./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext3/getNumbers4-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety-ext3/getNumbers4-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6bc6b4117baccd9c0c047fce306a2f95fb55fa90595dfb64eaa429319b56a306 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 16:48:12,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 16:48:12,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 16:48:12,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 16:48:12,412 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 16:48:12,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 16:48:12,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 16:48:12,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 16:48:12,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 16:48:12,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 16:48:12,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 16:48:12,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 16:48:12,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 16:48:12,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 16:48:12,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 16:48:12,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 16:48:12,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 16:48:12,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 16:48:12,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 16:48:12,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 16:48:12,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 16:48:12,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 16:48:12,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 16:48:12,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 16:48:12,440 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 16:48:12,440 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 16:48:12,440 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 16:48:12,441 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 16:48:12,441 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 16:48:12,442 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 16:48:12,442 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 16:48:12,442 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 16:48:12,443 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 16:48:12,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 16:48:12,444 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 16:48:12,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 16:48:12,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 16:48:12,445 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 16:48:12,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 16:48:12,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 16:48:12,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 16:48:12,447 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 16:48:12,476 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 16:48:12,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 16:48:12,477 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 16:48:12,477 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 16:48:12,478 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 16:48:12,478 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 16:48:12,478 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 16:48:12,478 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 16:48:12,478 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 16:48:12,479 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 16:48:12,480 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 16:48:12,480 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 16:48:12,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 16:48:12,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 16:48:12,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 16:48:12,480 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 16:48:12,481 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 16:48:12,481 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 16:48:12,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 16:48:12,481 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 16:48:12,481 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 16:48:12,481 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 16:48:12,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 16:48:12,482 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 16:48:12,482 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 16:48:12,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:48:12,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 16:48:12,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 16:48:12,483 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 16:48:12,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 16:48:12,484 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 16:48:12,484 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6bc6b4117baccd9c0c047fce306a2f95fb55fa90595dfb64eaa429319b56a306 [2021-12-22 16:48:12,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 16:48:12,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 16:48:12,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 16:48:12,680 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 16:48:12,682 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 16:48:12,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext3/getNumbers4-1.c [2021-12-22 16:48:12,736 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fba853462/41fc25f6c10c492faf190b0b5127d423/FLAGe0b8f6736 [2021-12-22 16:48:13,084 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 16:48:13,084 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/getNumbers4-1.c [2021-12-22 16:48:13,088 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fba853462/41fc25f6c10c492faf190b0b5127d423/FLAGe0b8f6736 [2021-12-22 16:48:13,097 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fba853462/41fc25f6c10c492faf190b0b5127d423 [2021-12-22 16:48:13,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 16:48:13,100 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 16:48:13,102 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 16:48:13,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 16:48:13,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 16:48:13,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:48:13" (1/1) ... [2021-12-22 16:48:13,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23d99f80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:13, skipping insertion in model container [2021-12-22 16:48:13,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:48:13" (1/1) ... [2021-12-22 16:48:13,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 16:48:13,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:48:13,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:48:13,253 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 16:48:13,264 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:48:13,274 INFO L208 MainTranslator]: Completed translation [2021-12-22 16:48:13,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:13 WrapperNode [2021-12-22 16:48:13,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 16:48:13,275 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 16:48:13,275 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 16:48:13,275 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 16:48:13,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:13" (1/1) ... [2021-12-22 16:48:13,285 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:13" (1/1) ... [2021-12-22 16:48:13,307 INFO L137 Inliner]: procedures = 13, calls = 23, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 97 [2021-12-22 16:48:13,308 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 16:48:13,308 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 16:48:13,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 16:48:13,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 16:48:13,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:13" (1/1) ... [2021-12-22 16:48:13,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:13" (1/1) ... [2021-12-22 16:48:13,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:13" (1/1) ... [2021-12-22 16:48:13,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:13" (1/1) ... [2021-12-22 16:48:13,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:13" (1/1) ... [2021-12-22 16:48:13,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:13" (1/1) ... [2021-12-22 16:48:13,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:13" (1/1) ... [2021-12-22 16:48:13,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 16:48:13,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 16:48:13,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 16:48:13,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 16:48:13,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:13" (1/1) ... [2021-12-22 16:48:13,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:48:13,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:13,389 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) [2021-12-22 16:48:13,406 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 [2021-12-22 16:48:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 16:48:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 16:48:13,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 16:48:13,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 16:48:13,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 16:48:13,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 16:48:13,478 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 16:48:13,479 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 16:48:13,655 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 16:48:13,661 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 16:48:13,662 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-22 16:48:13,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:48:13 BoogieIcfgContainer [2021-12-22 16:48:13,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 16:48:13,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 16:48:13,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 16:48:13,668 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 16:48:13,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:48:13" (1/3) ... [2021-12-22 16:48:13,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64fe3db0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:48:13, skipping insertion in model container [2021-12-22 16:48:13,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:13" (2/3) ... [2021-12-22 16:48:13,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64fe3db0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:48:13, skipping insertion in model container [2021-12-22 16:48:13,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:48:13" (3/3) ... [2021-12-22 16:48:13,670 INFO L111 eAbstractionObserver]: Analyzing ICFG getNumbers4-1.c [2021-12-22 16:48:13,675 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 16:48:13,675 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2021-12-22 16:48:13,718 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 16:48:13,725 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 [2021-12-22 16:48:13,725 INFO L340 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2021-12-22 16:48:13,742 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 52 states have internal predecessors, (62), 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) [2021-12-22 16:48:13,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-22 16:48:13,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:13,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-22 16:48:13,747 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:13,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:13,752 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2021-12-22 16:48:13,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:13,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398556284] [2021-12-22 16:48:13,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:13,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:13,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:13,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398556284] [2021-12-22 16:48:13,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398556284] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:13,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:13,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-22 16:48:13,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018818425] [2021-12-22 16:48:13,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:13,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:48:13,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:13,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:48:13,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:48:13,995 INFO L87 Difference]: Start difference. First operand has 53 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 52 states have internal predecessors, (62), 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 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-12-22 16:48:14,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:14,042 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-12-22 16:48:14,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:48:14,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-12-22 16:48:14,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:14,050 INFO L225 Difference]: With dead ends: 52 [2021-12-22 16:48:14,051 INFO L226 Difference]: Without dead ends: 50 [2021-12-22 16:48:14,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:48:14,058 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 53 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:14,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 36 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:14,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-22 16:48:14,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-12-22 16:48:14,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.588235294117647) internal successors, (54), 49 states have internal predecessors, (54), 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) [2021-12-22 16:48:14,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-12-22 16:48:14,085 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 4 [2021-12-22 16:48:14,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:14,085 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-12-22 16:48:14,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-12-22 16:48:14,086 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-12-22 16:48:14,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-22 16:48:14,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:14,086 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-22 16:48:14,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 16:48:14,087 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:14,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:14,089 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2021-12-22 16:48:14,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:14,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690577451] [2021-12-22 16:48:14,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:14,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:14,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:14,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:14,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690577451] [2021-12-22 16:48:14,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690577451] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:14,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:14,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:48:14,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269182870] [2021-12-22 16:48:14,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:14,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:48:14,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:14,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:48:14,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:48:14,197 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-12-22 16:48:14,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:14,242 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-12-22 16:48:14,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:48:14,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-12-22 16:48:14,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:14,243 INFO L225 Difference]: With dead ends: 53 [2021-12-22 16:48:14,243 INFO L226 Difference]: Without dead ends: 53 [2021-12-22 16:48:14,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:48:14,244 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 55 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:14,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 67 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:14,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-22 16:48:14,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-12-22 16:48:14,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 51 states have internal predecessors, (56), 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) [2021-12-22 16:48:14,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-12-22 16:48:14,253 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 4 [2021-12-22 16:48:14,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:14,253 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-12-22 16:48:14,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-12-22 16:48:14,253 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-12-22 16:48:14,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 16:48:14,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:14,254 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-12-22 16:48:14,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 16:48:14,255 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:14,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:14,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1809646286, now seen corresponding path program 1 times [2021-12-22 16:48:14,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:14,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113445082] [2021-12-22 16:48:14,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:14,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:14,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:14,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113445082] [2021-12-22 16:48:14,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113445082] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:14,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464364584] [2021-12-22 16:48:14,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:14,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:14,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:14,352 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) [2021-12-22 16:48:14,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 16:48:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:14,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 16:48:14,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:14,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:14,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464364584] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:14,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:14,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2021-12-22 16:48:14,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738260882] [2021-12-22 16:48:14,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:14,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 16:48:14,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:14,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 16:48:14,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:48:14,594 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 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) [2021-12-22 16:48:14,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:14,741 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2021-12-22 16:48:14,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:48:14,742 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 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 [2021-12-22 16:48:14,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:14,745 INFO L225 Difference]: With dead ends: 61 [2021-12-22 16:48:14,745 INFO L226 Difference]: Without dead ends: 61 [2021-12-22 16:48:14,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-12-22 16:48:14,748 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 125 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:14,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 99 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:48:14,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-22 16:48:14,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-12-22 16:48:14,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 60 states have internal predecessors, (65), 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) [2021-12-22 16:48:14,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2021-12-22 16:48:14,757 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 7 [2021-12-22 16:48:14,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:14,757 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2021-12-22 16:48:14,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 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) [2021-12-22 16:48:14,757 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2021-12-22 16:48:14,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 16:48:14,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:14,758 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1] [2021-12-22 16:48:14,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:14,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:14,975 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:14,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:14,976 INFO L85 PathProgramCache]: Analyzing trace with hash -116849082, now seen corresponding path program 2 times [2021-12-22 16:48:14,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:14,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910207363] [2021-12-22 16:48:14,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:14,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:15,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:15,175 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:15,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:15,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910207363] [2021-12-22 16:48:15,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910207363] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:15,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292356716] [2021-12-22 16:48:15,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:48:15,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:15,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:15,179 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) [2021-12-22 16:48:15,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 16:48:15,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:48:15,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:48:15,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 16:48:15,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:15,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:48:15,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292356716] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:15,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:48:15,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 13 [2021-12-22 16:48:15,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959810934] [2021-12-22 16:48:15,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:15,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 16:48:15,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:15,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 16:48:15,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-12-22 16:48:15,448 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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) [2021-12-22 16:48:15,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:15,496 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2021-12-22 16:48:15,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 16:48:15,496 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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 16 [2021-12-22 16:48:15,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:15,497 INFO L225 Difference]: With dead ends: 61 [2021-12-22 16:48:15,497 INFO L226 Difference]: Without dead ends: 61 [2021-12-22 16:48:15,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-12-22 16:48:15,498 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 102 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:15,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 66 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:15,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-22 16:48:15,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-12-22 16:48:15,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 58 states have internal predecessors, (63), 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) [2021-12-22 16:48:15,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-12-22 16:48:15,501 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 16 [2021-12-22 16:48:15,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:15,502 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-12-22 16:48:15,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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) [2021-12-22 16:48:15,502 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-12-22 16:48:15,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 16:48:15,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:15,503 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:15,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:15,718 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,SelfDestructingSolverStorable3 [2021-12-22 16:48:15,719 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:15,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:15,719 INFO L85 PathProgramCache]: Analyzing trace with hash -2129139286, now seen corresponding path program 1 times [2021-12-22 16:48:15,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:15,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7618053] [2021-12-22 16:48:15,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:15,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:15,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:15,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7618053] [2021-12-22 16:48:15,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7618053] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:15,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684151100] [2021-12-22 16:48:15,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:15,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:15,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:15,784 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) [2021-12-22 16:48:15,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 16:48:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:15,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 16:48:15,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:15,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:15,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684151100] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:15,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:15,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-22 16:48:15,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721527169] [2021-12-22 16:48:15,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:15,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 16:48:15,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:15,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 16:48:15,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:48:15,952 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 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) [2021-12-22 16:48:15,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:15,989 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2021-12-22 16:48:15,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 16:48:15,990 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 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 19 [2021-12-22 16:48:15,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:15,991 INFO L225 Difference]: With dead ends: 77 [2021-12-22 16:48:15,991 INFO L226 Difference]: Without dead ends: 77 [2021-12-22 16:48:15,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:48:15,992 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 30 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:15,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 338 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:15,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-22 16:48:15,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-12-22 16:48:15,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 76 states have internal predecessors, (81), 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) [2021-12-22 16:48:15,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2021-12-22 16:48:15,995 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 19 [2021-12-22 16:48:15,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:15,995 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2021-12-22 16:48:15,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 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) [2021-12-22 16:48:15,995 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2021-12-22 16:48:15,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-22 16:48:15,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:15,996 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:16,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:16,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:16,201 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:16,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:16,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1224069290, now seen corresponding path program 2 times [2021-12-22 16:48:16,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:16,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421412008] [2021-12-22 16:48:16,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:16,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 100 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:16,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:16,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421412008] [2021-12-22 16:48:16,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421412008] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:16,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897389543] [2021-12-22 16:48:16,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:48:16,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:16,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:16,376 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) [2021-12-22 16:48:16,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 16:48:16,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 16:48:16,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:48:16,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 16:48:16,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:16,667 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-22 16:48:16,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:48:16,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897389543] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:16,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:48:16,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 17 [2021-12-22 16:48:16,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955171021] [2021-12-22 16:48:16,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:16,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:48:16,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:16,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:48:16,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-12-22 16:48:16,668 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-12-22 16:48:16,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:16,725 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2021-12-22 16:48:16,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:48:16,728 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 37 [2021-12-22 16:48:16,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:16,729 INFO L225 Difference]: With dead ends: 85 [2021-12-22 16:48:16,729 INFO L226 Difference]: Without dead ends: 85 [2021-12-22 16:48:16,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-12-22 16:48:16,729 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 113 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:16,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 66 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:16,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-22 16:48:16,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2021-12-22 16:48:16,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 64 states have (on average 1.3125) internal successors, (84), 78 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) [2021-12-22 16:48:16,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2021-12-22 16:48:16,732 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 37 [2021-12-22 16:48:16,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:16,733 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2021-12-22 16:48:16,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-12-22 16:48:16,733 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2021-12-22 16:48:16,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-22 16:48:16,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:16,733 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:16,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:16,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:16,946 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:16,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:16,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1224069289, now seen corresponding path program 1 times [2021-12-22 16:48:16,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:16,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835227556] [2021-12-22 16:48:16,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:16,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-22 16:48:16,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:16,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835227556] [2021-12-22 16:48:16,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835227556] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:16,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:16,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:48:16,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425161742] [2021-12-22 16:48:16,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:16,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:48:16,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:16,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:48:16,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:48:16,990 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-12-22 16:48:17,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:17,013 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2021-12-22 16:48:17,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:48:17,013 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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 37 [2021-12-22 16:48:17,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:17,014 INFO L225 Difference]: With dead ends: 78 [2021-12-22 16:48:17,014 INFO L226 Difference]: Without dead ends: 78 [2021-12-22 16:48:17,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:48:17,014 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 135 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:17,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 39 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:17,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-22 16:48:17,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-12-22 16:48:17,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 64 states have (on average 1.28125) internal successors, (82), 77 states have internal predecessors, (82), 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) [2021-12-22 16:48:17,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-12-22 16:48:17,017 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 37 [2021-12-22 16:48:17,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:17,017 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-12-22 16:48:17,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-12-22 16:48:17,017 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-12-22 16:48:17,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-22 16:48:17,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:17,018 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:17,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 16:48:17,018 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:17,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:17,018 INFO L85 PathProgramCache]: Analyzing trace with hash -708557702, now seen corresponding path program 1 times [2021-12-22 16:48:17,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:17,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805749528] [2021-12-22 16:48:17,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:17,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-22 16:48:17,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:17,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805749528] [2021-12-22 16:48:17,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805749528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:17,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:17,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-22 16:48:17,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279519464] [2021-12-22 16:48:17,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:17,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:48:17,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:17,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:48:17,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:48:17,082 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-12-22 16:48:17,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:17,094 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2021-12-22 16:48:17,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:48:17,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 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 38 [2021-12-22 16:48:17,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:17,096 INFO L225 Difference]: With dead ends: 77 [2021-12-22 16:48:17,096 INFO L226 Difference]: Without dead ends: 77 [2021-12-22 16:48:17,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:48:17,097 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:17,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 34 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:17,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-22 16:48:17,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-12-22 16:48:17,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 64 states have (on average 1.265625) internal successors, (81), 76 states have internal predecessors, (81), 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) [2021-12-22 16:48:17,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2021-12-22 16:48:17,104 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 38 [2021-12-22 16:48:17,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:17,105 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2021-12-22 16:48:17,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-12-22 16:48:17,105 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2021-12-22 16:48:17,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-22 16:48:17,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:17,105 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:17,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 16:48:17,105 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:17,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:17,106 INFO L85 PathProgramCache]: Analyzing trace with hash -708557701, now seen corresponding path program 1 times [2021-12-22 16:48:17,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:17,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820851065] [2021-12-22 16:48:17,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:17,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-22 16:48:17,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:17,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820851065] [2021-12-22 16:48:17,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820851065] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:17,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:17,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:48:17,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912771127] [2021-12-22 16:48:17,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:17,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:48:17,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:17,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:48:17,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:48:17,173 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-12-22 16:48:17,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:17,200 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2021-12-22 16:48:17,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:48:17,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 38 [2021-12-22 16:48:17,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:17,200 INFO L225 Difference]: With dead ends: 80 [2021-12-22 16:48:17,200 INFO L226 Difference]: Without dead ends: 80 [2021-12-22 16:48:17,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:48:17,202 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 48 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:17,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 62 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:17,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-22 16:48:17,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2021-12-22 16:48:17,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 77 states have internal predecessors, (82), 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) [2021-12-22 16:48:17,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-12-22 16:48:17,208 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 38 [2021-12-22 16:48:17,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:17,209 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-12-22 16:48:17,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-12-22 16:48:17,209 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-12-22 16:48:17,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-22 16:48:17,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:17,214 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:17,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 16:48:17,215 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:17,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:17,215 INFO L85 PathProgramCache]: Analyzing trace with hash 414994334, now seen corresponding path program 1 times [2021-12-22 16:48:17,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:17,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444843690] [2021-12-22 16:48:17,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:17,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:17,397 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 100 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:17,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:17,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444843690] [2021-12-22 16:48:17,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444843690] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:17,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348600991] [2021-12-22 16:48:17,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:17,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:17,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:17,399 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) [2021-12-22 16:48:17,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 16:48:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:17,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-22 16:48:17,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:17,726 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-22 16:48:17,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-22 16:48:17,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348600991] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:17,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:17,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 4, 4] total 23 [2021-12-22 16:48:17,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375928665] [2021-12-22 16:48:17,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:17,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 16:48:17,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:17,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 16:48:17,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-12-22 16:48:17,924 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 25 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 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) [2021-12-22 16:48:18,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:18,296 INFO L93 Difference]: Finished difference Result 160 states and 170 transitions. [2021-12-22 16:48:18,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 16:48:18,297 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 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 42 [2021-12-22 16:48:18,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:18,298 INFO L225 Difference]: With dead ends: 160 [2021-12-22 16:48:18,298 INFO L226 Difference]: Without dead ends: 160 [2021-12-22 16:48:18,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2021-12-22 16:48:18,299 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 1057 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:18,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 211 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:48:18,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-22 16:48:18,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 92. [2021-12-22 16:48:18,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 79 states have (on average 1.2658227848101267) internal successors, (100), 91 states have internal predecessors, (100), 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) [2021-12-22 16:48:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2021-12-22 16:48:18,302 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 42 [2021-12-22 16:48:18,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:18,302 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2021-12-22 16:48:18,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 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) [2021-12-22 16:48:18,302 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2021-12-22 16:48:18,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 16:48:18,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:18,303 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:18,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:18,515 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,SelfDestructingSolverStorable9 [2021-12-22 16:48:18,515 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:18,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:18,516 INFO L85 PathProgramCache]: Analyzing trace with hash -20077561, now seen corresponding path program 1 times [2021-12-22 16:48:18,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:18,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917479647] [2021-12-22 16:48:18,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:18,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:18,612 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-22 16:48:18,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:18,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917479647] [2021-12-22 16:48:18,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917479647] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:18,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005335646] [2021-12-22 16:48:18,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:18,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:18,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:18,613 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) [2021-12-22 16:48:18,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 16:48:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:18,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 16:48:18,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-22 16:48:18,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-22 16:48:19,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005335646] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:19,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:19,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2021-12-22 16:48:19,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511199739] [2021-12-22 16:48:19,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:19,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 16:48:19,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:19,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 16:48:19,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:48:19,101 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 11 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 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) [2021-12-22 16:48:19,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:19,220 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2021-12-22 16:48:19,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:48:19,221 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 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 43 [2021-12-22 16:48:19,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:19,221 INFO L225 Difference]: With dead ends: 93 [2021-12-22 16:48:19,222 INFO L226 Difference]: Without dead ends: 93 [2021-12-22 16:48:19,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-12-22 16:48:19,222 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 126 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:19,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 95 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:48:19,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-22 16:48:19,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-12-22 16:48:19,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 80 states have (on average 1.2125) internal successors, (97), 92 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) [2021-12-22 16:48:19,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2021-12-22 16:48:19,224 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 43 [2021-12-22 16:48:19,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:19,225 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2021-12-22 16:48:19,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 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) [2021-12-22 16:48:19,225 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2021-12-22 16:48:19,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 16:48:19,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:19,226 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:19,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:19,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:19,435 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:19,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:19,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1470341546, now seen corresponding path program 2 times [2021-12-22 16:48:19,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:19,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485560009] [2021-12-22 16:48:19,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:19,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 100 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:19,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:19,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485560009] [2021-12-22 16:48:19,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485560009] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:19,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212125628] [2021-12-22 16:48:19,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:48:19,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:19,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:19,654 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) [2021-12-22 16:48:19,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 16:48:19,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:48:19,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:48:19,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 16:48:19,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-22 16:48:20,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-22 16:48:20,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212125628] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:20,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:20,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7, 7] total 32 [2021-12-22 16:48:20,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746133387] [2021-12-22 16:48:20,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:20,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-22 16:48:20,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:20,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-22 16:48:20,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2021-12-22 16:48:20,460 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 34 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 33 states have internal predecessors, (117), 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) [2021-12-22 16:48:21,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:21,241 INFO L93 Difference]: Finished difference Result 292 states and 311 transitions. [2021-12-22 16:48:21,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 16:48:21,242 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 33 states have internal predecessors, (117), 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 57 [2021-12-22 16:48:21,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:21,244 INFO L225 Difference]: With dead ends: 292 [2021-12-22 16:48:21,244 INFO L226 Difference]: Without dead ends: 292 [2021-12-22 16:48:21,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=708, Invalid=2262, Unknown=0, NotChecked=0, Total=2970 [2021-12-22 16:48:21,246 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 3812 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3812 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:21,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3812 Valid, 394 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 16:48:21,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-12-22 16:48:21,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 122. [2021-12-22 16:48:21,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 121 states have internal predecessors, (136), 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) [2021-12-22 16:48:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 136 transitions. [2021-12-22 16:48:21,249 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 136 transitions. Word has length 57 [2021-12-22 16:48:21,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:21,249 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 136 transitions. [2021-12-22 16:48:21,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 33 states have internal predecessors, (117), 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) [2021-12-22 16:48:21,250 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 136 transitions. [2021-12-22 16:48:21,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-22 16:48:21,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:21,251 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:21,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:21,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:21,467 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:21,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:21,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1664052357, now seen corresponding path program 2 times [2021-12-22 16:48:21,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:21,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267325960] [2021-12-22 16:48:21,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:21,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:21,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-22 16:48:21,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:21,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267325960] [2021-12-22 16:48:21,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267325960] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:21,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604309312] [2021-12-22 16:48:21,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:48:21,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:21,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:21,593 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) [2021-12-22 16:48:21,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 16:48:21,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 16:48:21,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:48:21,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 16:48:21,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-12-22 16:48:22,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-12-22 16:48:22,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604309312] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:22,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:22,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2021-12-22 16:48:22,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859027116] [2021-12-22 16:48:22,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:22,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 16:48:22,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:22,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 16:48:22,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-12-22 16:48:22,804 INFO L87 Difference]: Start difference. First operand 122 states and 136 transitions. Second operand has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 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) [2021-12-22 16:48:23,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:23,129 INFO L93 Difference]: Finished difference Result 121 states and 129 transitions. [2021-12-22 16:48:23,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 16:48:23,129 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 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 58 [2021-12-22 16:48:23,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:23,130 INFO L225 Difference]: With dead ends: 121 [2021-12-22 16:48:23,131 INFO L226 Difference]: Without dead ends: 121 [2021-12-22 16:48:23,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2021-12-22 16:48:23,131 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 350 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:23,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 148 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:48:23,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-22 16:48:23,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-12-22 16:48:23,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 109 states have (on average 1.18348623853211) internal successors, (129), 120 states have internal predecessors, (129), 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) [2021-12-22 16:48:23,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 129 transitions. [2021-12-22 16:48:23,134 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 129 transitions. Word has length 58 [2021-12-22 16:48:23,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:23,134 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 129 transitions. [2021-12-22 16:48:23,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 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) [2021-12-22 16:48:23,135 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 129 transitions. [2021-12-22 16:48:23,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-22 16:48:23,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:23,135 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:23,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-22 16:48:23,352 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,SelfDestructingSolverStorable12 [2021-12-22 16:48:23,352 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:23,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:23,352 INFO L85 PathProgramCache]: Analyzing trace with hash 797853176, now seen corresponding path program 1 times [2021-12-22 16:48:23,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:23,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121943624] [2021-12-22 16:48:23,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:23,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-22 16:48:23,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:23,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121943624] [2021-12-22 16:48:23,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121943624] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:23,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:23,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:48:23,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864676647] [2021-12-22 16:48:23,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:23,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:48:23,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:23,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:48:23,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:48:23,417 INFO L87 Difference]: Start difference. First operand 121 states and 129 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 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) [2021-12-22 16:48:23,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:23,440 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2021-12-22 16:48:23,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:48:23,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 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 70 [2021-12-22 16:48:23,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:23,440 INFO L225 Difference]: With dead ends: 120 [2021-12-22 16:48:23,440 INFO L226 Difference]: Without dead ends: 120 [2021-12-22 16:48:23,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:48:23,441 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 106 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:23,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 52 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:23,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-22 16:48:23,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-12-22 16:48:23,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 109 states have (on average 1.1743119266055047) internal successors, (128), 119 states have internal predecessors, (128), 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) [2021-12-22 16:48:23,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2021-12-22 16:48:23,443 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 70 [2021-12-22 16:48:23,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:23,443 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2021-12-22 16:48:23,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 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) [2021-12-22 16:48:23,443 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2021-12-22 16:48:23,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-22 16:48:23,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:23,444 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:23,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 16:48:23,444 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:23,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:23,444 INFO L85 PathProgramCache]: Analyzing trace with hash 797853177, now seen corresponding path program 1 times [2021-12-22 16:48:23,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:23,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346449295] [2021-12-22 16:48:23,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:23,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-22 16:48:23,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:23,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346449295] [2021-12-22 16:48:23,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346449295] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:23,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637585109] [2021-12-22 16:48:23,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:23,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:23,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:23,508 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) [2021-12-22 16:48:23,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 16:48:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:23,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 16:48:23,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-22 16:48:23,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:23,771 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-22 16:48:23,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637585109] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:23,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:23,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2021-12-22 16:48:23,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600980210] [2021-12-22 16:48:23,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:23,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 16:48:23,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:23,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 16:48:23,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:48:23,773 INFO L87 Difference]: Start difference. First operand 120 states and 128 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 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) [2021-12-22 16:48:23,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:23,809 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2021-12-22 16:48:23,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 16:48:23,809 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 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 70 [2021-12-22 16:48:23,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:23,810 INFO L225 Difference]: With dead ends: 120 [2021-12-22 16:48:23,810 INFO L226 Difference]: Without dead ends: 120 [2021-12-22 16:48:23,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:48:23,811 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 41 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:23,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 174 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:23,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-22 16:48:23,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-12-22 16:48:23,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 109 states have (on average 1.1376146788990826) internal successors, (124), 119 states have internal predecessors, (124), 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) [2021-12-22 16:48:23,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2021-12-22 16:48:23,813 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 70 [2021-12-22 16:48:23,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:23,813 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2021-12-22 16:48:23,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 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) [2021-12-22 16:48:23,814 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2021-12-22 16:48:23,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-22 16:48:23,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:23,814 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:23,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:24,032 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,SelfDestructingSolverStorable14 [2021-12-22 16:48:24,033 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:24,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:24,033 INFO L85 PathProgramCache]: Analyzing trace with hash -713446614, now seen corresponding path program 3 times [2021-12-22 16:48:24,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:24,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322202473] [2021-12-22 16:48:24,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:24,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 199 proven. 46 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-22 16:48:24,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:24,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322202473] [2021-12-22 16:48:24,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322202473] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:24,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450151723] [2021-12-22 16:48:24,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 16:48:24,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:24,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:24,121 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) [2021-12-22 16:48:24,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 16:48:24,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 16:48:24,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:48:24,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 16:48:24,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-12-22 16:48:24,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:48:24,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450151723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:24,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:48:24,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 19 [2021-12-22 16:48:24,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678194223] [2021-12-22 16:48:24,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:24,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 16:48:24,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:24,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 16:48:24,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-12-22 16:48:24,719 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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) [2021-12-22 16:48:24,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:24,801 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2021-12-22 16:48:24,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 16:48:24,801 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 87 [2021-12-22 16:48:24,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:24,801 INFO L225 Difference]: With dead ends: 119 [2021-12-22 16:48:24,802 INFO L226 Difference]: Without dead ends: 119 [2021-12-22 16:48:24,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-12-22 16:48:24,802 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 123 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:24,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 66 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:24,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-22 16:48:24,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2021-12-22 16:48:24,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 108 states have (on average 1.1296296296296295) internal successors, (122), 117 states have internal predecessors, (122), 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) [2021-12-22 16:48:24,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2021-12-22 16:48:24,805 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 87 [2021-12-22 16:48:24,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:24,805 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2021-12-22 16:48:24,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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) [2021-12-22 16:48:24,805 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2021-12-22 16:48:24,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-22 16:48:24,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:24,806 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:24,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:25,023 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,SelfDestructingSolverStorable15 [2021-12-22 16:48:25,023 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:25,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:25,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1503565049, now seen corresponding path program 2 times [2021-12-22 16:48:25,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:25,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885642136] [2021-12-22 16:48:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:25,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:25,120 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-12-22 16:48:25,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:25,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885642136] [2021-12-22 16:48:25,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885642136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:25,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:25,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:48:25,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524405596] [2021-12-22 16:48:25,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:25,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:48:25,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:25,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:48:25,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:48:25,123 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-12-22 16:48:25,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:25,161 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2021-12-22 16:48:25,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:48:25,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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 90 [2021-12-22 16:48:25,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:25,162 INFO L225 Difference]: With dead ends: 125 [2021-12-22 16:48:25,162 INFO L226 Difference]: Without dead ends: 125 [2021-12-22 16:48:25,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:48:25,162 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 84 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:25,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 68 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:25,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-22 16:48:25,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2021-12-22 16:48:25,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 110 states have (on average 1.1272727272727272) internal successors, (124), 119 states have internal predecessors, (124), 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) [2021-12-22 16:48:25,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2021-12-22 16:48:25,164 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 90 [2021-12-22 16:48:25,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:25,164 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2021-12-22 16:48:25,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-12-22 16:48:25,165 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2021-12-22 16:48:25,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 16:48:25,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:25,165 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:25,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 16:48:25,165 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:25,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:25,165 INFO L85 PathProgramCache]: Analyzing trace with hash -634123742, now seen corresponding path program 1 times [2021-12-22 16:48:25,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:25,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399865536] [2021-12-22 16:48:25,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:25,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:25,215 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-12-22 16:48:25,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:25,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399865536] [2021-12-22 16:48:25,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399865536] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:25,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:25,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-22 16:48:25,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21619544] [2021-12-22 16:48:25,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:25,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:48:25,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:25,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:48:25,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:48:25,216 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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) [2021-12-22 16:48:25,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:25,226 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2021-12-22 16:48:25,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:48:25,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 91 [2021-12-22 16:48:25,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:25,227 INFO L225 Difference]: With dead ends: 119 [2021-12-22 16:48:25,227 INFO L226 Difference]: Without dead ends: 119 [2021-12-22 16:48:25,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:48:25,227 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:25,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 32 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:25,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-22 16:48:25,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-12-22 16:48:25,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 110 states have (on average 1.1181818181818182) internal successors, (123), 118 states have internal predecessors, (123), 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) [2021-12-22 16:48:25,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2021-12-22 16:48:25,229 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 91 [2021-12-22 16:48:25,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:25,229 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2021-12-22 16:48:25,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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) [2021-12-22 16:48:25,229 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2021-12-22 16:48:25,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 16:48:25,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:25,229 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:25,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 16:48:25,230 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:25,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:25,230 INFO L85 PathProgramCache]: Analyzing trace with hash -634123741, now seen corresponding path program 1 times [2021-12-22 16:48:25,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:25,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963892238] [2021-12-22 16:48:25,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:25,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-12-22 16:48:25,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:25,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963892238] [2021-12-22 16:48:25,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963892238] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:25,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:25,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:48:25,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739966556] [2021-12-22 16:48:25,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:25,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:48:25,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:25,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:48:25,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:48:25,302 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-12-22 16:48:25,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:25,321 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2021-12-22 16:48:25,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:48:25,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 91 [2021-12-22 16:48:25,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:25,322 INFO L225 Difference]: With dead ends: 122 [2021-12-22 16:48:25,322 INFO L226 Difference]: Without dead ends: 122 [2021-12-22 16:48:25,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:48:25,323 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:25,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 58 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:25,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-22 16:48:25,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2021-12-22 16:48:25,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 111 states have (on average 1.117117117117117) internal successors, (124), 119 states have internal predecessors, (124), 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) [2021-12-22 16:48:25,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2021-12-22 16:48:25,325 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 91 [2021-12-22 16:48:25,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:25,325 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2021-12-22 16:48:25,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-12-22 16:48:25,325 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2021-12-22 16:48:25,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-22 16:48:25,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:25,325 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:25,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 16:48:25,325 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:25,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:25,326 INFO L85 PathProgramCache]: Analyzing trace with hash 789303046, now seen corresponding path program 1 times [2021-12-22 16:48:25,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:25,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381092625] [2021-12-22 16:48:25,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:25,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-12-22 16:48:25,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:25,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381092625] [2021-12-22 16:48:25,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381092625] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:25,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136769784] [2021-12-22 16:48:25,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:25,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:25,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:25,407 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) [2021-12-22 16:48:25,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 16:48:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:25,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-22 16:48:25,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-12-22 16:48:26,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-12-22 16:48:26,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136769784] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:26,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:26,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2021-12-22 16:48:26,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972144527] [2021-12-22 16:48:26,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:26,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 16:48:26,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:26,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 16:48:26,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:48:26,383 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 14 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 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) [2021-12-22 16:48:26,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:26,568 INFO L93 Difference]: Finished difference Result 180 states and 188 transitions. [2021-12-22 16:48:26,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 16:48:26,568 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 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 [2021-12-22 16:48:26,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:26,569 INFO L225 Difference]: With dead ends: 180 [2021-12-22 16:48:26,569 INFO L226 Difference]: Without dead ends: 180 [2021-12-22 16:48:26,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-12-22 16:48:26,570 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 284 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:26,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 182 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:48:26,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-22 16:48:26,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 134. [2021-12-22 16:48:26,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 125 states have (on average 1.136) internal successors, (142), 133 states have internal predecessors, (142), 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) [2021-12-22 16:48:26,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 142 transitions. [2021-12-22 16:48:26,572 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 142 transitions. Word has length 95 [2021-12-22 16:48:26,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:26,572 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 142 transitions. [2021-12-22 16:48:26,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 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) [2021-12-22 16:48:26,573 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 142 transitions. [2021-12-22 16:48:26,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-22 16:48:26,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:26,573 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:26,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:26,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:26,786 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:26,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:26,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1301409354, now seen corresponding path program 1 times [2021-12-22 16:48:26,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:26,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194245347] [2021-12-22 16:48:26,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:26,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-12-22 16:48:26,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:26,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194245347] [2021-12-22 16:48:26,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194245347] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:26,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138280503] [2021-12-22 16:48:26,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:26,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:26,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:26,890 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) [2021-12-22 16:48:26,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 16:48:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:27,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 16:48:27,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-12-22 16:48:27,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-12-22 16:48:27,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138280503] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:27,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:27,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2021-12-22 16:48:27,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551989992] [2021-12-22 16:48:27,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:27,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 16:48:27,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:27,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 16:48:27,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:48:27,837 INFO L87 Difference]: Start difference. First operand 134 states and 142 transitions. Second operand has 11 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 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) [2021-12-22 16:48:27,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:27,975 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2021-12-22 16:48:27,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:48:27,976 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 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 96 [2021-12-22 16:48:27,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:27,977 INFO L225 Difference]: With dead ends: 135 [2021-12-22 16:48:27,977 INFO L226 Difference]: Without dead ends: 135 [2021-12-22 16:48:27,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-12-22 16:48:27,977 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 104 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:27,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 89 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:48:27,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-22 16:48:27,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-12-22 16:48:27,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 126 states have (on average 1.1031746031746033) internal successors, (139), 134 states have internal predecessors, (139), 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) [2021-12-22 16:48:27,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2021-12-22 16:48:27,980 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 96 [2021-12-22 16:48:27,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:27,980 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2021-12-22 16:48:27,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 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) [2021-12-22 16:48:27,981 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2021-12-22 16:48:27,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-22 16:48:27,981 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:27,981 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:27,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:28,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-22 16:48:28,198 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:28,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:28,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1508601145, now seen corresponding path program 2 times [2021-12-22 16:48:28,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:28,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427246840] [2021-12-22 16:48:28,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:28,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-12-22 16:48:28,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:28,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427246840] [2021-12-22 16:48:28,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427246840] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:28,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247922949] [2021-12-22 16:48:28,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:48:28,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:28,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:28,355 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) [2021-12-22 16:48:28,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 16:48:28,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:48:28,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:48:28,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 16:48:28,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:29,204 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-12-22 16:48:29,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:48:29,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247922949] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:29,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:48:29,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 15 [2021-12-22 16:48:29,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265795027] [2021-12-22 16:48:29,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:29,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 16:48:29,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:29,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 16:48:29,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-12-22 16:48:29,206 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) [2021-12-22 16:48:29,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:29,348 INFO L93 Difference]: Finished difference Result 136 states and 140 transitions. [2021-12-22 16:48:29,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 16:48:29,349 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) Word has length 110 [2021-12-22 16:48:29,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:29,349 INFO L225 Difference]: With dead ends: 136 [2021-12-22 16:48:29,349 INFO L226 Difference]: Without dead ends: 136 [2021-12-22 16:48:29,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-12-22 16:48:29,350 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 144 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:29,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 91 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:29,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-22 16:48:29,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2021-12-22 16:48:29,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 126 states have (on average 1.0952380952380953) internal successors, (138), 133 states have internal predecessors, (138), 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) [2021-12-22 16:48:29,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2021-12-22 16:48:29,354 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 110 [2021-12-22 16:48:29,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:29,354 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2021-12-22 16:48:29,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) [2021-12-22 16:48:29,355 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2021-12-22 16:48:29,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-22 16:48:29,355 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:29,355 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:29,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:29,567 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,SelfDestructingSolverStorable21 [2021-12-22 16:48:29,567 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:29,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:29,568 INFO L85 PathProgramCache]: Analyzing trace with hash -478004765, now seen corresponding path program 2 times [2021-12-22 16:48:29,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:29,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434891623] [2021-12-22 16:48:29,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:29,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-12-22 16:48:29,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:29,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434891623] [2021-12-22 16:48:29,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434891623] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:29,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:29,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 16:48:29,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104459084] [2021-12-22 16:48:29,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:29,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 16:48:29,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:29,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 16:48:29,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:48:29,724 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand has 9 states, 8 states have (on average 4.875) internal successors, (39), 8 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) [2021-12-22 16:48:29,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:29,764 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2021-12-22 16:48:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 16:48:29,764 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.875) internal successors, (39), 8 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) Word has length 111 [2021-12-22 16:48:29,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:29,765 INFO L225 Difference]: With dead ends: 135 [2021-12-22 16:48:29,765 INFO L226 Difference]: Without dead ends: 135 [2021-12-22 16:48:29,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:48:29,765 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 82 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:29,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 75 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:29,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-22 16:48:29,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2021-12-22 16:48:29,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 124 states have (on average 1.0887096774193548) internal successors, (135), 130 states have internal predecessors, (135), 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) [2021-12-22 16:48:29,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2021-12-22 16:48:29,767 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 111 [2021-12-22 16:48:29,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:29,768 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2021-12-22 16:48:29,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.875) internal successors, (39), 8 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) [2021-12-22 16:48:29,768 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2021-12-22 16:48:29,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-22 16:48:29,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:29,768 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:29,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-22 16:48:29,768 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:29,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:29,769 INFO L85 PathProgramCache]: Analyzing trace with hash 197443008, now seen corresponding path program 1 times [2021-12-22 16:48:29,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:29,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023425974] [2021-12-22 16:48:29,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:29,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2021-12-22 16:48:29,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:29,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023425974] [2021-12-22 16:48:29,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023425974] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:29,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:29,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:48:29,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480863551] [2021-12-22 16:48:29,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:29,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:48:29,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:29,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:48:29,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:48:29,807 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 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) [2021-12-22 16:48:29,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:29,829 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2021-12-22 16:48:29,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:48:29,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 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 113 [2021-12-22 16:48:29,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:29,830 INFO L225 Difference]: With dead ends: 130 [2021-12-22 16:48:29,830 INFO L226 Difference]: Without dead ends: 130 [2021-12-22 16:48:29,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:48:29,830 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 77 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:29,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 59 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:29,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-22 16:48:29,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-12-22 16:48:29,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 124 states have (on average 1.0806451612903225) internal successors, (134), 129 states have internal predecessors, (134), 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) [2021-12-22 16:48:29,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2021-12-22 16:48:29,833 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 113 [2021-12-22 16:48:29,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:29,833 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2021-12-22 16:48:29,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 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) [2021-12-22 16:48:29,833 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2021-12-22 16:48:29,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-22 16:48:29,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:29,834 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:29,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-22 16:48:29,834 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:29,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:29,835 INFO L85 PathProgramCache]: Analyzing trace with hash 197443009, now seen corresponding path program 1 times [2021-12-22 16:48:29,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:29,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196797278] [2021-12-22 16:48:29,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:29,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-12-22 16:48:29,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:29,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196797278] [2021-12-22 16:48:29,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196797278] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:29,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854669278] [2021-12-22 16:48:29,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:29,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:29,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:29,881 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) [2021-12-22 16:48:29,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 16:48:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:30,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 16:48:30,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-12-22 16:48:30,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-12-22 16:48:30,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854669278] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:30,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:30,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-22 16:48:30,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668743037] [2021-12-22 16:48:30,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:30,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 16:48:30,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:30,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 16:48:30,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:48:30,265 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 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) [2021-12-22 16:48:30,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:30,300 INFO L93 Difference]: Finished difference Result 160 states and 164 transitions. [2021-12-22 16:48:30,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 16:48:30,301 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 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 113 [2021-12-22 16:48:30,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:30,301 INFO L225 Difference]: With dead ends: 160 [2021-12-22 16:48:30,301 INFO L226 Difference]: Without dead ends: 160 [2021-12-22 16:48:30,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:48:30,302 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 60 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:30,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 85 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:30,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-22 16:48:30,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-12-22 16:48:30,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.0649350649350648) internal successors, (164), 159 states have internal predecessors, (164), 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) [2021-12-22 16:48:30,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2021-12-22 16:48:30,304 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 113 [2021-12-22 16:48:30,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:30,305 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2021-12-22 16:48:30,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 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) [2021-12-22 16:48:30,305 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2021-12-22 16:48:30,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-22 16:48:30,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:30,306 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:30,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:30,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:30,515 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:30,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:30,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1282766495, now seen corresponding path program 2 times [2021-12-22 16:48:30,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:30,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407205577] [2021-12-22 16:48:30,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:30,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:30,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2021-12-22 16:48:30,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:30,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407205577] [2021-12-22 16:48:30,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407205577] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:30,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:30,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:48:30,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075759473] [2021-12-22 16:48:30,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:30,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:48:30,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:30,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:48:30,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:48:30,612 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2021-12-22 16:48:30,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:30,668 INFO L93 Difference]: Finished difference Result 167 states and 171 transitions. [2021-12-22 16:48:30,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:48:30,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 143 [2021-12-22 16:48:30,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:30,670 INFO L225 Difference]: With dead ends: 167 [2021-12-22 16:48:30,670 INFO L226 Difference]: Without dead ends: 167 [2021-12-22 16:48:30,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:48:30,670 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 60 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:30,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 70 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:30,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-22 16:48:30,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 162. [2021-12-22 16:48:30,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 156 states have (on average 1.064102564102564) internal successors, (166), 161 states have internal predecessors, (166), 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) [2021-12-22 16:48:30,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2021-12-22 16:48:30,674 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 143 [2021-12-22 16:48:30,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:30,674 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2021-12-22 16:48:30,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2021-12-22 16:48:30,675 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2021-12-22 16:48:30,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-22 16:48:30,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:30,675 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:30,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-22 16:48:30,675 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:30,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:30,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1111055663, now seen corresponding path program 1 times [2021-12-22 16:48:30,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:30,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302942663] [2021-12-22 16:48:30,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:30,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:30,735 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2021-12-22 16:48:30,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:30,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302942663] [2021-12-22 16:48:30,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302942663] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:30,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:30,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-22 16:48:30,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346153031] [2021-12-22 16:48:30,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:30,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:48:30,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:30,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:48:30,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:48:30,737 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand has 3 states, 2 states have (on average 13.5) internal successors, (27), 2 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) [2021-12-22 16:48:30,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:30,746 INFO L93 Difference]: Finished difference Result 161 states and 165 transitions. [2021-12-22 16:48:30,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:48:30,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 2 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) Word has length 144 [2021-12-22 16:48:30,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:30,747 INFO L225 Difference]: With dead ends: 161 [2021-12-22 16:48:30,747 INFO L226 Difference]: Without dead ends: 161 [2021-12-22 16:48:30,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:48:30,748 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:30,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 30 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:30,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-22 16:48:30,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-12-22 16:48:30,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0576923076923077) internal successors, (165), 160 states have internal predecessors, (165), 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) [2021-12-22 16:48:30,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 165 transitions. [2021-12-22 16:48:30,754 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 165 transitions. Word has length 144 [2021-12-22 16:48:30,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:30,754 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 165 transitions. [2021-12-22 16:48:30,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 2 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) [2021-12-22 16:48:30,755 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 165 transitions. [2021-12-22 16:48:30,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-22 16:48:30,755 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:30,756 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:30,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-22 16:48:30,756 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:30,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:30,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1111055662, now seen corresponding path program 1 times [2021-12-22 16:48:30,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:30,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440189326] [2021-12-22 16:48:30,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:30,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:30,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2021-12-22 16:48:30,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:30,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440189326] [2021-12-22 16:48:30,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440189326] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:30,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:30,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:48:30,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157410786] [2021-12-22 16:48:30,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:30,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:48:30,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:30,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:48:30,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:48:30,985 INFO L87 Difference]: Start difference. First operand 161 states and 165 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 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) [2021-12-22 16:48:31,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:31,004 INFO L93 Difference]: Finished difference Result 164 states and 168 transitions. [2021-12-22 16:48:31,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:48:31,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 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) Word has length 144 [2021-12-22 16:48:31,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:31,005 INFO L225 Difference]: With dead ends: 164 [2021-12-22 16:48:31,005 INFO L226 Difference]: Without dead ends: 164 [2021-12-22 16:48:31,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:48:31,005 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 24 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:31,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 54 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:31,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-22 16:48:31,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2021-12-22 16:48:31,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.0573248407643312) internal successors, (166), 161 states have internal predecessors, (166), 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) [2021-12-22 16:48:31,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2021-12-22 16:48:31,008 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 144 [2021-12-22 16:48:31,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:31,008 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2021-12-22 16:48:31,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 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) [2021-12-22 16:48:31,008 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2021-12-22 16:48:31,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-22 16:48:31,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:31,009 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:31,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-22 16:48:31,009 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:31,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:31,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1631536629, now seen corresponding path program 1 times [2021-12-22 16:48:31,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:31,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028145887] [2021-12-22 16:48:31,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:31,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:31,126 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2021-12-22 16:48:31,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:31,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028145887] [2021-12-22 16:48:31,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028145887] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:31,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258762795] [2021-12-22 16:48:31,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:31,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:31,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:31,128 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) [2021-12-22 16:48:31,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-22 16:48:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:31,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-22 16:48:31,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2021-12-22 16:48:32,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2021-12-22 16:48:32,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258762795] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:32,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:32,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2021-12-22 16:48:32,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704056597] [2021-12-22 16:48:32,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:32,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 16:48:32,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:32,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 16:48:32,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:48:32,565 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand has 14 states, 13 states have (on average 7.153846153846154) internal successors, (93), 13 states have internal predecessors, (93), 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) [2021-12-22 16:48:32,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:32,725 INFO L93 Difference]: Finished difference Result 200 states and 206 transitions. [2021-12-22 16:48:32,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 16:48:32,726 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 7.153846153846154) internal successors, (93), 13 states have internal predecessors, (93), 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 148 [2021-12-22 16:48:32,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:32,726 INFO L225 Difference]: With dead ends: 200 [2021-12-22 16:48:32,726 INFO L226 Difference]: Without dead ends: 200 [2021-12-22 16:48:32,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-12-22 16:48:32,727 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 238 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:32,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 147 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:48:32,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-22 16:48:32,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 176. [2021-12-22 16:48:32,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.0760233918128654) internal successors, (184), 175 states have internal predecessors, (184), 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) [2021-12-22 16:48:32,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 184 transitions. [2021-12-22 16:48:32,730 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 184 transitions. Word has length 148 [2021-12-22 16:48:32,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:32,730 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 184 transitions. [2021-12-22 16:48:32,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 7.153846153846154) internal successors, (93), 13 states have internal predecessors, (93), 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) [2021-12-22 16:48:32,730 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 184 transitions. [2021-12-22 16:48:32,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-22 16:48:32,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:32,731 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:32,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:32,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-22 16:48:32,947 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:32,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:32,948 INFO L85 PathProgramCache]: Analyzing trace with hash -961972034, now seen corresponding path program 1 times [2021-12-22 16:48:32,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:32,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352195871] [2021-12-22 16:48:32,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:32,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:33,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2021-12-22 16:48:33,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:33,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352195871] [2021-12-22 16:48:33,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352195871] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:33,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368959508] [2021-12-22 16:48:33,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:33,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:33,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:33,113 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) [2021-12-22 16:48:33,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-22 16:48:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:33,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 16:48:33,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2021-12-22 16:48:34,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:34,524 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2021-12-22 16:48:34,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368959508] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:34,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:34,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2021-12-22 16:48:34,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067732740] [2021-12-22 16:48:34,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:34,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 16:48:34,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:34,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 16:48:34,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:48:34,526 INFO L87 Difference]: Start difference. First operand 176 states and 184 transitions. Second operand has 11 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2021-12-22 16:48:34,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:34,612 INFO L93 Difference]: Finished difference Result 177 states and 181 transitions. [2021-12-22 16:48:34,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:48:34,613 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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 149 [2021-12-22 16:48:34,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:34,613 INFO L225 Difference]: With dead ends: 177 [2021-12-22 16:48:34,613 INFO L226 Difference]: Without dead ends: 177 [2021-12-22 16:48:34,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:48:34,614 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 40 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:34,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 154 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:48:34,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-22 16:48:34,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-12-22 16:48:34,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.052325581395349) internal successors, (181), 176 states have internal predecessors, (181), 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) [2021-12-22 16:48:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2021-12-22 16:48:34,617 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 149 [2021-12-22 16:48:34,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:34,617 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2021-12-22 16:48:34,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 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) [2021-12-22 16:48:34,617 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2021-12-22 16:48:34,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-22 16:48:34,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:34,617 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:34,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:34,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:34,818 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:34,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:34,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1324245601, now seen corresponding path program 2 times [2021-12-22 16:48:34,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:34,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085693743] [2021-12-22 16:48:34,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:34,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:35,010 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2021-12-22 16:48:35,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:35,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085693743] [2021-12-22 16:48:35,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085693743] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:35,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10436459] [2021-12-22 16:48:35,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:48:35,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:35,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:35,012 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) [2021-12-22 16:48:35,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-22 16:48:35,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:48:35,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:48:35,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 16:48:35,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2021-12-22 16:48:36,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:36,632 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2021-12-22 16:48:36,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10436459] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:36,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:36,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2021-12-22 16:48:36,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515642626] [2021-12-22 16:48:36,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:36,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-22 16:48:36,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:36,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-22 16:48:36,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-12-22 16:48:36,633 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand has 23 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 22 states have internal predecessors, (138), 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) [2021-12-22 16:48:37,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:37,153 INFO L93 Difference]: Finished difference Result 266 states and 275 transitions. [2021-12-22 16:48:37,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 16:48:37,154 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 22 states have internal predecessors, (138), 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 163 [2021-12-22 16:48:37,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:37,154 INFO L225 Difference]: With dead ends: 266 [2021-12-22 16:48:37,154 INFO L226 Difference]: Without dead ends: 266 [2021-12-22 16:48:37,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=282, Invalid=840, Unknown=0, NotChecked=0, Total=1122 [2021-12-22 16:48:37,155 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 598 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:37,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 330 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:48:37,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-22 16:48:37,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 206. [2021-12-22 16:48:37,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 201 states have (on average 1.0945273631840795) internal successors, (220), 205 states have internal predecessors, (220), 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) [2021-12-22 16:48:37,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 220 transitions. [2021-12-22 16:48:37,158 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 220 transitions. Word has length 163 [2021-12-22 16:48:37,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:37,159 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 220 transitions. [2021-12-22 16:48:37,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 22 states have internal predecessors, (138), 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) [2021-12-22 16:48:37,159 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 220 transitions. [2021-12-22 16:48:37,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-22 16:48:37,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:37,160 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:37,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:37,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:37,378 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:37,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:37,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1898059310, now seen corresponding path program 2 times [2021-12-22 16:48:37,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:37,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552802535] [2021-12-22 16:48:37,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:37,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2021-12-22 16:48:37,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:37,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552802535] [2021-12-22 16:48:37,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552802535] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:37,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145998143] [2021-12-22 16:48:37,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:48:37,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:37,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:37,533 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) [2021-12-22 16:48:37,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-22 16:48:37,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 16:48:37,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:48:37,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 16:48:37,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2021-12-22 16:48:38,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:40,271 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2021-12-22 16:48:40,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145998143] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:40,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:40,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2021-12-22 16:48:40,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233704070] [2021-12-22 16:48:40,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:40,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 16:48:40,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:40,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 16:48:40,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-12-22 16:48:40,273 INFO L87 Difference]: Start difference. First operand 206 states and 220 transitions. Second operand has 18 states, 17 states have (on average 6.529411764705882) internal successors, (111), 17 states have internal predecessors, (111), 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) [2021-12-22 16:48:40,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:40,551 INFO L93 Difference]: Finished difference Result 205 states and 213 transitions. [2021-12-22 16:48:40,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 16:48:40,551 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 6.529411764705882) internal successors, (111), 17 states have internal predecessors, (111), 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 164 [2021-12-22 16:48:40,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:40,552 INFO L225 Difference]: With dead ends: 205 [2021-12-22 16:48:40,552 INFO L226 Difference]: Without dead ends: 205 [2021-12-22 16:48:40,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2021-12-22 16:48:40,554 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 245 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:40,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 127 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:48:40,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-22 16:48:40,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2021-12-22 16:48:40,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 201 states have (on average 1.0597014925373134) internal successors, (213), 204 states have internal predecessors, (213), 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) [2021-12-22 16:48:40,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 213 transitions. [2021-12-22 16:48:40,557 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 213 transitions. Word has length 164 [2021-12-22 16:48:40,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:40,558 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 213 transitions. [2021-12-22 16:48:40,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 6.529411764705882) internal successors, (111), 17 states have internal predecessors, (111), 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) [2021-12-22 16:48:40,558 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 213 transitions. [2021-12-22 16:48:40,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-22 16:48:40,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:40,558 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:40,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:40,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:40,775 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:40,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:40,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1304075185, now seen corresponding path program 1 times [2021-12-22 16:48:40,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:40,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262097948] [2021-12-22 16:48:40,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:40,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2021-12-22 16:48:40,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:40,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262097948] [2021-12-22 16:48:40,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262097948] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:40,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:40,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:48:40,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226409650] [2021-12-22 16:48:40,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:40,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:48:40,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:40,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:48:40,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:48:40,828 INFO L87 Difference]: Start difference. First operand 205 states and 213 transitions. Second operand has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 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) [2021-12-22 16:48:40,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:40,860 INFO L93 Difference]: Finished difference Result 204 states and 212 transitions. [2021-12-22 16:48:40,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:48:40,860 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 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 176 [2021-12-22 16:48:40,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:40,861 INFO L225 Difference]: With dead ends: 204 [2021-12-22 16:48:40,861 INFO L226 Difference]: Without dead ends: 204 [2021-12-22 16:48:40,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:48:40,862 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 50 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:40,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 72 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:40,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-12-22 16:48:40,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2021-12-22 16:48:40,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 201 states have (on average 1.054726368159204) internal successors, (212), 203 states have internal predecessors, (212), 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) [2021-12-22 16:48:40,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 212 transitions. [2021-12-22 16:48:40,864 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 212 transitions. Word has length 176 [2021-12-22 16:48:40,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:40,864 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 212 transitions. [2021-12-22 16:48:40,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 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) [2021-12-22 16:48:40,864 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 212 transitions. [2021-12-22 16:48:40,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-22 16:48:40,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:40,865 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:40,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-22 16:48:40,865 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:40,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:40,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1304075184, now seen corresponding path program 1 times [2021-12-22 16:48:40,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:40,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111384179] [2021-12-22 16:48:40,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:40,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2021-12-22 16:48:40,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:40,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111384179] [2021-12-22 16:48:40,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111384179] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:40,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737028975] [2021-12-22 16:48:40,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:40,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:40,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:40,968 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) [2021-12-22 16:48:40,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-22 16:48:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:41,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 16:48:41,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2021-12-22 16:48:41,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2021-12-22 16:48:41,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737028975] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:41,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:41,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2021-12-22 16:48:41,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577678362] [2021-12-22 16:48:41,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:41,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 16:48:41,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:41,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 16:48:41,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:48:41,522 INFO L87 Difference]: Start difference. First operand 204 states and 212 transitions. Second operand has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 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) [2021-12-22 16:48:41,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:41,640 INFO L93 Difference]: Finished difference Result 204 states and 208 transitions. [2021-12-22 16:48:41,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 16:48:41,640 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 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 176 [2021-12-22 16:48:41,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:41,641 INFO L225 Difference]: With dead ends: 204 [2021-12-22 16:48:41,641 INFO L226 Difference]: Without dead ends: 204 [2021-12-22 16:48:41,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 348 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2021-12-22 16:48:41,641 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 96 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:41,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 193 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:48:41,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-12-22 16:48:41,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2021-12-22 16:48:41,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 201 states have (on average 1.0348258706467661) internal successors, (208), 203 states have internal predecessors, (208), 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) [2021-12-22 16:48:41,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 208 transitions. [2021-12-22 16:48:41,644 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 208 transitions. Word has length 176 [2021-12-22 16:48:41,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:41,644 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 208 transitions. [2021-12-22 16:48:41,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 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) [2021-12-22 16:48:41,644 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 208 transitions. [2021-12-22 16:48:41,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-22 16:48:41,644 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:41,645 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:41,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:41,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:41,851 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:41,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:41,853 INFO L85 PathProgramCache]: Analyzing trace with hash -457705503, now seen corresponding path program 3 times [2021-12-22 16:48:41,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:41,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611283046] [2021-12-22 16:48:41,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:41,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:41,954 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 199 proven. 46 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2021-12-22 16:48:41,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:41,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611283046] [2021-12-22 16:48:41,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611283046] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:41,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962243483] [2021-12-22 16:48:41,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 16:48:41,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:41,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:41,956 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) [2021-12-22 16:48:41,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-22 16:48:42,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 16:48:42,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:48:42,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 16:48:42,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:43,060 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2021-12-22 16:48:43,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:48:43,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962243483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:43,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:48:43,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 19 [2021-12-22 16:48:43,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764559256] [2021-12-22 16:48:43,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:43,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 16:48:43,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:43,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 16:48:43,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-12-22 16:48:43,062 INFO L87 Difference]: Start difference. First operand 204 states and 208 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 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) [2021-12-22 16:48:43,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:43,158 INFO L93 Difference]: Finished difference Result 203 states and 207 transitions. [2021-12-22 16:48:43,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 16:48:43,159 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 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) Word has length 193 [2021-12-22 16:48:43,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:43,159 INFO L225 Difference]: With dead ends: 203 [2021-12-22 16:48:43,159 INFO L226 Difference]: Without dead ends: 203 [2021-12-22 16:48:43,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-12-22 16:48:43,160 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 71 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:43,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 83 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:43,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-22 16:48:43,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2021-12-22 16:48:43,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 200 states have (on average 1.03) internal successors, (206), 201 states have internal predecessors, (206), 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) [2021-12-22 16:48:43,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 206 transitions. [2021-12-22 16:48:43,163 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 206 transitions. Word has length 193 [2021-12-22 16:48:43,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:43,164 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 206 transitions. [2021-12-22 16:48:43,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 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) [2021-12-22 16:48:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 206 transitions. [2021-12-22 16:48:43,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-22 16:48:43,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:43,165 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:43,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:43,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-22 16:48:43,379 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:43,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:43,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1015065424, now seen corresponding path program 2 times [2021-12-22 16:48:43,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:43,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029260594] [2021-12-22 16:48:43,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:43,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 164 proven. 71 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2021-12-22 16:48:43,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:43,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029260594] [2021-12-22 16:48:43,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029260594] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:43,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615778195] [2021-12-22 16:48:43,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:48:43,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:43,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:43,557 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:48:43,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-22 16:48:43,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 16:48:43,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:48:43,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 16:48:43,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2021-12-22 16:48:44,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:48:44,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615778195] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:44,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:48:44,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 17 [2021-12-22 16:48:44,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168330930] [2021-12-22 16:48:44,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:44,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:48:44,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:44,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:48:44,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-12-22 16:48:44,624 INFO L87 Difference]: Start difference. First operand 202 states and 206 transitions. Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 4 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) [2021-12-22 16:48:44,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:44,661 INFO L93 Difference]: Finished difference Result 206 states and 210 transitions. [2021-12-22 16:48:44,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:48:44,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 4 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) Word has length 196 [2021-12-22 16:48:44,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:44,662 INFO L225 Difference]: With dead ends: 206 [2021-12-22 16:48:44,662 INFO L226 Difference]: Without dead ends: 206 [2021-12-22 16:48:44,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-12-22 16:48:44,663 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:44,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 72 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:44,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-12-22 16:48:44,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2021-12-22 16:48:44,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 202 states have (on average 1.0297029702970297) internal successors, (208), 203 states have internal predecessors, (208), 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) [2021-12-22 16:48:44,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 208 transitions. [2021-12-22 16:48:44,665 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 208 transitions. Word has length 196 [2021-12-22 16:48:44,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:44,665 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 208 transitions. [2021-12-22 16:48:44,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 4 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) [2021-12-22 16:48:44,665 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 208 transitions. [2021-12-22 16:48:44,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-22 16:48:44,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:44,666 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:44,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-22 16:48:44,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-22 16:48:44,883 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:44,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:44,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1789805779, now seen corresponding path program 1 times [2021-12-22 16:48:44,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:44,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725402725] [2021-12-22 16:48:44,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:44,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 164 proven. 73 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2021-12-22 16:48:45,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:45,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725402725] [2021-12-22 16:48:45,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725402725] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:45,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870198186] [2021-12-22 16:48:45,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:45,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:45,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:45,067 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:48:45,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-22 16:48:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:45,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-22 16:48:45,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:46,313 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2021-12-22 16:48:46,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:47,010 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2021-12-22 16:48:47,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870198186] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:47,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:47,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 4, 4] total 23 [2021-12-22 16:48:47,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956020677] [2021-12-22 16:48:47,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:47,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 16:48:47,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:47,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 16:48:47,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-12-22 16:48:47,012 INFO L87 Difference]: Start difference. First operand 204 states and 208 transitions. Second operand has 25 states, 24 states have (on average 6.625) internal successors, (159), 24 states have internal predecessors, (159), 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) [2021-12-22 16:48:47,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:47,404 INFO L93 Difference]: Finished difference Result 222 states and 226 transitions. [2021-12-22 16:48:47,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 16:48:47,405 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 6.625) internal successors, (159), 24 states have internal predecessors, (159), 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 200 [2021-12-22 16:48:47,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:47,405 INFO L225 Difference]: With dead ends: 222 [2021-12-22 16:48:47,405 INFO L226 Difference]: Without dead ends: 222 [2021-12-22 16:48:47,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2021-12-22 16:48:47,406 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 258 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:47,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 264 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:48:47,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-12-22 16:48:47,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 216. [2021-12-22 16:48:47,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 214 states have (on average 1.0373831775700935) internal successors, (222), 215 states have internal predecessors, (222), 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) [2021-12-22 16:48:47,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 222 transitions. [2021-12-22 16:48:47,409 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 222 transitions. Word has length 200 [2021-12-22 16:48:47,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:47,409 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 222 transitions. [2021-12-22 16:48:47,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 6.625) internal successors, (159), 24 states have internal predecessors, (159), 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) [2021-12-22 16:48:47,409 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 222 transitions. [2021-12-22 16:48:47,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-22 16:48:47,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:47,409 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:47,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:47,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-22 16:48:47,619 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:47,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:47,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2045825105, now seen corresponding path program 1 times [2021-12-22 16:48:47,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:47,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142060987] [2021-12-22 16:48:47,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:47,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:47,673 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 856 trivial. 0 not checked. [2021-12-22 16:48:47,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:47,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142060987] [2021-12-22 16:48:47,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142060987] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:47,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:47,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:48:47,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105223407] [2021-12-22 16:48:47,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:47,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:48:47,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:47,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:48:47,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:48:47,675 INFO L87 Difference]: Start difference. First operand 216 states and 222 transitions. Second operand has 3 states, 2 states have (on average 19.5) internal successors, (39), 3 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) [2021-12-22 16:48:47,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:47,682 INFO L93 Difference]: Finished difference Result 215 states and 221 transitions. [2021-12-22 16:48:47,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:48:47,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 19.5) internal successors, (39), 3 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) Word has length 205 [2021-12-22 16:48:47,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:47,683 INFO L225 Difference]: With dead ends: 215 [2021-12-22 16:48:47,683 INFO L226 Difference]: Without dead ends: 213 [2021-12-22 16:48:47,683 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 [2021-12-22 16:48:47,684 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:47,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 31 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:47,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-12-22 16:48:47,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2021-12-22 16:48:47,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.0235849056603774) internal successors, (217), 212 states have internal predecessors, (217), 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) [2021-12-22 16:48:47,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 217 transitions. [2021-12-22 16:48:47,696 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 217 transitions. Word has length 205 [2021-12-22 16:48:47,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:47,697 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 217 transitions. [2021-12-22 16:48:47,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 19.5) internal successors, (39), 3 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) [2021-12-22 16:48:47,697 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 217 transitions. [2021-12-22 16:48:47,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-12-22 16:48:47,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:47,698 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:47,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-22 16:48:47,699 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-22 16:48:47,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:47,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1388525660, now seen corresponding path program 2 times [2021-12-22 16:48:47,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:47,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173711616] [2021-12-22 16:48:47,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:47,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 164 proven. 103 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2021-12-22 16:48:47,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:47,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173711616] [2021-12-22 16:48:47,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173711616] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:47,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641249812] [2021-12-22 16:48:47,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:48:47,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:47,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:47,919 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:48:47,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-22 16:48:48,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:48:48,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:48:48,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 16:48:48,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:49,272 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2021-12-22 16:48:49,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:48:49,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641249812] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:49,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:48:49,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 26 [2021-12-22 16:48:49,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543886026] [2021-12-22 16:48:49,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:49,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 16:48:49,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:49,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 16:48:49,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-12-22 16:48:49,274 INFO L87 Difference]: Start difference. First operand 213 states and 217 transitions. Second operand has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 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) [2021-12-22 16:48:49,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:49,415 INFO L93 Difference]: Finished difference Result 214 states and 218 transitions. [2021-12-22 16:48:49,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 16:48:49,415 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 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 212 [2021-12-22 16:48:49,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:49,416 INFO L225 Difference]: With dead ends: 214 [2021-12-22 16:48:49,416 INFO L226 Difference]: Without dead ends: 0 [2021-12-22 16:48:49,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-12-22 16:48:49,416 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:49,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 98 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:49,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-22 16:48:49,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-22 16:48:49,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:48:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-22 16:48:49,417 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 212 [2021-12-22 16:48:49,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:49,417 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-22 16:48:49,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 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) [2021-12-22 16:48:49,417 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-22 16:48:49,417 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-22 16:48:49,419 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (16 of 17 remaining) [2021-12-22 16:48:49,419 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (15 of 17 remaining) [2021-12-22 16:48:49,419 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (14 of 17 remaining) [2021-12-22 16:48:49,419 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (13 of 17 remaining) [2021-12-22 16:48:49,419 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (12 of 17 remaining) [2021-12-22 16:48:49,419 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (11 of 17 remaining) [2021-12-22 16:48:49,419 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (10 of 17 remaining) [2021-12-22 16:48:49,419 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION (9 of 17 remaining) [2021-12-22 16:48:49,419 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATION (8 of 17 remaining) [2021-12-22 16:48:49,419 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATION (7 of 17 remaining) [2021-12-22 16:48:49,420 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATION (6 of 17 remaining) [2021-12-22 16:48:49,420 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATION (5 of 17 remaining) [2021-12-22 16:48:49,420 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATION (4 of 17 remaining) [2021-12-22 16:48:49,420 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATION (3 of 17 remaining) [2021-12-22 16:48:49,420 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATION (2 of 17 remaining) [2021-12-22 16:48:49,420 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATION (1 of 17 remaining) [2021-12-22 16:48:49,420 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK (0 of 17 remaining) [2021-12-22 16:48:49,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:49,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:49,637 INFO L732 BasicCegarLoop]: Path program histogram: [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:49,640 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 16:48:49,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 04:48:49 BoogieIcfgContainer [2021-12-22 16:48:49,642 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 16:48:49,643 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 16:48:49,643 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 16:48:49,643 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 16:48:49,643 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:48:13" (3/4) ... [2021-12-22 16:48:49,645 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-22 16:48:49,652 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-12-22 16:48:49,652 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-22 16:48:49,652 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-12-22 16:48:49,652 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-22 16:48:49,675 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-22 16:48:49,675 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 16:48:49,676 INFO L158 Benchmark]: Toolchain (without parser) took 36575.85ms. Allocated memory was 104.9MB in the beginning and 268.4MB in the end (delta: 163.6MB). Free memory was 72.3MB in the beginning and 225.4MB in the end (delta: -153.1MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. [2021-12-22 16:48:49,676 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 71.3MB. Free memory was 29.1MB in the beginning and 29.0MB in the end (delta: 41.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 16:48:49,676 INFO L158 Benchmark]: CACSL2BoogieTranslator took 172.35ms. Allocated memory is still 104.9MB. Free memory was 72.1MB in the beginning and 81.0MB in the end (delta: -8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 16:48:49,676 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.71ms. Allocated memory is still 104.9MB. Free memory was 81.0MB in the beginning and 79.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 16:48:49,676 INFO L158 Benchmark]: Boogie Preprocessor took 44.06ms. Allocated memory is still 104.9MB. Free memory was 79.3MB in the beginning and 78.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 16:48:49,676 INFO L158 Benchmark]: RCFGBuilder took 310.80ms. Allocated memory is still 104.9MB. Free memory was 78.0MB in the beginning and 64.7MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-22 16:48:49,676 INFO L158 Benchmark]: TraceAbstraction took 35977.37ms. Allocated memory was 104.9MB in the beginning and 268.4MB in the end (delta: 163.6MB). Free memory was 64.3MB in the beginning and 229.6MB in the end (delta: -165.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 16:48:49,676 INFO L158 Benchmark]: Witness Printer took 32.84ms. Allocated memory is still 268.4MB. Free memory was 229.6MB in the beginning and 225.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-22 16:48:49,677 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 71.3MB. Free memory was 29.1MB in the beginning and 29.0MB in the end (delta: 41.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 172.35ms. Allocated memory is still 104.9MB. Free memory was 72.1MB in the beginning and 81.0MB in the end (delta: -8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.71ms. Allocated memory is still 104.9MB. Free memory was 81.0MB in the beginning and 79.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.06ms. Allocated memory is still 104.9MB. Free memory was 79.3MB in the beginning and 78.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 310.80ms. Allocated memory is still 104.9MB. Free memory was 78.0MB in the beginning and 64.7MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 35977.37ms. Allocated memory was 104.9MB in the beginning and 268.4MB in the end (delta: 163.6MB). Free memory was 64.3MB in the beginning and 229.6MB in the end (delta: -165.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 32.84ms. Allocated memory is still 268.4MB. Free memory was 229.6MB in the beginning and 225.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 9]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 9]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 19]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 19]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 19]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 19]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 28]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 28]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 28]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 28]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 38]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 38]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 38]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 38]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 47]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 47]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 43]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 53 locations, 17 error locations. Started 1 CEGAR loops. OverallTime: 35.9s, OverallIterations: 39, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8956 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8956 mSDsluCounter, 4411 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3141 mSDsCounter, 493 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3942 IncrementalHoareTripleChecker+Invalid, 4435 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 493 mSolverCounterUnsat, 1270 mSDtfsCounter, 3942 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4419 GetRequests, 3863 SyntacticMatches, 2 SemanticMatches, 554 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 5.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=216occurred in iteration=37, InterpolantAutomatonStates: 316, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 39 MinimizatonAttempts, 409 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 21.8s InterpolantComputationTime, 6401 NumberOfCodeBlocks, 5757 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 7923 ConstructedInterpolants, 0 QuantifiedInterpolants, 82307 SizeOfPredicates, 56 NumberOfNonLiveVariables, 7653 ConjunctsInSsa, 322 ConjunctsInUnsatCore, 78 InterpolantComputations, 23 PerfectInterpolantSequences, 30154/31737 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 17 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-22 16:48:49,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE