051282) internal successors, (188), 40 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-21 17:59:05,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:59:05,298 INFO L225 Difference]: With dead ends: 81 [2021-12-21 17:59:05,298 INFO L226 Difference]: Without dead ends: 81 [2021-12-21 17:59:05,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=554, Invalid=2638, Unknown=0, NotChecked=0, Total=3192 [2021-12-21 17:59:05,299 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 236 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 17:59:05,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 202 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 17:59:05,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-21 17:59:05,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-12-21 17:59:05,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:05,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-12-21 17:59:05,303 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 66 [2021-12-21 17:59:05,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:59:05,303 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-12-21 17:59:05,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 4.82051282051282) internal successors, (188), 40 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:05,304 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-12-21 17:59:05,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 17:59:05,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:59:05,305 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:59:05,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 17:59:05,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:59:05,523 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:59:05,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:59:05,524 INFO L85 PathProgramCache]: Analyzing trace with hash -399180052, now seen corresponding path program 11 times [2021-12-21 17:59:05,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:59:05,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147173085] [2021-12-21 17:59:05,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:59:05,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:59:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:59:05,934 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 26 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:05,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:59:05,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147173085] [2021-12-21 17:59:05,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147173085] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 17:59:05,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564597717] [2021-12-21 17:59:05,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 17:59:05,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:59:05,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:59:05,935 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) [2021-12-21 17:59:05,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 17:59:06,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-21 17:59:06,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 17:59:06,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-21 17:59:06,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:59:06,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 17:59:06,848 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 26 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:06,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 17:59:06,878 INFO L353 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2021-12-21 17:59:06,878 INFO L387 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 16 treesize of output 17 [2021-12-21 17:59:07,617 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 26 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:07,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564597717] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 17:59:07,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 17:59:07,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 52 [2021-12-21 17:59:07,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667288137] [2021-12-21 17:59:07,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 17:59:07,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-21 17:59:07,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:59:07,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-21 17:59:07,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2432, Unknown=0, NotChecked=0, Total=2652 [2021-12-21 17:59:07,619 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 52 states, 52 states have (on average 3.8653846153846154) internal successors, (201), 52 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:08,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:59:08,516 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2021-12-21 17:59:08,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-21 17:59:08,517 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.8653846153846154) internal successors, (201), 52 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-21 17:59:08,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:59:08,517 INFO L225 Difference]: With dead ends: 119 [2021-12-21 17:59:08,517 INFO L226 Difference]: Without dead ends: 81 [2021-12-21 17:59:08,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=347, Invalid=3685, Unknown=0, NotChecked=0, Total=4032 [2021-12-21 17:59:08,519 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 123 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 1519 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 17:59:08,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 314 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1519 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 17:59:08,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-21 17:59:08,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-12-21 17:59:08,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-12-21 17:59:08,521 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 73 [2021-12-21 17:59:08,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:59:08,521 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-12-21 17:59:08,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.8653846153846154) internal successors, (201), 52 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:08,522 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-12-21 17:59:08,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-21 17:59:08,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:59:08,522 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:59:08,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-21 17:59:08,727 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,SelfDestructingSolverStorable20 [2021-12-21 17:59:08,727 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:59:08,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:59:08,728 INFO L85 PathProgramCache]: Analyzing trace with hash -12330321, now seen corresponding path program 12 times [2021-12-21 17:59:08,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:59:08,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154209367] [2021-12-21 17:59:08,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:59:08,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:59:08,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:59:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 50 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:09,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:59:09,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154209367] [2021-12-21 17:59:09,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154209367] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 17:59:09,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780116750] [2021-12-21 17:59:09,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 17:59:09,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:59:09,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:59:09,004 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) [2021-12-21 17:59:09,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 17:59:09,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-21 17:59:09,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 17:59:09,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-21 17:59:09,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:59:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 72 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:09,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 17:59:10,006 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 17:59:10,006 INFO L387 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 19 treesize of output 23 [2021-12-21 17:59:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 72 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:10,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780116750] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 17:59:10,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 17:59:10,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 47 [2021-12-21 17:59:10,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609436437] [2021-12-21 17:59:10,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 17:59:10,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-21 17:59:10,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:59:10,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-21 17:59:10,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1877, Unknown=0, NotChecked=0, Total=2256 [2021-12-21 17:59:10,398 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 48 states, 47 states have (on average 4.76595744680851) internal successors, (224), 48 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:11,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:59:11,327 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2021-12-21 17:59:11,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 17:59:11,327 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.76595744680851) internal successors, (224), 48 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-21 17:59:11,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:59:11,328 INFO L225 Difference]: With dead ends: 92 [2021-12-21 17:59:11,328 INFO L226 Difference]: Without dead ends: 92 [2021-12-21 17:59:11,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=872, Invalid=3684, Unknown=0, NotChecked=0, Total=4556 [2021-12-21 17:59:11,330 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 272 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 17:59:11,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 234 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 17:59:11,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-21 17:59:11,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2021-12-21 17:59:11,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:11,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-12-21 17:59:11,332 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 77 [2021-12-21 17:59:11,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:59:11,332 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-12-21 17:59:11,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.76595744680851) internal successors, (224), 48 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:11,333 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-12-21 17:59:11,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-21 17:59:11,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:59:11,333 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:59:11,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-21 17:59:11,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:59:11,534 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:59:11,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:59:11,534 INFO L85 PathProgramCache]: Analyzing trace with hash -61578837, now seen corresponding path program 13 times [2021-12-21 17:59:11,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:59:11,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604163280] [2021-12-21 17:59:11,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:59:11,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:59:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:59:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 31 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:11,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:59:11,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604163280] [2021-12-21 17:59:11,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604163280] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 17:59:11,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306402649] [2021-12-21 17:59:11,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 17:59:11,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:59:11,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:59:11,936 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) [2021-12-21 17:59:11,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-21 17:59:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:59:12,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-21 17:59:12,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:59:12,485 INFO L387 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 [2021-12-21 17:59:12,574 INFO L387 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 [2021-12-21 17:59:12,669 INFO L387 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 [2021-12-21 17:59:12,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 17:59:12,874 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2021-12-21 17:59:13,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 17:59:13,088 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2021-12-21 17:59:13,198 INFO L387 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 [2021-12-21 17:59:13,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 17:59:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 31 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:13,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 17:59:18,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 17:59:18,242 INFO L387 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 152142 treesize of output 147574 [2021-12-21 17:59:18,521 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-21 17:59:18,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 17:59:18,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-12-21 17:59:18,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674231159] [2021-12-21 17:59:18,521 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 17:59:18,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-21 17:59:18,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:59:18,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-21 17:59:18,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=3765, Unknown=1, NotChecked=0, Total=4160 [2021-12-21 17:59:18,523 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:19,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:59:19,447 INFO L93 Difference]: Finished difference Result 134 states and 135 transitions. [2021-12-21 17:59:19,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-21 17:59:19,447 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-21 17:59:19,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:59:19,448 INFO L225 Difference]: With dead ends: 134 [2021-12-21 17:59:19,448 INFO L226 Difference]: Without dead ends: 89 [2021-12-21 17:59:19,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2274 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=503, Invalid=5348, Unknown=1, NotChecked=0, Total=5852 [2021-12-21 17:59:19,450 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 95 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 17:59:19,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 195 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 17:59:19,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-21 17:59:19,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-21 17:59:19,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:19,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-12-21 17:59:19,452 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2021-12-21 17:59:19,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:59:19,453 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-12-21 17:59:19,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0) internal successors, (84), 21 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:19,453 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-12-21 17:59:19,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-21 17:59:19,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:59:19,454 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:59:19,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-21 17:59:19,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:59:19,663 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:59:19,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:59:19,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1699716616, now seen corresponding path program 14 times [2021-12-21 17:59:19,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:59:19,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227539625] [2021-12-21 17:59:19,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:59:19,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:59:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:59:19,974 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 66 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:19,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:59:19,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227539625] [2021-12-21 17:59:19,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227539625] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 17:59:19,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053978968] [2021-12-21 17:59:19,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 17:59:19,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:59:19,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:59:19,979 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) [2021-12-21 17:59:19,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-21 17:59:20,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 17:59:20,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 17:59:20,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-21 17:59:20,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:59:20,755 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 98 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:20,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 17:59:21,181 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 17:59:21,182 INFO L387 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 19 treesize of output 23 [2021-12-21 17:59:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 98 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:21,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053978968] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 17:59:21,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 17:59:21,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 51 [2021-12-21 17:59:21,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697752347] [2021-12-21 17:59:21,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 17:59:21,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-21 17:59:21,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:59:21,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-21 17:59:21,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2353, Unknown=0, NotChecked=0, Total=2652 [2021-12-21 17:59:21,703 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 52 states, 51 states have (on average 4.980392156862745) internal successors, (254), 52 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:23,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:59:23,160 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2021-12-21 17:59:23,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-21 17:59:23,161 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 4.980392156862745) internal successors, (254), 52 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-12-21 17:59:23,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:59:23,161 INFO L225 Difference]: With dead ends: 102 [2021-12-21 17:59:23,161 INFO L226 Difference]: Without dead ends: 102 [2021-12-21 17:59:23,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=825, Invalid=4875, Unknown=0, NotChecked=0, Total=5700 [2021-12-21 17:59:23,163 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 326 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 17:59:23,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 300 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 17:59:23,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-21 17:59:23,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2021-12-21 17:59:23,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:23,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2021-12-21 17:59:23,165 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 88 [2021-12-21 17:59:23,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:59:23,165 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2021-12-21 17:59:23,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 4.980392156862745) internal successors, (254), 52 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:23,166 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2021-12-21 17:59:23,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-21 17:59:23,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:59:23,166 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:59:23,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-21 17:59:23,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-21 17:59:23,367 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:59:23,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:59:23,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1717557298, now seen corresponding path program 15 times [2021-12-21 17:59:23,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:59:23,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472620161] [2021-12-21 17:59:23,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:59:23,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:59:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:59:23,868 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 36 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:23,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:59:23,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472620161] [2021-12-21 17:59:23,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472620161] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 17:59:23,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801053259] [2021-12-21 17:59:23,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 17:59:23,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:59:23,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:59:23,869 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) [2021-12-21 17:59:23,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-21 17:59:24,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-21 17:59:24,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 17:59:24,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-21 17:59:24,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:59:25,275 INFO L353 Elim1Store]: treesize reduction 12, result has 20.0 percent of original size [2021-12-21 17:59:25,276 INFO L387 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 22 treesize of output 10 [2021-12-21 17:59:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 36 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:25,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 17:59:25,356 INFO L353 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2021-12-21 17:59:25,356 INFO L387 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 16 treesize of output 17 [2021-12-21 17:59:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 36 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:26,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801053259] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 17:59:26,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 17:59:26,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 61 [2021-12-21 17:59:26,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521154846] [2021-12-21 17:59:26,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 17:59:26,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-21 17:59:26,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:59:26,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-21 17:59:26,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3463, Unknown=0, NotChecked=0, Total=3660 [2021-12-21 17:59:26,367 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 61 states, 61 states have (on average 4.377049180327869) internal successors, (267), 61 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:28,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:59:28,053 INFO L93 Difference]: Finished difference Result 155 states and 156 transitions. [2021-12-21 17:59:28,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-21 17:59:28,054 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 4.377049180327869) internal successors, (267), 61 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-21 17:59:28,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:59:28,054 INFO L225 Difference]: With dead ends: 155 [2021-12-21 17:59:28,054 INFO L226 Difference]: Without dead ends: 103 [2021-12-21 17:59:28,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1662 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=377, Invalid=6429, Unknown=0, NotChecked=0, Total=6806 [2021-12-21 17:59:28,055 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 128 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 2449 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 2475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 17:59:28,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 531 Invalid, 2475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2449 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 17:59:28,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-21 17:59:28,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2021-12-21 17:59:28,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:28,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2021-12-21 17:59:28,057 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2021-12-21 17:59:28,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:59:28,058 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2021-12-21 17:59:28,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 4.377049180327869) internal successors, (267), 61 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:28,058 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2021-12-21 17:59:28,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-21 17:59:28,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:59:28,059 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:59:28,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-21 17:59:28,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:59:28,265 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:59:28,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:59:28,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1865404491, now seen corresponding path program 16 times [2021-12-21 17:59:28,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:59:28,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959113391] [2021-12-21 17:59:28,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:59:28,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:59:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:59:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 91 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:28,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:59:28,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959113391] [2021-12-21 17:59:28,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959113391] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 17:59:28,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651078247] [2021-12-21 17:59:28,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 17:59:28,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:59:28,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:59:28,619 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) [2021-12-21 17:59:28,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-21 17:59:28,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 17:59:28,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 17:59:28,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-21 17:59:28,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:59:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 128 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:29,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 17:59:29,898 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 17:59:29,898 INFO L387 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 19 treesize of output 23 [2021-12-21 17:59:30,473 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 128 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:30,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651078247] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 17:59:30,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 17:59:30,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 50 [2021-12-21 17:59:30,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392594369] [2021-12-21 17:59:30,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 17:59:30,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-21 17:59:30,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:59:30,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-21 17:59:30,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=2244, Unknown=0, NotChecked=0, Total=2550 [2021-12-21 17:59:30,475 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 51 states, 50 states have (on average 4.8) internal successors, (240), 51 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:32,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:59:32,168 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2021-12-21 17:59:32,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-21 17:59:32,169 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 4.8) internal successors, (240), 51 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-21 17:59:32,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:59:32,170 INFO L225 Difference]: With dead ends: 113 [2021-12-21 17:59:32,170 INFO L226 Difference]: Without dead ends: 113 [2021-12-21 17:59:32,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=953, Invalid=5053, Unknown=0, NotChecked=0, Total=6006 [2021-12-21 17:59:32,171 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 306 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 17:59:32,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 392 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1721 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 17:59:32,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-21 17:59:32,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107. [2021-12-21 17:59:32,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:32,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2021-12-21 17:59:32,173 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 99 [2021-12-21 17:59:32,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:59:32,173 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2021-12-21 17:59:32,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 4.8) internal successors, (240), 51 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:32,174 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2021-12-21 17:59:32,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-21 17:59:32,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:59:32,174 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:59:32,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-21 17:59:32,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:59:32,375 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:59:32,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:59:32,375 INFO L85 PathProgramCache]: Analyzing trace with hash 141916645, now seen corresponding path program 17 times [2021-12-21 17:59:32,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:59:32,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489229764] [2021-12-21 17:59:32,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:59:32,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:59:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:59:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 41 proven. 373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:32,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:59:32,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489229764] [2021-12-21 17:59:32,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489229764] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 17:59:32,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468202346] [2021-12-21 17:59:32,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 17:59:32,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:59:32,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:59:32,965 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) [2021-12-21 17:59:32,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-21 17:59:33,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-21 17:59:33,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 17:59:33,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-21 17:59:33,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:59:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 41 proven. 373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:34,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 17:59:34,886 INFO L353 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2021-12-21 17:59:34,886 INFO L387 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 16 treesize of output 17 [2021-12-21 17:59:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 41 proven. 373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:36,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468202346] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 17:59:36,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 17:59:36,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 69 [2021-12-21 17:59:36,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662890078] [2021-12-21 17:59:36,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 17:59:36,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-21 17:59:36,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:59:36,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-21 17:59:36,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=4461, Unknown=0, NotChecked=0, Total=4692 [2021-12-21 17:59:36,071 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 69 states, 69 states have (on average 4.36231884057971) internal successors, (301), 69 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:38,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 17:59:38,148 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2021-12-21 17:59:38,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-21 17:59:38,148 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 4.36231884057971) internal successors, (301), 69 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-12-21 17:59:38,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 17:59:38,149 INFO L225 Difference]: With dead ends: 173 [2021-12-21 17:59:38,149 INFO L226 Difference]: Without dead ends: 114 [2021-12-21 17:59:38,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2101 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=423, Invalid=7949, Unknown=0, NotChecked=0, Total=8372 [2021-12-21 17:59:38,150 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 108 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 2627 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 2722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 17:59:38,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 593 Invalid, 2722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2627 Invalid, 0 Unknown, 70 Unchecked, 1.0s Time] [2021-12-21 17:59:38,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-21 17:59:38,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2021-12-21 17:59:38,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:38,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2021-12-21 17:59:38,152 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 106 [2021-12-21 17:59:38,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 17:59:38,152 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2021-12-21 17:59:38,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 4.36231884057971) internal successors, (301), 69 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 17:59:38,153 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2021-12-21 17:59:38,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-21 17:59:38,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 17:59:38,153 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 17:59:38,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-21 17:59:38,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:59:38,354 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-21 17:59:38,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 17:59:38,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1193304706, now seen corresponding path program 18 times [2021-12-21 17:59:38,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 17:59:38,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438539904] [2021-12-21 17:59:38,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 17:59:38,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 17:59:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 17:59:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 128 proven. 323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:38,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 17:59:38,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438539904] [2021-12-21 17:59:38,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438539904] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 17:59:38,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034121587] [2021-12-21 17:59:38,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 17:59:38,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 17:59:38,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 17:59:38,774 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) [2021-12-21 17:59:38,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-21 17:59:39,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-21 17:59:39,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 17:59:39,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-21 17:59:39,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 17:59:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 153 proven. 298 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:40,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 17:59:40,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 17:59:40,535 INFO L387 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 18 treesize of output 22 [2021-12-21 17:59:42,108 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 153 proven. 298 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 17:59:42,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034121587] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 17:59:42,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 17:59:42,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 67 [2021-12-21 17:59:42,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086982192] [2021-12-21 17:59:42,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 17:59:42,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-21 17:59:42,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 17:59:42,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-21 17:59:42,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=3926, Unknown=0, NotChecked=0, Total=4556 [2021-12-21 17:59:42,110 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 68 states, 67 states have (on average 4.82089552238806) internal successors, (323), 68 states have internal predecessors, (323), 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)