./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b 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/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.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 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 19:41:04,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 19:41:04,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 19:41:04,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 19:41:04,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 19:41:04,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 19:41:04,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 19:41:04,384 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 19:41:04,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 19:41:04,387 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 19:41:04,388 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 19:41:04,389 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 19:41:04,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 19:41:04,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 19:41:04,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 19:41:04,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 19:41:04,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 19:41:04,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 19:41:04,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 19:41:04,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 19:41:04,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 19:41:04,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 19:41:04,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 19:41:04,411 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 19:41:04,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 19:41:04,415 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 19:41:04,415 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 19:41:04,419 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 19:41:04,421 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 19:41:04,422 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 19:41:04,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 19:41:04,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 19:41:04,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 19:41:04,426 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 19:41:04,427 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 19:41:04,427 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 19:41:04,428 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 19:41:04,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 19:41:04,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 19:41:04,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 19:41:04,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 19:41:04,431 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-14 19:41:04,467 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 19:41:04,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 19:41:04,468 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 19:41:04,468 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 19:41:04,469 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 19:41:04,470 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 19:41:04,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 19:41:04,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 19:41:04,471 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 19:41:04,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 19:41:04,472 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 19:41:04,472 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 19:41:04,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 19:41:04,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 19:41:04,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 19:41:04,472 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-14 19:41:04,473 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-14 19:41:04,473 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-14 19:41:04,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 19:41:04,473 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 19:41:04,473 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 19:41:04,473 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 19:41:04,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 19:41:04,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 19:41:04,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 19:41:04,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:41:04,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 19:41:04,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 19:41:04,474 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 19:41:04,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 19:41:04,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 19:41:04,474 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b [2021-12-14 19:41:04,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 19:41:04,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 19:41:04,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 19:41:04,689 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 19:41:04,689 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 19:41:04,690 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2021-12-14 19:41:04,750 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da80b364e/114db654705142e7bb3465eaf7dc2c5c/FLAG5ed8fafca [2021-12-14 19:41:05,069 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 19:41:05,069 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2021-12-14 19:41:05,074 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da80b364e/114db654705142e7bb3465eaf7dc2c5c/FLAG5ed8fafca [2021-12-14 19:41:05,489 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da80b364e/114db654705142e7bb3465eaf7dc2c5c [2021-12-14 19:41:05,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 19:41:05,494 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 19:41:05,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 19:41:05,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 19:41:05,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 19:41:05,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:41:05" (1/1) ... [2021-12-14 19:41:05,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d9cddce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:41:05, skipping insertion in model container [2021-12-14 19:41:05,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:41:05" (1/1) ... [2021-12-14 19:41:05,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 19:41:05,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:41:05,703 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:41:05,710 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 19:41:05,727 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:41:05,740 INFO L208 MainTranslator]: Completed translation [2021-12-14 19:41:05,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:41:05 WrapperNode [2021-12-14 19:41:05,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 19:41:05,742 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 19:41:05,742 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 19:41:05,743 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 19:41:05,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:41:05" (1/1) ... [2021-12-14 19:41:05,758 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:41:05" (1/1) ... [2021-12-14 19:41:05,776 INFO L137 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2021-12-14 19:41:05,778 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 19:41:05,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 19:41:05,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 19:41:05,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 19:41:05,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:41:05" (1/1) ... [2021-12-14 19:41:05,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:41:05" (1/1) ... [2021-12-14 19:41:05,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:41:05" (1/1) ... [2021-12-14 19:41:05,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:41:05" (1/1) ... [2021-12-14 19:41:05,805 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:41:05" (1/1) ... [2021-12-14 19:41:05,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:41:05" (1/1) ... [2021-12-14 19:41:05,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:41:05" (1/1) ... [2021-12-14 19:41:05,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 19:41:05,818 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 19:41:05,818 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 19:41:05,818 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 19:41:05,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:41:05" (1/1) ... [2021-12-14 19:41:05,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:41:05,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:05,845 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) [2021-12-14 19:41:05,879 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 [2021-12-14 19:41:05,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 19:41:05,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 19:41:05,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 19:41:05,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 19:41:05,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 19:41:05,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 19:41:05,952 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 19:41:05,954 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 19:41:06,106 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 19:41:06,111 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 19:41:06,127 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-14 19:41:06,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:41:06 BoogieIcfgContainer [2021-12-14 19:41:06,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 19:41:06,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 19:41:06,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 19:41:06,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 19:41:06,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:41:05" (1/3) ... [2021-12-14 19:41:06,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@264bf388 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:41:06, skipping insertion in model container [2021-12-14 19:41:06,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:41:05" (2/3) ... [2021-12-14 19:41:06,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@264bf388 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:41:06, skipping insertion in model container [2021-12-14 19:41:06,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:41:06" (3/3) ... [2021-12-14 19:41:06,153 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-read.c [2021-12-14 19:41:06,157 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 19:41:06,157 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-12-14 19:41:06,224 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 19:41:06,229 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 [2021-12-14 19:41:06,230 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-12-14 19:41:06,241 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 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) [2021-12-14 19:41:06,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-14 19:41:06,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:06,249 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-14 19:41:06,250 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:06,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:06,257 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2021-12-14 19:41:06,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:06,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026662711] [2021-12-14 19:41:06,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:06,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:06,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:41:06,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:06,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026662711] [2021-12-14 19:41:06,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026662711] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:41:06,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:41:06,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:41:06,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002970717] [2021-12-14 19:41:06,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:41:06,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:41:06,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:06,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:41:06,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:41:06,505 INFO L87 Difference]: Start difference. First operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 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) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:06,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:06,566 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-12-14 19:41:06,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:41:06,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-12-14 19:41:06,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:06,576 INFO L225 Difference]: With dead ends: 59 [2021-12-14 19:41:06,577 INFO L226 Difference]: Without dead ends: 55 [2021-12-14 19:41:06,580 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 [2021-12-14 19:41:06,584 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 66 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 [2021-12-14 19:41:06,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 66 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:41:06,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-14 19:41:06,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2021-12-14 19:41:06,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 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) [2021-12-14 19:41:06,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-12-14 19:41:06,620 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2021-12-14 19:41:06,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:06,621 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-12-14 19:41:06,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:06,621 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-12-14 19:41:06,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-14 19:41:06,622 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:06,622 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-14 19:41:06,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 19:41:06,623 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:06,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:06,626 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2021-12-14 19:41:06,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:06,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861961912] [2021-12-14 19:41:06,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:06,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:41:06,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:06,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861961912] [2021-12-14 19:41:06,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861961912] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:41:06,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:41:06,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:41:06,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530589300] [2021-12-14 19:41:06,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:41:06,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:41:06,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:06,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:41:06,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:41:06,697 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:06,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:06,739 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2021-12-14 19:41:06,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:41:06,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-14 19:41:06,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:06,741 INFO L225 Difference]: With dead ends: 58 [2021-12-14 19:41:06,741 INFO L226 Difference]: Without dead ends: 58 [2021-12-14 19:41:06,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:41:06,746 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:06,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:41:06,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-14 19:41:06,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2021-12-14 19:41:06,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 32 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) [2021-12-14 19:41:06,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-12-14 19:41:06,758 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2021-12-14 19:41:06,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:06,759 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-12-14 19:41:06,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:06,760 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-12-14 19:41:06,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-14 19:41:06,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:06,761 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-14 19:41:06,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 19:41:06,762 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:06,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:06,765 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2021-12-14 19:41:06,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:06,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437827177] [2021-12-14 19:41:06,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:06,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:06,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:41:06,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:06,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437827177] [2021-12-14 19:41:06,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437827177] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:41:06,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:41:06,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:41:06,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814761802] [2021-12-14 19:41:06,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:41:06,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:41:06,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:06,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:41:06,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:41:06,819 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:06,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:06,856 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-12-14 19:41:06,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:41:06,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-14 19:41:06,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:06,857 INFO L225 Difference]: With dead ends: 32 [2021-12-14 19:41:06,858 INFO L226 Difference]: Without dead ends: 32 [2021-12-14 19:41:06,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:41:06,859 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:06,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:41:06,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-14 19:41:06,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-14 19:41:06,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.44) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:06,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-12-14 19:41:06,864 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2021-12-14 19:41:06,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:06,865 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-12-14 19:41:06,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:06,865 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-12-14 19:41:06,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-14 19:41:06,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:06,866 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-14 19:41:06,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 19:41:06,867 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:06,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:06,867 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2021-12-14 19:41:06,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:06,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178973000] [2021-12-14 19:41:06,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:06,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:41:06,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:06,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178973000] [2021-12-14 19:41:06,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178973000] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:41:06,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:41:06,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:41:06,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205161907] [2021-12-14 19:41:06,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:41:06,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:41:06,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:06,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:41:06,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:41:06,935 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:07,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:07,015 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-12-14 19:41:07,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:41:07,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-14 19:41:07,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:07,018 INFO L225 Difference]: With dead ends: 55 [2021-12-14 19:41:07,018 INFO L226 Difference]: Without dead ends: 55 [2021-12-14 19:41:07,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:41:07,020 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 69 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:07,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 32 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:41:07,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-14 19:41:07,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2021-12-14 19:41:07,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 32 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) [2021-12-14 19:41:07,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-12-14 19:41:07,031 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2021-12-14 19:41:07,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:07,031 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-12-14 19:41:07,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:07,032 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-12-14 19:41:07,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-14 19:41:07,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:07,032 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:41:07,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 19:41:07,033 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:07,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:07,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2021-12-14 19:41:07,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:07,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521605457] [2021-12-14 19:41:07,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:07,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:07,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:41:07,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:07,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521605457] [2021-12-14 19:41:07,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521605457] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:41:07,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:41:07,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:41:07,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471128997] [2021-12-14 19:41:07,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:41:07,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:41:07,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:07,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:41:07,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:41:07,074 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:07,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:07,138 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-12-14 19:41:07,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:41:07,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-14 19:41:07,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:07,142 INFO L225 Difference]: With dead ends: 60 [2021-12-14 19:41:07,142 INFO L226 Difference]: Without dead ends: 60 [2021-12-14 19:41:07,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:41:07,143 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:07,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 45 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:41:07,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-14 19:41:07,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2021-12-14 19:41:07,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 33 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) [2021-12-14 19:41:07,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-12-14 19:41:07,146 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 7 [2021-12-14 19:41:07,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:07,147 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-12-14 19:41:07,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:07,147 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-12-14 19:41:07,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-14 19:41:07,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:07,147 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:41:07,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 19:41:07,148 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:07,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:07,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2021-12-14 19:41:07,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:07,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069030179] [2021-12-14 19:41:07,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:07,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:41:07,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:07,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069030179] [2021-12-14 19:41:07,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069030179] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:07,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218323634] [2021-12-14 19:41:07,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:07,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:07,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:07,211 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) [2021-12-14 19:41:07,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 19:41:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:07,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 19:41:07,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:07,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:41:07,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:07,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:41:07,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218323634] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:07,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:07,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-12-14 19:41:07,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402071303] [2021-12-14 19:41:07,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:07,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:41:07,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:07,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:41:07,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:41:07,353 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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) [2021-12-14 19:41:07,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:07,409 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2021-12-14 19:41:07,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:41:07,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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 10 [2021-12-14 19:41:07,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:07,411 INFO L225 Difference]: With dead ends: 130 [2021-12-14 19:41:07,411 INFO L226 Difference]: Without dead ends: 130 [2021-12-14 19:41:07,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:41:07,412 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 143 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:07,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 143 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:41:07,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-14 19:41:07,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 48. [2021-12-14 19:41:07,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:07,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2021-12-14 19:41:07,417 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 10 [2021-12-14 19:41:07,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:07,417 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2021-12-14 19:41:07,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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) [2021-12-14 19:41:07,418 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2021-12-14 19:41:07,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 19:41:07,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:07,418 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:41:07,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:07,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-14 19:41:07,638 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:07,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:07,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2021-12-14 19:41:07,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:07,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181338764] [2021-12-14 19:41:07,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:07,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:07,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:41:07,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:07,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181338764] [2021-12-14 19:41:07,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181338764] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:07,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798824280] [2021-12-14 19:41:07,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:07,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:07,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:07,721 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) [2021-12-14 19:41:07,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 19:41:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:07,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-14 19:41:07,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:07,810 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:41:07,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:41:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:41:07,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:41:08,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798824280] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:08,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:08,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-12-14 19:41:08,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421252861] [2021-12-14 19:41:08,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:08,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 19:41:08,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:08,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 19:41:08,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:41:08,032 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:08,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:08,233 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2021-12-14 19:41:08,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 19:41:08,234 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-14 19:41:08,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:08,235 INFO L225 Difference]: With dead ends: 129 [2021-12-14 19:41:08,235 INFO L226 Difference]: Without dead ends: 129 [2021-12-14 19:41:08,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-12-14 19:41:08,236 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 396 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:08,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 100 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:41:08,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-14 19:41:08,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 49. [2021-12-14 19:41:08,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 48 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) [2021-12-14 19:41:08,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-12-14 19:41:08,240 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 11 [2021-12-14 19:41:08,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:08,241 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-12-14 19:41:08,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:08,241 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-12-14 19:41:08,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-14 19:41:08,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:08,242 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:41:08,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:08,451 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,SelfDestructingSolverStorable6 [2021-12-14 19:41:08,452 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:08,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:08,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2021-12-14 19:41:08,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:08,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206510387] [2021-12-14 19:41:08,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:08,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:08,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:41:08,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:08,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206510387] [2021-12-14 19:41:08,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206510387] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:08,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505556318] [2021-12-14 19:41:08,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:08,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:08,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:08,498 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) [2021-12-14 19:41:08,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 19:41:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:08,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 19:41:08,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:41:08,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:08,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:41:08,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505556318] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:08,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:08,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-14 19:41:08,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825052046] [2021-12-14 19:41:08,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:08,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 19:41:08,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:08,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 19:41:08,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:41:08,644 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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) [2021-12-14 19:41:08,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:08,793 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2021-12-14 19:41:08,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 19:41:08,794 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 12 [2021-12-14 19:41:08,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:08,794 INFO L225 Difference]: With dead ends: 88 [2021-12-14 19:41:08,794 INFO L226 Difference]: Without dead ends: 88 [2021-12-14 19:41:08,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-12-14 19:41:08,795 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 127 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:08,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 62 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:41:08,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-14 19:41:08,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 48. [2021-12-14 19:41:08,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:08,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-12-14 19:41:08,799 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 12 [2021-12-14 19:41:08,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:08,800 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-12-14 19:41:08,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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) [2021-12-14 19:41:08,800 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-12-14 19:41:08,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 19:41:08,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:08,801 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:41:08,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:09,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:09,012 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:09,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:09,012 INFO L85 PathProgramCache]: Analyzing trace with hash 4840471, now seen corresponding path program 2 times [2021-12-14 19:41:09,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:09,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290808404] [2021-12-14 19:41:09,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:09,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:09,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 19:41:09,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:09,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290808404] [2021-12-14 19:41:09,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290808404] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:41:09,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:41:09,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:41:09,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312004228] [2021-12-14 19:41:09,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:41:09,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:41:09,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:09,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:41:09,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:41:09,112 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:09,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:09,129 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-12-14 19:41:09,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:41:09,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-14 19:41:09,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:09,130 INFO L225 Difference]: With dead ends: 46 [2021-12-14 19:41:09,130 INFO L226 Difference]: Without dead ends: 46 [2021-12-14 19:41:09,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:41:09,133 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:09,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:41:09,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-14 19:41:09,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-14 19:41:09,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:09,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-12-14 19:41:09,143 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 17 [2021-12-14 19:41:09,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:09,144 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-12-14 19:41:09,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:09,144 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-12-14 19:41:09,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 19:41:09,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:09,145 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:41:09,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 19:41:09,146 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:09,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:09,146 INFO L85 PathProgramCache]: Analyzing trace with hash 4840472, now seen corresponding path program 1 times [2021-12-14 19:41:09,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:09,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988094697] [2021-12-14 19:41:09,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:09,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:09,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:09,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 19:41:09,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:09,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988094697] [2021-12-14 19:41:09,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988094697] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:41:09,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:41:09,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:41:09,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61948348] [2021-12-14 19:41:09,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:41:09,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:41:09,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:09,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:41:09,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:41:09,216 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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) [2021-12-14 19:41:09,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:09,239 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2021-12-14 19:41:09,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:41:09,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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 17 [2021-12-14 19:41:09,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:09,241 INFO L225 Difference]: With dead ends: 76 [2021-12-14 19:41:09,241 INFO L226 Difference]: Without dead ends: 76 [2021-12-14 19:41:09,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:41:09,242 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:09,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 35 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:41:09,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-14 19:41:09,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2021-12-14 19:41:09,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 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) [2021-12-14 19:41:09,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2021-12-14 19:41:09,246 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 17 [2021-12-14 19:41:09,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:09,246 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2021-12-14 19:41:09,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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) [2021-12-14 19:41:09,247 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2021-12-14 19:41:09,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-14 19:41:09,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:09,247 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:41:09,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 19:41:09,248 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:09,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:09,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1949815299, now seen corresponding path program 1 times [2021-12-14 19:41:09,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:09,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765521216] [2021-12-14 19:41:09,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:09,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 19:41:09,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:09,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765521216] [2021-12-14 19:41:09,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765521216] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:09,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036416185] [2021-12-14 19:41:09,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:09,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:09,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:09,312 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) [2021-12-14 19:41:09,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 19:41:09,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:09,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 19:41:09,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 19:41:09,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:09,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-12-14 19:41:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 19:41:09,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036416185] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:09,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:09,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-14 19:41:09,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097763364] [2021-12-14 19:41:09,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:09,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 19:41:09,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:09,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 19:41:09,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:41:09,625 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 9 states, 8 states have (on average 4.75) 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) [2021-12-14 19:41:09,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:09,705 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2021-12-14 19:41:09,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:41:09,706 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) 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 23 [2021-12-14 19:41:09,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:09,706 INFO L225 Difference]: With dead ends: 80 [2021-12-14 19:41:09,707 INFO L226 Difference]: Without dead ends: 80 [2021-12-14 19:41:09,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-14 19:41:09,707 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 82 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:09,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 40 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:41:09,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-14 19:41:09,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2021-12-14 19:41:09,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 72 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:09,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2021-12-14 19:41:09,711 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 23 [2021-12-14 19:41:09,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:09,711 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2021-12-14 19:41:09,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) 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) [2021-12-14 19:41:09,712 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2021-12-14 19:41:09,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-14 19:41:09,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:09,713 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2021-12-14 19:41:09,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:09,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:09,931 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:09,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:09,932 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2021-12-14 19:41:09,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:09,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026491139] [2021-12-14 19:41:09,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:09,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 19:41:09,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:09,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026491139] [2021-12-14 19:41:09,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026491139] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:41:09,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:41:09,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 19:41:09,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463784405] [2021-12-14 19:41:09,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:41:09,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 19:41:09,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:09,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 19:41:09,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:41:09,992 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 7 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) [2021-12-14 19:41:10,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:10,069 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2021-12-14 19:41:10,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:41:10,070 INFO L78 Accepts]: Start accepts. Automaton has has 7 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 25 [2021-12-14 19:41:10,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:10,071 INFO L225 Difference]: With dead ends: 86 [2021-12-14 19:41:10,071 INFO L226 Difference]: Without dead ends: 86 [2021-12-14 19:41:10,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:41:10,072 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:10,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 65 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:41:10,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-14 19:41:10,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2021-12-14 19:41:10,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 60 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) [2021-12-14 19:41:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2021-12-14 19:41:10,075 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 25 [2021-12-14 19:41:10,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:10,075 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2021-12-14 19:41:10,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 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) [2021-12-14 19:41:10,076 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2021-12-14 19:41:10,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-14 19:41:10,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:10,077 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:41:10,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 19:41:10,078 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:10,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:10,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1809865305, now seen corresponding path program 1 times [2021-12-14 19:41:10,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:10,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858601435] [2021-12-14 19:41:10,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:10,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:10,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 19:41:10,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:10,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858601435] [2021-12-14 19:41:10,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858601435] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:10,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293517662] [2021-12-14 19:41:10,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:10,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:10,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:10,130 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) [2021-12-14 19:41:10,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 19:41:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:10,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 19:41:10,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 19:41:10,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:41:10,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293517662] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:41:10,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 19:41:10,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-14 19:41:10,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487027384] [2021-12-14 19:41:10,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:41:10,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:41:10,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:10,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:41:10,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:41:10,490 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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) [2021-12-14 19:41:10,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:10,491 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-12-14 19:41:10,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:41:10,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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 26 [2021-12-14 19:41:10,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:10,493 INFO L225 Difference]: With dead ends: 62 [2021-12-14 19:41:10,493 INFO L226 Difference]: Without dead ends: 60 [2021-12-14 19:41:10,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:41:10,494 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:10,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 39 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-12-14 19:41:10,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-14 19:41:10,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-14 19:41:10,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:10,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-12-14 19:41:10,497 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 26 [2021-12-14 19:41:10,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:10,497 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-12-14 19:41:10,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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) [2021-12-14 19:41:10,497 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-12-14 19:41:10,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-14 19:41:10,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:10,498 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:41:10,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:10,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-14 19:41:10,721 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:10,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:10,722 INFO L85 PathProgramCache]: Analyzing trace with hash -271127104, now seen corresponding path program 1 times [2021-12-14 19:41:10,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:10,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510240048] [2021-12-14 19:41:10,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:10,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 19:41:10,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:10,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510240048] [2021-12-14 19:41:10,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510240048] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:10,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43193992] [2021-12-14 19:41:10,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:10,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:10,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:10,770 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) [2021-12-14 19:41:10,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 19:41:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:10,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 19:41:10,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:10,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:41:11,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:41:11,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:41:11,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2021-12-14 19:41:11,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:41:11,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:11,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-12-14 19:41:11,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-12-14 19:41:11,265 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:41:11,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43193992] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:11,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:11,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 11, 11] total 21 [2021-12-14 19:41:11,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065262336] [2021-12-14 19:41:11,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:11,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-14 19:41:11,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:11,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-14 19:41:11,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-12-14 19:41:11,267 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 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) [2021-12-14 19:41:11,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:11,531 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2021-12-14 19:41:11,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 19:41:11,532 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 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 27 [2021-12-14 19:41:11,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:11,532 INFO L225 Difference]: With dead ends: 101 [2021-12-14 19:41:11,532 INFO L226 Difference]: Without dead ends: 101 [2021-12-14 19:41:11,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2021-12-14 19:41:11,533 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:11,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 145 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:41:11,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-14 19:41:11,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 66. [2021-12-14 19:41:11,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:11,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-12-14 19:41:11,536 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 27 [2021-12-14 19:41:11,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:11,536 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-12-14 19:41:11,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 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) [2021-12-14 19:41:11,536 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-12-14 19:41:11,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-14 19:41:11,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:11,537 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-14 19:41:11,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:11,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:11,744 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:11,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:11,744 INFO L85 PathProgramCache]: Analyzing trace with hash 164722723, now seen corresponding path program 1 times [2021-12-14 19:41:11,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:11,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458171113] [2021-12-14 19:41:11,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:11,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 19:41:11,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:11,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458171113] [2021-12-14 19:41:11,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458171113] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:11,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079225216] [2021-12-14 19:41:11,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:11,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:11,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:11,815 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) [2021-12-14 19:41:11,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 19:41:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:11,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 19:41:11,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 19:41:11,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:12,062 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 19:41:12,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079225216] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:12,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:12,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2021-12-14 19:41:12,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758703123] [2021-12-14 19:41:12,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:12,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 19:41:12,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:12,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 19:41:12,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-12-14 19:41:12,065 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:12,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:12,226 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2021-12-14 19:41:12,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 19:41:12,226 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 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 34 [2021-12-14 19:41:12,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:12,226 INFO L225 Difference]: With dead ends: 66 [2021-12-14 19:41:12,227 INFO L226 Difference]: Without dead ends: 66 [2021-12-14 19:41:12,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-12-14 19:41:12,227 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:12,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 60 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:41:12,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-14 19:41:12,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-12-14 19:41:12,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 65 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) [2021-12-14 19:41:12,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2021-12-14 19:41:12,229 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 34 [2021-12-14 19:41:12,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:12,230 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2021-12-14 19:41:12,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:12,230 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2021-12-14 19:41:12,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 19:41:12,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:12,231 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-14 19:41:12,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:12,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:12,444 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:12,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:12,444 INFO L85 PathProgramCache]: Analyzing trace with hash 882673172, now seen corresponding path program 2 times [2021-12-14 19:41:12,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:12,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601861379] [2021-12-14 19:41:12,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:12,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-14 19:41:12,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:12,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601861379] [2021-12-14 19:41:12,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601861379] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:12,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881186757] [2021-12-14 19:41:12,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:41:12,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:12,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:12,522 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) [2021-12-14 19:41:12,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 19:41:12,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:41:12,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:12,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-14 19:41:12,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:12,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:41:12,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-14 19:41:12,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-14 19:41:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-14 19:41:12,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:13,026 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-14 19:41:13,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881186757] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:13,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:13,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2021-12-14 19:41:13,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014501923] [2021-12-14 19:41:13,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:13,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 19:41:13,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:13,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 19:41:13,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:41:13,029 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 9 states, 8 states have (on average 8.75) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:13,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:13,104 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2021-12-14 19:41:13,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:41:13,104 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.75) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 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 39 [2021-12-14 19:41:13,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:13,105 INFO L225 Difference]: With dead ends: 158 [2021-12-14 19:41:13,105 INFO L226 Difference]: Without dead ends: 158 [2021-12-14 19:41:13,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-12-14 19:41:13,106 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 43 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:13,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 75 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:41:13,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-14 19:41:13,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2021-12-14 19:41:13,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.1517241379310346) internal successors, (167), 149 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:13,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 167 transitions. [2021-12-14 19:41:13,110 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 167 transitions. Word has length 39 [2021-12-14 19:41:13,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:13,111 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 167 transitions. [2021-12-14 19:41:13,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.75) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:13,111 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 167 transitions. [2021-12-14 19:41:13,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-14 19:41:13,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:13,112 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:41:13,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:13,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-14 19:41:13,328 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:13,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:13,328 INFO L85 PathProgramCache]: Analyzing trace with hash -890031373, now seen corresponding path program 1 times [2021-12-14 19:41:13,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:13,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787073205] [2021-12-14 19:41:13,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:13,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:13,389 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 19 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 19:41:13,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:13,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787073205] [2021-12-14 19:41:13,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787073205] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:13,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403139788] [2021-12-14 19:41:13,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:13,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:13,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:13,391 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) [2021-12-14 19:41:13,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 19:41:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:13,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 19:41:13,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 19:41:13,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 19:41:13,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403139788] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:13,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:13,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2021-12-14 19:41:13,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232400505] [2021-12-14 19:41:13,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:13,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 19:41:13,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:13,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 19:41:13,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-12-14 19:41:13,715 INFO L87 Difference]: Start difference. First operand 150 states and 167 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:13,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:13,927 INFO L93 Difference]: Finished difference Result 165 states and 178 transitions. [2021-12-14 19:41:13,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 19:41:13,928 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 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 [2021-12-14 19:41:13,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:13,930 INFO L225 Difference]: With dead ends: 165 [2021-12-14 19:41:13,930 INFO L226 Difference]: Without dead ends: 165 [2021-12-14 19:41:13,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-12-14 19:41:13,931 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 176 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:13,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 80 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:41:13,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-14 19:41:13,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 143. [2021-12-14 19:41:13,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.1304347826086956) internal successors, (156), 142 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:13,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 156 transitions. [2021-12-14 19:41:13,935 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 156 transitions. Word has length 42 [2021-12-14 19:41:13,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:13,936 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 156 transitions. [2021-12-14 19:41:13,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:13,937 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 156 transitions. [2021-12-14 19:41:13,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-14 19:41:13,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:13,938 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:41:13,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:14,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-14 19:41:14,164 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:14,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:14,165 INFO L85 PathProgramCache]: Analyzing trace with hash -255177540, now seen corresponding path program 2 times [2021-12-14 19:41:14,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:14,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297288699] [2021-12-14 19:41:14,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:14,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-14 19:41:14,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:14,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297288699] [2021-12-14 19:41:14,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297288699] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:14,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24885109] [2021-12-14 19:41:14,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:41:14,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:14,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:14,218 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) [2021-12-14 19:41:14,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 19:41:14,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:41:14,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:14,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 19:41:14,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-14 19:41:14,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:14,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-12-14 19:41:14,881 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-14 19:41:14,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24885109] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:14,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:14,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2021-12-14 19:41:14,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267344022] [2021-12-14 19:41:14,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:14,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 19:41:14,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:14,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 19:41:14,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-12-14 19:41:14,885 INFO L87 Difference]: Start difference. First operand 143 states and 156 transitions. Second operand has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 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) [2021-12-14 19:41:15,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:15,046 INFO L93 Difference]: Finished difference Result 153 states and 163 transitions. [2021-12-14 19:41:15,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 19:41:15,047 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 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 49 [2021-12-14 19:41:15,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:15,048 INFO L225 Difference]: With dead ends: 153 [2021-12-14 19:41:15,048 INFO L226 Difference]: Without dead ends: 153 [2021-12-14 19:41:15,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-12-14 19:41:15,049 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 183 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:15,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 108 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:41:15,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-14 19:41:15,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2021-12-14 19:41:15,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.119718309859155) internal successors, (159), 146 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) [2021-12-14 19:41:15,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 159 transitions. [2021-12-14 19:41:15,052 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 159 transitions. Word has length 49 [2021-12-14 19:41:15,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:15,053 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 159 transitions. [2021-12-14 19:41:15,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 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) [2021-12-14 19:41:15,053 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 159 transitions. [2021-12-14 19:41:15,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 19:41:15,053 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:15,053 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-12-14 19:41:15,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:15,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-14 19:41:15,254 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:15,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:15,255 INFO L85 PathProgramCache]: Analyzing trace with hash 11435127, now seen corresponding path program 2 times [2021-12-14 19:41:15,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:15,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691796384] [2021-12-14 19:41:15,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:15,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 27 proven. 175 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-14 19:41:15,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:15,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691796384] [2021-12-14 19:41:15,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691796384] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:15,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573509169] [2021-12-14 19:41:15,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:41:15,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:15,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:15,368 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) [2021-12-14 19:41:15,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 19:41:15,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:41:15,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:15,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-14 19:41:15,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-14 19:41:15,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-14 19:41:15,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573509169] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:15,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:15,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2021-12-14 19:41:15,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793412807] [2021-12-14 19:41:15,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:15,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 19:41:15,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:15,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 19:41:15,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-12-14 19:41:15,811 INFO L87 Difference]: Start difference. First operand 147 states and 159 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:16,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:16,179 INFO L93 Difference]: Finished difference Result 199 states and 209 transitions. [2021-12-14 19:41:16,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-14 19:41:16,179 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-14 19:41:16,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:16,180 INFO L225 Difference]: With dead ends: 199 [2021-12-14 19:41:16,180 INFO L226 Difference]: Without dead ends: 199 [2021-12-14 19:41:16,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=401, Invalid=1005, Unknown=0, NotChecked=0, Total=1406 [2021-12-14 19:41:16,181 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 282 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:16,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 105 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:41:16,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-12-14 19:41:16,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 145. [2021-12-14 19:41:16,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.1) internal successors, (154), 144 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:16,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 154 transitions. [2021-12-14 19:41:16,185 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 154 transitions. Word has length 64 [2021-12-14 19:41:16,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:16,185 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 154 transitions. [2021-12-14 19:41:16,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:16,186 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 154 transitions. [2021-12-14 19:41:16,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-14 19:41:16,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:16,187 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2021-12-14 19:41:16,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:16,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:16,409 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:16,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:16,410 INFO L85 PathProgramCache]: Analyzing trace with hash -867962629, now seen corresponding path program 3 times [2021-12-14 19:41:16,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:16,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809307186] [2021-12-14 19:41:16,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:16,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:16,500 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 149 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-14 19:41:16,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:16,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809307186] [2021-12-14 19:41:16,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809307186] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:16,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508127708] [2021-12-14 19:41:16,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 19:41:16,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:16,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:16,503 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) [2021-12-14 19:41:16,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 19:41:16,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-14 19:41:16,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:16,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-14 19:41:16,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:16,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:41:16,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-14 19:41:16,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-14 19:41:17,022 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-14 19:41:17,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:41:17,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508127708] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:41:17,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 19:41:17,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2021-12-14 19:41:17,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645922861] [2021-12-14 19:41:17,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:41:17,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:41:17,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:17,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:41:17,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:41:17,025 INFO L87 Difference]: Start difference. First operand 145 states and 154 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:17,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:17,059 INFO L93 Difference]: Finished difference Result 143 states and 152 transitions. [2021-12-14 19:41:17,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:41:17,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 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 75 [2021-12-14 19:41:17,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:17,060 INFO L225 Difference]: With dead ends: 143 [2021-12-14 19:41:17,060 INFO L226 Difference]: Without dead ends: 143 [2021-12-14 19:41:17,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:41:17,061 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 46 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 35 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 [2021-12-14 19:41:17,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 35 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:41:17,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-14 19:41:17,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2021-12-14 19:41:17,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 108 states have (on average 1.0648148148148149) internal successors, (115), 110 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:17,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2021-12-14 19:41:17,064 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 75 [2021-12-14 19:41:17,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:17,064 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2021-12-14 19:41:17,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:17,065 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2021-12-14 19:41:17,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-14 19:41:17,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:17,065 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:41:17,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:17,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:17,271 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:17,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:17,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1660735401, now seen corresponding path program 1 times [2021-12-14 19:41:17,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:17,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730961414] [2021-12-14 19:41:17,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:17,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:17,348 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 14 proven. 149 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 19:41:17,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:17,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730961414] [2021-12-14 19:41:17,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730961414] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:17,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623384624] [2021-12-14 19:41:17,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:17,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:17,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:17,352 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) [2021-12-14 19:41:17,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-14 19:41:17,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:17,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 19:41:17,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 57 proven. 106 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 19:41:17,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 57 proven. 106 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 19:41:17,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623384624] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:17,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:17,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2021-12-14 19:41:17,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365412657] [2021-12-14 19:41:17,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:17,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 19:41:17,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:17,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 19:41:17,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-12-14 19:41:17,799 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 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) [2021-12-14 19:41:18,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:18,000 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2021-12-14 19:41:18,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 19:41:18,001 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 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 80 [2021-12-14 19:41:18,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:18,002 INFO L225 Difference]: With dead ends: 113 [2021-12-14 19:41:18,002 INFO L226 Difference]: Without dead ends: 113 [2021-12-14 19:41:18,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-12-14 19:41:18,003 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 97 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:18,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 58 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:41:18,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-14 19:41:18,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-12-14 19:41:18,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 108 states have (on average 1.0462962962962963) internal successors, (113), 110 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:18,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2021-12-14 19:41:18,006 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 80 [2021-12-14 19:41:18,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:18,006 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2021-12-14 19:41:18,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 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) [2021-12-14 19:41:18,007 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2021-12-14 19:41:18,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-14 19:41:18,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:18,007 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:41:18,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:18,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-14 19:41:18,231 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:18,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:18,231 INFO L85 PathProgramCache]: Analyzing trace with hash 283151040, now seen corresponding path program 2 times [2021-12-14 19:41:18,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:18,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011453103] [2021-12-14 19:41:18,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:18,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:18,331 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-14 19:41:18,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:18,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011453103] [2021-12-14 19:41:18,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011453103] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:18,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865667057] [2021-12-14 19:41:18,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:41:18,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:18,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:18,335 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) [2021-12-14 19:41:18,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-14 19:41:18,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-14 19:41:18,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:18,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 19:41:18,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-12-14 19:41:19,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:41:19,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865667057] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:41:19,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 19:41:19,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-14 19:41:19,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316457490] [2021-12-14 19:41:19,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:41:19,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:41:19,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:19,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:41:19,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-14 19:41:19,027 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:19,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:19,029 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2021-12-14 19:41:19,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:41:19,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 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 85 [2021-12-14 19:41:19,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:19,030 INFO L225 Difference]: With dead ends: 110 [2021-12-14 19:41:19,030 INFO L226 Difference]: Without dead ends: 94 [2021-12-14 19:41:19,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-14 19:41:19,031 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:19,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 36 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2021-12-14 19:41:19,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-14 19:41:19,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-12-14 19:41:19,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 93 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:19,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2021-12-14 19:41:19,034 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 85 [2021-12-14 19:41:19,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:19,035 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2021-12-14 19:41:19,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:19,035 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2021-12-14 19:41:19,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 19:41:19,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:19,036 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2021-12-14 19:41:19,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:19,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:19,259 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:19,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:19,259 INFO L85 PathProgramCache]: Analyzing trace with hash -875547996, now seen corresponding path program 3 times [2021-12-14 19:41:19,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:19,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809301661] [2021-12-14 19:41:19,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:19,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-14 19:41:19,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:19,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809301661] [2021-12-14 19:41:19,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809301661] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:19,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405776116] [2021-12-14 19:41:19,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 19:41:19,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:19,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:19,344 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) [2021-12-14 19:41:19,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-14 19:41:19,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-14 19:41:19,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:19,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-14 19:41:19,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:19,429 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:41:19,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:41:19,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-14 19:41:19,836 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 3 proven. 227 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-12-14 19:41:19,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 230 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-12-14 19:41:20,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405776116] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:20,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:20,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2021-12-14 19:41:20,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572943372] [2021-12-14 19:41:20,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:20,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 19:41:20,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:20,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 19:41:20,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-12-14 19:41:20,073 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 17 states, 16 states have (on average 5.4375) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:20,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:20,310 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2021-12-14 19:41:20,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 19:41:20,310 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.4375) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 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 [2021-12-14 19:41:20,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:20,311 INFO L225 Difference]: With dead ends: 117 [2021-12-14 19:41:20,311 INFO L226 Difference]: Without dead ends: 117 [2021-12-14 19:41:20,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-12-14 19:41:20,312 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 228 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:20,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 61 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:41:20,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-14 19:41:20,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 93. [2021-12-14 19:41:20,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:20,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-12-14 19:41:20,315 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 91 [2021-12-14 19:41:20,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:20,315 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-12-14 19:41:20,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.4375) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:20,315 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-12-14 19:41:20,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-14 19:41:20,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:20,316 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2021-12-14 19:41:20,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:20,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:20,528 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:20,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:20,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1372184046, now seen corresponding path program 1 times [2021-12-14 19:41:20,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:20,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782334424] [2021-12-14 19:41:20,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:20,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:20,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-14 19:41:20,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:20,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782334424] [2021-12-14 19:41:20,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782334424] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:20,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326654693] [2021-12-14 19:41:20,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:20,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:20,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:20,694 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) [2021-12-14 19:41:20,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-14 19:41:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:20,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-14 19:41:20,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:20,807 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:41:20,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:41:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-14 19:41:21,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-14 19:41:21,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326654693] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:21,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:21,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2021-12-14 19:41:21,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307992537] [2021-12-14 19:41:21,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:21,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-14 19:41:21,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:21,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-14 19:41:21,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-12-14 19:41:21,668 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:22,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:22,058 INFO L93 Difference]: Finished difference Result 159 states and 166 transitions. [2021-12-14 19:41:22,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 19:41:22,059 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-14 19:41:22,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:22,059 INFO L225 Difference]: With dead ends: 159 [2021-12-14 19:41:22,059 INFO L226 Difference]: Without dead ends: 159 [2021-12-14 19:41:22,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-12-14 19:41:22,061 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 172 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:22,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 99 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:41:22,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-14 19:41:22,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 123. [2021-12-14 19:41:22,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0655737704918034) internal successors, (130), 122 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:22,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2021-12-14 19:41:22,065 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 92 [2021-12-14 19:41:22,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:22,066 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2021-12-14 19:41:22,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:22,066 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2021-12-14 19:41:22,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-14 19:41:22,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:22,068 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2021-12-14 19:41:22,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:22,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-14 19:41:22,276 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:22,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:22,276 INFO L85 PathProgramCache]: Analyzing trace with hash -285868558, now seen corresponding path program 2 times [2021-12-14 19:41:22,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:22,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524806233] [2021-12-14 19:41:22,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:22,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 84 proven. 793 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-12-14 19:41:22,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:22,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524806233] [2021-12-14 19:41:22,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524806233] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:22,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478161568] [2021-12-14 19:41:22,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:41:22,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:22,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:22,403 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) [2021-12-14 19:41:22,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-14 19:41:22,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:41:22,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:22,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 19:41:22,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:23,263 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 42 proven. 830 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-14 19:41:23,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:23,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-12-14 19:41:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 42 proven. 830 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-14 19:41:24,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478161568] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:24,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:24,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2021-12-14 19:41:24,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080746000] [2021-12-14 19:41:24,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:24,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-14 19:41:24,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:24,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-14 19:41:24,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 19:41:24,571 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand has 37 states, 37 states have (on average 5.648648648648648) internal successors, (209), 37 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:25,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:25,894 INFO L93 Difference]: Finished difference Result 167 states and 175 transitions. [2021-12-14 19:41:25,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-14 19:41:25,895 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.648648648648648) internal successors, (209), 37 states have internal predecessors, (209), 0 states have call successors, (0), 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 122 [2021-12-14 19:41:25,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:25,896 INFO L225 Difference]: With dead ends: 167 [2021-12-14 19:41:25,896 INFO L226 Difference]: Without dead ends: 167 [2021-12-14 19:41:25,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1268, Invalid=4432, Unknown=0, NotChecked=0, Total=5700 [2021-12-14 19:41:25,898 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 183 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:25,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 123 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:41:25,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-14 19:41:25,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 155. [2021-12-14 19:41:25,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0584415584415585) internal successors, (163), 154 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:25,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 163 transitions. [2021-12-14 19:41:25,909 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 163 transitions. Word has length 122 [2021-12-14 19:41:25,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:25,910 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 163 transitions. [2021-12-14 19:41:25,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.648648648648648) internal successors, (209), 37 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:25,910 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 163 transitions. [2021-12-14 19:41:25,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-14 19:41:25,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:25,911 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2021-12-14 19:41:25,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:26,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:26,123 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:26,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:26,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1906495009, now seen corresponding path program 3 times [2021-12-14 19:41:26,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:26,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475827833] [2021-12-14 19:41:26,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:26,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:26,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 828 proven. 334 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-12-14 19:41:26,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:26,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475827833] [2021-12-14 19:41:26,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475827833] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:26,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411529161] [2021-12-14 19:41:26,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 19:41:26,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:26,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:26,246 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) [2021-12-14 19:41:26,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-14 19:41:26,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-14 19:41:26,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:26,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 19:41:26,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 936 proven. 249 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-12-14 19:41:26,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:27,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 807 proven. 378 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-12-14 19:41:27,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411529161] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:27,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:27,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 36 [2021-12-14 19:41:27,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555526983] [2021-12-14 19:41:27,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:27,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-14 19:41:27,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:27,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-14 19:41:27,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2021-12-14 19:41:27,240 INFO L87 Difference]: Start difference. First operand 155 states and 163 transitions. Second operand has 36 states, 36 states have (on average 5.277777777777778) internal successors, (190), 36 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:28,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:28,066 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2021-12-14 19:41:28,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-14 19:41:28,067 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.277777777777778) internal successors, (190), 36 states have internal predecessors, (190), 0 states have call successors, (0), 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 [2021-12-14 19:41:28,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:28,067 INFO L225 Difference]: With dead ends: 161 [2021-12-14 19:41:28,067 INFO L226 Difference]: Without dead ends: 161 [2021-12-14 19:41:28,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=846, Invalid=3444, Unknown=0, NotChecked=0, Total=4290 [2021-12-14 19:41:28,069 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 472 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:28,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 77 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:41:28,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-14 19:41:28,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 155. [2021-12-14 19:41:28,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0454545454545454) internal successors, (161), 154 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:28,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 161 transitions. [2021-12-14 19:41:28,071 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 161 transitions. Word has length 149 [2021-12-14 19:41:28,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:28,072 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 161 transitions. [2021-12-14 19:41:28,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.277777777777778) internal successors, (190), 36 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:28,072 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 161 transitions. [2021-12-14 19:41:28,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-14 19:41:28,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:28,073 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2021-12-14 19:41:28,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-14 19:41:28,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:28,291 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:28,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:28,292 INFO L85 PathProgramCache]: Analyzing trace with hash -874087090, now seen corresponding path program 4 times [2021-12-14 19:41:28,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:28,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337421660] [2021-12-14 19:41:28,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:28,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 118 proven. 1328 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-12-14 19:41:28,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:28,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337421660] [2021-12-14 19:41:28,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337421660] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:28,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716538956] [2021-12-14 19:41:28,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 19:41:28,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:28,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:28,469 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) [2021-12-14 19:41:28,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-14 19:41:28,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 19:41:28,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:28,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-14 19:41:28,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 283 proven. 1201 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-12-14 19:41:29,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:29,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 283 proven. 1201 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-12-14 19:41:29,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716538956] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:29,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:29,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 35 [2021-12-14 19:41:29,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997484669] [2021-12-14 19:41:29,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:29,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-14 19:41:29,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:29,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-14 19:41:29,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=857, Unknown=0, NotChecked=0, Total=1190 [2021-12-14 19:41:29,468 INFO L87 Difference]: Start difference. First operand 155 states and 161 transitions. Second operand has 35 states, 35 states have (on average 6.428571428571429) internal successors, (225), 35 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:30,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:30,757 INFO L93 Difference]: Finished difference Result 401 states and 422 transitions. [2021-12-14 19:41:30,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-14 19:41:30,758 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.428571428571429) internal successors, (225), 35 states have internal predecessors, (225), 0 states have call successors, (0), 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 154 [2021-12-14 19:41:30,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:30,760 INFO L225 Difference]: With dead ends: 401 [2021-12-14 19:41:30,760 INFO L226 Difference]: Without dead ends: 401 [2021-12-14 19:41:30,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4337 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3118, Invalid=7594, Unknown=0, NotChecked=0, Total=10712 [2021-12-14 19:41:30,763 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 302 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:30,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 90 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 19:41:30,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-12-14 19:41:30,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 390. [2021-12-14 19:41:30,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.056555269922879) internal successors, (411), 389 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:30,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 411 transitions. [2021-12-14 19:41:30,772 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 411 transitions. Word has length 154 [2021-12-14 19:41:30,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:30,773 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 411 transitions. [2021-12-14 19:41:30,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.428571428571429) internal successors, (225), 35 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:30,773 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 411 transitions. [2021-12-14 19:41:30,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-12-14 19:41:30,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:30,776 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 49, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2021-12-14 19:41:30,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:30,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:30,994 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:30,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:30,994 INFO L85 PathProgramCache]: Analyzing trace with hash 747006490, now seen corresponding path program 5 times [2021-12-14 19:41:30,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:30,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150202083] [2021-12-14 19:41:30,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:30,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:31,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6738 backedges. 3868 proven. 228 refuted. 0 times theorem prover too weak. 2642 trivial. 0 not checked. [2021-12-14 19:41:31,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:31,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150202083] [2021-12-14 19:41:31,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150202083] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:31,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689357812] [2021-12-14 19:41:31,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 19:41:31,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:31,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:31,221 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) [2021-12-14 19:41:31,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-14 19:41:31,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-14 19:41:31,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:31,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 19:41:31,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6738 backedges. 3685 proven. 501 refuted. 0 times theorem prover too weak. 2552 trivial. 0 not checked. [2021-12-14 19:41:32,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6738 backedges. 3798 proven. 388 refuted. 0 times theorem prover too weak. 2552 trivial. 0 not checked. [2021-12-14 19:41:32,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689357812] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:32,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:32,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 32 [2021-12-14 19:41:32,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343017852] [2021-12-14 19:41:32,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:32,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-14 19:41:32,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:32,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-14 19:41:32,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-12-14 19:41:32,515 INFO L87 Difference]: Start difference. First operand 390 states and 411 transitions. Second operand has 32 states, 32 states have (on average 5.21875) internal successors, (167), 32 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:33,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:33,181 INFO L93 Difference]: Finished difference Result 390 states and 405 transitions. [2021-12-14 19:41:33,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-14 19:41:33,182 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.21875) internal successors, (167), 32 states have internal predecessors, (167), 0 states have call successors, (0), 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 314 [2021-12-14 19:41:33,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:33,183 INFO L225 Difference]: With dead ends: 390 [2021-12-14 19:41:33,183 INFO L226 Difference]: Without dead ends: 390 [2021-12-14 19:41:33,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 612 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=700, Invalid=2380, Unknown=0, NotChecked=0, Total=3080 [2021-12-14 19:41:33,184 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 128 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:33,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 80 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:41:33,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-12-14 19:41:33,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2021-12-14 19:41:33,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0411311053984575) internal successors, (405), 389 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:33,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 405 transitions. [2021-12-14 19:41:33,191 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 405 transitions. Word has length 314 [2021-12-14 19:41:33,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:33,192 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 405 transitions. [2021-12-14 19:41:33,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.21875) internal successors, (167), 32 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:33,192 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 405 transitions. [2021-12-14 19:41:33,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-12-14 19:41:33,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:33,196 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 54, 54, 54, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2021-12-14 19:41:33,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:33,423 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,SelfDestructingSolverStorable27 [2021-12-14 19:41:33,423 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:33,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:33,424 INFO L85 PathProgramCache]: Analyzing trace with hash -525875421, now seen corresponding path program 6 times [2021-12-14 19:41:33,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:33,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781770789] [2021-12-14 19:41:33,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:33,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8073 backedges. 4639 proven. 321 refuted. 0 times theorem prover too weak. 3113 trivial. 0 not checked. [2021-12-14 19:41:33,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:33,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781770789] [2021-12-14 19:41:33,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781770789] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:33,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935555517] [2021-12-14 19:41:33,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 19:41:33,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:33,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:33,702 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) [2021-12-14 19:41:33,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-14 19:41:34,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-12-14 19:41:34,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:34,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 19:41:34,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8073 backedges. 4943 proven. 852 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2021-12-14 19:41:34,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:35,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8073 backedges. 5125 proven. 670 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2021-12-14 19:41:35,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935555517] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:35,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:35,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 36 [2021-12-14 19:41:35,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504278324] [2021-12-14 19:41:35,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:35,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-14 19:41:35,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:35,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-14 19:41:35,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2021-12-14 19:41:35,511 INFO L87 Difference]: Start difference. First operand 390 states and 405 transitions. Second operand has 36 states, 36 states have (on average 5.388888888888889) internal successors, (194), 36 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:36,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:36,544 INFO L93 Difference]: Finished difference Result 390 states and 400 transitions. [2021-12-14 19:41:36,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-14 19:41:36,544 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.388888888888889) internal successors, (194), 36 states have internal predecessors, (194), 0 states have call successors, (0), 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 339 [2021-12-14 19:41:36,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:36,546 INFO L225 Difference]: With dead ends: 390 [2021-12-14 19:41:36,546 INFO L226 Difference]: Without dead ends: 390 [2021-12-14 19:41:36,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 660 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=997, Invalid=3559, Unknown=0, NotChecked=0, Total=4556 [2021-12-14 19:41:36,547 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 140 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:36,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 127 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 19:41:36,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-12-14 19:41:36,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2021-12-14 19:41:36,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0282776349614395) internal successors, (400), 389 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:36,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 400 transitions. [2021-12-14 19:41:36,553 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 400 transitions. Word has length 339 [2021-12-14 19:41:36,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:36,553 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 400 transitions. [2021-12-14 19:41:36,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.388888888888889) internal successors, (194), 36 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:36,554 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 400 transitions. [2021-12-14 19:41:36,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-12-14 19:41:36,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:36,564 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 58, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2021-12-14 19:41:36,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:36,783 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,SelfDestructingSolverStorable28 [2021-12-14 19:41:36,783 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:36,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:36,784 INFO L85 PathProgramCache]: Analyzing trace with hash -814421421, now seen corresponding path program 7 times [2021-12-14 19:41:36,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:36,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619942815] [2021-12-14 19:41:36,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:36,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9231 backedges. 5350 proven. 429 refuted. 0 times theorem prover too weak. 3452 trivial. 0 not checked. [2021-12-14 19:41:37,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:37,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619942815] [2021-12-14 19:41:37,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619942815] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:37,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555836814] [2021-12-14 19:41:37,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 19:41:37,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:37,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:37,060 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) [2021-12-14 19:41:37,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-14 19:41:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:37,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 19:41:37,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9231 backedges. 6271 proven. 1132 refuted. 0 times theorem prover too weak. 1828 trivial. 0 not checked. [2021-12-14 19:41:38,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:38,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9231 backedges. 6271 proven. 1132 refuted. 0 times theorem prover too weak. 1828 trivial. 0 not checked. [2021-12-14 19:41:38,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555836814] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:38,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:38,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 33 [2021-12-14 19:41:38,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66326588] [2021-12-14 19:41:38,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:38,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 19:41:38,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:38,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 19:41:38,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 19:41:38,677 INFO L87 Difference]: Start difference. First operand 390 states and 400 transitions. Second operand has 33 states, 33 states have (on average 6.424242424242424) internal successors, (212), 33 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) [2021-12-14 19:41:39,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:39,910 INFO L93 Difference]: Finished difference Result 390 states and 396 transitions. [2021-12-14 19:41:39,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-14 19:41:39,911 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.424242424242424) internal successors, (212), 33 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) Word has length 359 [2021-12-14 19:41:39,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:39,912 INFO L225 Difference]: With dead ends: 390 [2021-12-14 19:41:39,912 INFO L226 Difference]: Without dead ends: 390 [2021-12-14 19:41:39,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 705 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=4619, Unknown=0, NotChecked=0, Total=5700 [2021-12-14 19:41:39,914 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 122 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 1739 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:39,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 115 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1739 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 19:41:39,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-12-14 19:41:39,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2021-12-14 19:41:39,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0179948586118253) internal successors, (396), 389 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:39,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 396 transitions. [2021-12-14 19:41:39,921 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 396 transitions. Word has length 359 [2021-12-14 19:41:39,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:39,921 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 396 transitions. [2021-12-14 19:41:39,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.424242424242424) internal successors, (212), 33 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) [2021-12-14 19:41:39,922 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 396 transitions. [2021-12-14 19:41:39,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-12-14 19:41:39,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:39,923 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 61, 61, 61, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2021-12-14 19:41:39,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:40,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:40,143 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:40,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:40,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1672251698, now seen corresponding path program 8 times [2021-12-14 19:41:40,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:40,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787416565] [2021-12-14 19:41:40,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:40,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 5971 proven. 552 refuted. 0 times theorem prover too weak. 3629 trivial. 0 not checked. [2021-12-14 19:41:40,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:40,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787416565] [2021-12-14 19:41:40,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787416565] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:40,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627236240] [2021-12-14 19:41:40,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:41:40,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:40,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:40,455 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) [2021-12-14 19:41:40,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-14 19:41:40,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:41:40,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:40,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 1206 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 19:41:40,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:41,541 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 7207 proven. 1646 refuted. 0 times theorem prover too weak. 1299 trivial. 0 not checked. [2021-12-14 19:41:41,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 7207 proven. 1646 refuted. 0 times theorem prover too weak. 1299 trivial. 0 not checked. [2021-12-14 19:41:42,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627236240] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:42,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:42,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 37 [2021-12-14 19:41:42,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782918091] [2021-12-14 19:41:42,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:42,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-14 19:41:42,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:42,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-14 19:41:42,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 19:41:42,169 INFO L87 Difference]: Start difference. First operand 390 states and 396 transitions. Second operand has 37 states, 37 states have (on average 6.45945945945946) internal successors, (239), 37 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:43,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:43,826 INFO L93 Difference]: Finished difference Result 390 states and 393 transitions. [2021-12-14 19:41:43,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-14 19:41:43,826 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.45945945945946) internal successors, (239), 37 states have internal predecessors, (239), 0 states have call successors, (0), 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 374 [2021-12-14 19:41:43,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:43,828 INFO L225 Difference]: With dead ends: 390 [2021-12-14 19:41:43,828 INFO L226 Difference]: Without dead ends: 390 [2021-12-14 19:41:43,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 733 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2021 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1487, Invalid=6523, Unknown=0, NotChecked=0, Total=8010 [2021-12-14 19:41:43,830 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 135 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2593 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:43,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 155 Invalid, 2623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2593 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 19:41:43,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-12-14 19:41:43,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2021-12-14 19:41:43,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0102827763496145) internal successors, (393), 389 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:43,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 393 transitions. [2021-12-14 19:41:43,836 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 393 transitions. Word has length 374 [2021-12-14 19:41:43,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:43,836 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 393 transitions. [2021-12-14 19:41:43,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.45945945945946) internal successors, (239), 37 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:43,837 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 393 transitions. [2021-12-14 19:41:43,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2021-12-14 19:41:43,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:43,839 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 63, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2021-12-14 19:41:43,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-14 19:41:44,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:44,047 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:44,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:44,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1649762294, now seen corresponding path program 9 times [2021-12-14 19:41:44,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:44,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524827300] [2021-12-14 19:41:44,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:44,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 7073 proven. 2819 refuted. 0 times theorem prover too weak. 899 trivial. 0 not checked. [2021-12-14 19:41:44,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:44,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524827300] [2021-12-14 19:41:44,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524827300] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:44,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278250117] [2021-12-14 19:41:44,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 19:41:44,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:44,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:44,400 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:41:44,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-14 19:41:44,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-14 19:41:44,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:44,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-14 19:41:44,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:44,608 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:41:44,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:41:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 3163 refuted. 0 times theorem prover too weak. 7628 trivial. 0 not checked. [2021-12-14 19:41:46,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 3163 refuted. 0 times theorem prover too weak. 7628 trivial. 0 not checked. [2021-12-14 19:41:48,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278250117] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:48,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:48,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 14] total 47 [2021-12-14 19:41:48,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717309494] [2021-12-14 19:41:48,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:48,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-14 19:41:48,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:48,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-14 19:41:48,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=1752, Unknown=0, NotChecked=0, Total=2162 [2021-12-14 19:41:48,294 INFO L87 Difference]: Start difference. First operand 390 states and 393 transitions. Second operand has 47 states, 47 states have (on average 6.191489361702128) internal successors, (291), 47 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:52,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:41:52,223 INFO L93 Difference]: Finished difference Result 522 states and 535 transitions. [2021-12-14 19:41:52,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-12-14 19:41:52,224 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 6.191489361702128) internal successors, (291), 47 states have internal predecessors, (291), 0 states have call successors, (0), 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 384 [2021-12-14 19:41:52,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:41:52,226 INFO L225 Difference]: With dead ends: 522 [2021-12-14 19:41:52,226 INFO L226 Difference]: Without dead ends: 522 [2021-12-14 19:41:52,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 742 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6568 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5229, Invalid=18333, Unknown=0, NotChecked=0, Total=23562 [2021-12-14 19:41:52,228 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 602 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 19:41:52,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 267 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 19:41:52,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-12-14 19:41:52,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 450. [2021-12-14 19:41:52,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.0311804008908685) internal successors, (463), 449 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:52,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 463 transitions. [2021-12-14 19:41:52,234 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 463 transitions. Word has length 384 [2021-12-14 19:41:52,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:41:52,235 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 463 transitions. [2021-12-14 19:41:52,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 6.191489361702128) internal successors, (291), 47 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:41:52,235 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 463 transitions. [2021-12-14 19:41:52,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2021-12-14 19:41:52,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:41:52,238 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 76, 76, 76, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2021-12-14 19:41:52,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-14 19:41:52,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:52,462 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-12-14 19:41:52,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:41:52,462 INFO L85 PathProgramCache]: Analyzing trace with hash -2070971837, now seen corresponding path program 10 times [2021-12-14 19:41:52,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:41:52,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321504032] [2021-12-14 19:41:52,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:41:52,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:41:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:41:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 417 proven. 13839 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2021-12-14 19:41:52,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:41:52,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321504032] [2021-12-14 19:41:52,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321504032] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:41:52,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570765200] [2021-12-14 19:41:52,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 19:41:52,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:41:52,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:41:52,857 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:41:52,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-14 19:41:53,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 19:41:53,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:41:53,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-14 19:41:53,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:41:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 1329 proven. 13224 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2021-12-14 19:41:54,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:41:56,028 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 1329 proven. 13224 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2021-12-14 19:41:56,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570765200] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:41:56,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:41:56,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 35, 35] total 70 [2021-12-14 19:41:56,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845137757] [2021-12-14 19:41:56,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:41:56,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-14 19:41:56,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:41:56,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-14 19:41:56,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1339, Invalid=3491, Unknown=0, NotChecked=0, Total=4830 [2021-12-14 19:41:56,031 INFO L87 Difference]: Start difference. First operand 450 states and 463 transitions. Second operand has 70 states, 70 states have (on average 6.642857142857143) internal successors, (465), 70 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)