./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0220.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0220.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1080615baa8f6ab055f34c400ddd3cb1288c5bcfd5f3427bea182230e940eff7 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 18:04:26,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 18:04:26,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 18:04:26,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 18:04:26,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 18:04:26,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 18:04:26,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 18:04:26,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 18:04:26,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 18:04:26,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 18:04:26,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 18:04:26,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 18:04:26,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 18:04:26,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 18:04:26,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 18:04:26,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 18:04:26,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 18:04:26,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 18:04:26,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 18:04:26,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 18:04:26,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 18:04:26,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 18:04:26,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 18:04:26,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 18:04:26,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 18:04:26,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 18:04:26,540 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 18:04:26,541 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 18:04:26,541 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 18:04:26,542 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 18:04:26,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 18:04:26,542 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 18:04:26,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 18:04:26,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 18:04:26,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 18:04:26,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 18:04:26,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 18:04:26,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 18:04:26,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 18:04:26,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 18:04:26,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 18:04:26,547 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-21 18:04:26,560 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 18:04:26,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 18:04:26,560 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 18:04:26,561 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 18:04:26,561 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 18:04:26,561 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 18:04:26,562 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 18:04:26,562 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 18:04:26,562 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 18:04:26,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 18:04:26,562 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 18:04:26,562 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 18:04:26,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 18:04:26,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 18:04:26,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 18:04:26,563 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 18:04:26,563 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 18:04:26,563 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 18:04:26,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 18:04:26,564 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 18:04:26,564 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 18:04:26,564 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 18:04:26,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 18:04:26,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 18:04:26,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 18:04:26,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:04:26,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 18:04:26,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 18:04:26,565 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 18:04:26,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 18:04:26,565 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 18:04:26,565 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1080615baa8f6ab055f34c400ddd3cb1288c5bcfd5f3427bea182230e940eff7 [2021-12-21 18:04:26,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 18:04:26,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 18:04:26,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 18:04:26,766 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 18:04:26,766 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 18:04:26,767 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0220.i [2021-12-21 18:04:26,820 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3b2d5b6f/e918d0186f5f48af9d5ff0c30b5ab892/FLAG232c20f94 [2021-12-21 18:04:27,231 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 18:04:27,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0220.i [2021-12-21 18:04:27,240 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3b2d5b6f/e918d0186f5f48af9d5ff0c30b5ab892/FLAG232c20f94 [2021-12-21 18:04:27,249 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3b2d5b6f/e918d0186f5f48af9d5ff0c30b5ab892 [2021-12-21 18:04:27,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 18:04:27,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 18:04:27,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 18:04:27,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 18:04:27,255 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 18:04:27,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:04:27" (1/1) ... [2021-12-21 18:04:27,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65c6a524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:27, skipping insertion in model container [2021-12-21 18:04:27,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:04:27" (1/1) ... [2021-12-21 18:04:27,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 18:04:27,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:04:27,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:04:27,584 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 18:04:27,637 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:04:27,658 INFO L208 MainTranslator]: Completed translation [2021-12-21 18:04:27,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:27 WrapperNode [2021-12-21 18:04:27,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 18:04:27,660 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 18:04:27,660 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 18:04:27,660 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 18:04:27,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:27" (1/1) ... [2021-12-21 18:04:27,675 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:27" (1/1) ... [2021-12-21 18:04:27,704 INFO L137 Inliner]: procedures = 180, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 113 [2021-12-21 18:04:27,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 18:04:27,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 18:04:27,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 18:04:27,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 18:04:27,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:27" (1/1) ... [2021-12-21 18:04:27,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:27" (1/1) ... [2021-12-21 18:04:27,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:27" (1/1) ... [2021-12-21 18:04:27,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:27" (1/1) ... [2021-12-21 18:04:27,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:27" (1/1) ... [2021-12-21 18:04:27,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:27" (1/1) ... [2021-12-21 18:04:27,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:27" (1/1) ... [2021-12-21 18:04:27,739 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 18:04:27,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 18:04:27,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 18:04:27,740 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 18:04:27,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:27" (1/1) ... [2021-12-21 18:04:27,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:04:27,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:04:27,784 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 18:04:27,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 18:04:27,814 INFO L130 BoogieDeclarations]: Found specification of procedure calloc_model [2021-12-21 18:04:27,815 INFO L138 BoogieDeclarations]: Found implementation of procedure calloc_model [2021-12-21 18:04:27,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 18:04:27,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 18:04:27,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 18:04:27,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 18:04:27,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 18:04:27,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 18:04:27,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 18:04:27,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 18:04:27,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 18:04:27,885 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 18:04:27,886 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 18:04:28,116 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 18:04:28,121 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 18:04:28,121 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-21 18:04:28,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:04:28 BoogieIcfgContainer [2021-12-21 18:04:28,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 18:04:28,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 18:04:28,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 18:04:28,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 18:04:28,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 06:04:27" (1/3) ... [2021-12-21 18:04:28,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@472c9ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:04:28, skipping insertion in model container [2021-12-21 18:04:28,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:27" (2/3) ... [2021-12-21 18:04:28,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@472c9ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:04:28, skipping insertion in model container [2021-12-21 18:04:28,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:04:28" (3/3) ... [2021-12-21 18:04:28,141 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0220.i [2021-12-21 18:04:28,147 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 18:04:28,147 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2021-12-21 18:04:28,186 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 18:04:28,191 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 18:04:28,192 INFO L340 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2021-12-21 18:04:28,205 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 105 states have internal predecessors, (117), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:04:28,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-21 18:04:28,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:28,219 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-21 18:04:28,220 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-21 18:04:28,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:28,224 INFO L85 PathProgramCache]: Analyzing trace with hash 928072, now seen corresponding path program 1 times [2021-12-21 18:04:28,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:04:28,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107737009] [2021-12-21 18:04:28,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:28,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:04:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:28,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:04:28,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107737009] [2021-12-21 18:04:28,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107737009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:28,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:28,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:04:28,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42836474] [2021-12-21 18:04:28,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:28,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 18:04:28,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:04:28,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 18:04:28,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 18:04:28,373 INFO L87 Difference]: Start difference. First operand has 109 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 105 states have internal predecessors, (117), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:28,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:28,392 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2021-12-21 18:04:28,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 18:04:28,394 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-12-21 18:04:28,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:28,400 INFO L225 Difference]: With dead ends: 109 [2021-12-21 18:04:28,400 INFO L226 Difference]: Without dead ends: 107 [2021-12-21 18:04:28,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 18:04:28,405 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:28,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:04:28,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-21 18:04:28,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-12-21 18:04:28,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 58 states have (on average 1.8620689655172413) internal successors, (108), 103 states have internal predecessors, (108), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:04:28,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2021-12-21 18:04:28,439 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 4 [2021-12-21 18:04:28,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:28,440 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2021-12-21 18:04:28,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:28,440 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2021-12-21 18:04:28,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 18:04:28,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:28,441 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 18:04:28,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 18:04:28,442 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting calloc_modelErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-21 18:04:28,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:28,443 INFO L85 PathProgramCache]: Analyzing trace with hash 889700811, now seen corresponding path program 1 times [2021-12-21 18:04:28,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:04:28,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647735832] [2021-12-21 18:04:28,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:28,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:04:28,468 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:04:28,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [102914801] [2021-12-21 18:04:28,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:28,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:04:28,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:04:28,473 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:04:28,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 18:04:28,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:28,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 18:04:28,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:28,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:04:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:28,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:04:28,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:04:28,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647735832] [2021-12-21 18:04:28,630 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:04:28,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102914801] [2021-12-21 18:04:28,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102914801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:28,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:28,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:04:28,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331610179] [2021-12-21 18:04:28,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:28,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:04:28,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:04:28,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:04:28,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:04:28,635 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:28,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:28,709 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2021-12-21 18:04:28,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:04:28,710 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-21 18:04:28,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:28,711 INFO L225 Difference]: With dead ends: 106 [2021-12-21 18:04:28,711 INFO L226 Difference]: Without dead ends: 106 [2021-12-21 18:04:28,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:04:28,712 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 7 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:28,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 163 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:04:28,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-21 18:04:28,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-12-21 18:04:28,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 58 states have (on average 1.8448275862068966) internal successors, (107), 102 states have internal predecessors, (107), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:04:28,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2021-12-21 18:04:28,718 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 6 [2021-12-21 18:04:28,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:28,718 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2021-12-21 18:04:28,718 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:28,718 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2021-12-21 18:04:28,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 18:04:28,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:28,719 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:04:28,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 18:04:28,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:04:28,945 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting calloc_modelErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-21 18:04:28,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:28,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1810921558, now seen corresponding path program 1 times [2021-12-21 18:04:28,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:04:28,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071460999] [2021-12-21 18:04:28,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:28,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:04:28,957 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:04:28,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461418364] [2021-12-21 18:04:28,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:28,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:04:28,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:04:28,958 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:04:28,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 18:04:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:29,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 18:04:29,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:29,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:04:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:29,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:04:29,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:04:29,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071460999] [2021-12-21 18:04:29,109 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:04:29,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461418364] [2021-12-21 18:04:29,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461418364] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:29,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:29,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:04:29,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132004484] [2021-12-21 18:04:29,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:29,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:04:29,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:04:29,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:04:29,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:04:29,111 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:29,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:29,116 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2021-12-21 18:04:29,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:04:29,116 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-21 18:04:29,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:29,117 INFO L225 Difference]: With dead ends: 105 [2021-12-21 18:04:29,117 INFO L226 Difference]: Without dead ends: 105 [2021-12-21 18:04:29,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:04:29,118 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 0 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:29,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 176 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 41 Unchecked, 0.0s Time] [2021-12-21 18:04:29,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-21 18:04:29,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-12-21 18:04:29,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 58 states have (on average 1.8275862068965518) internal successors, (106), 101 states have internal predecessors, (106), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:04:29,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 110 transitions. [2021-12-21 18:04:29,124 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 110 transitions. Word has length 7 [2021-12-21 18:04:29,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:29,124 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 110 transitions. [2021-12-21 18:04:29,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:04:29,125 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 110 transitions. [2021-12-21 18:04:29,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-21 18:04:29,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:29,125 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] [2021-12-21 18:04:29,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:29,358 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,SelfDestructingSolverStorable2 [2021-12-21 18:04:29,358 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-21 18:04:29,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:29,358 INFO L85 PathProgramCache]: Analyzing trace with hash -713444144, now seen corresponding path program 1 times [2021-12-21 18:04:29,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:04:29,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436640502] [2021-12-21 18:04:29,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:29,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:04:29,370 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:04:29,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332682822] [2021-12-21 18:04:29,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:29,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:04:29,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:04:29,375 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:04:29,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 18:04:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:29,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 18:04:29,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:29,551 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:04:29,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-21 18:04:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:04:29,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:04:29,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:04:29,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436640502] [2021-12-21 18:04:29,555 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:04:29,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332682822] [2021-12-21 18:04:29,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332682822] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:29,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:29,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 18:04:29,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804867573] [2021-12-21 18:04:29,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:29,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 18:04:29,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:04:29,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 18:04:29,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:04:29,557 INFO L87 Difference]: Start difference. First operand 105 states and 110 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:04:29,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:29,712 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2021-12-21 18:04:29,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:04:29,713 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-12-21 18:04:29,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:29,715 INFO L225 Difference]: With dead ends: 128 [2021-12-21 18:04:29,715 INFO L226 Difference]: Without dead ends: 128 [2021-12-21 18:04:29,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-21 18:04:29,716 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 65 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:29,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 348 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:04:29,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-21 18:04:29,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2021-12-21 18:04:29,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 58 states have (on average 1.7758620689655173) internal successors, (103), 98 states have internal predecessors, (103), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:04:29,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2021-12-21 18:04:29,723 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 26 [2021-12-21 18:04:29,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:29,723 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2021-12-21 18:04:29,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:04:29,724 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2021-12-21 18:04:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-21 18:04:29,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:29,724 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] [2021-12-21 18:04:29,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:29,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:04:29,942 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-21 18:04:29,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:29,943 INFO L85 PathProgramCache]: Analyzing trace with hash -713444143, now seen corresponding path program 1 times [2021-12-21 18:04:29,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:04:29,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416779972] [2021-12-21 18:04:29,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:29,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:04:29,963 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:04:29,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377766459] [2021-12-21 18:04:29,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:29,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:04:29,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:04:29,992 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:04:29,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 18:04:30,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:30,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-21 18:04:30,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:33,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:33,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-21 18:04:34,157 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:04:34,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 18:04:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:04:34,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:04:34,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:04:34,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416779972] [2021-12-21 18:04:34,747 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:04:34,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377766459] [2021-12-21 18:04:34,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377766459] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:34,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:34,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 18:04:34,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607161051] [2021-12-21 18:04:34,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:34,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 18:04:34,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:04:34,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 18:04:34,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=70, Unknown=1, NotChecked=0, Total=90 [2021-12-21 18:04:34,749 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:04:34,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:34,755 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2021-12-21 18:04:34,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 18:04:34,756 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-12-21 18:04:34,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:34,756 INFO L225 Difference]: With dead ends: 110 [2021-12-21 18:04:34,756 INFO L226 Difference]: Without dead ends: 110 [2021-12-21 18:04:34,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=19, Invalid=70, Unknown=1, NotChecked=0, Total=90 [2021-12-21 18:04:34,757 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 0 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:34,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 452 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 326 Unchecked, 0.0s Time] [2021-12-21 18:04:34,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-21 18:04:34,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-12-21 18:04:34,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 65 states have (on average 1.7076923076923076) internal successors, (111), 105 states have internal predecessors, (111), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 18:04:34,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 117 transitions. [2021-12-21 18:04:34,762 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 117 transitions. Word has length 26 [2021-12-21 18:04:34,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:34,763 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 117 transitions. [2021-12-21 18:04:34,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:04:34,763 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 117 transitions. [2021-12-21 18:04:34,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 18:04:34,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:34,764 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] [2021-12-21 18:04:34,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:34,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:04:34,981 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-21 18:04:34,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:34,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1369822126, now seen corresponding path program 1 times [2021-12-21 18:04:34,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:04:34,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823405899] [2021-12-21 18:04:34,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:34,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:04:34,995 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:04:34,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496008693] [2021-12-21 18:04:34,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:34,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:04:34,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:04:35,032 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:04:35,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 18:04:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:35,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-21 18:04:35,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:35,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 18:04:35,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:35,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-21 18:04:35,414 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:04:35,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 18:04:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 18:04:35,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:04:35,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:04:35,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823405899] [2021-12-21 18:04:35,435 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:04:35,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496008693] [2021-12-21 18:04:35,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496008693] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:35,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:35,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 18:04:35,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271051735] [2021-12-21 18:04:35,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:35,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:04:35,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:04:35,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:04:35,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:04:35,437 INFO L87 Difference]: Start difference. First operand 110 states and 117 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:04:35,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:35,559 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2021-12-21 18:04:35,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:04:35,559 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-12-21 18:04:35,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:35,560 INFO L225 Difference]: With dead ends: 109 [2021-12-21 18:04:35,560 INFO L226 Difference]: Without dead ends: 109 [2021-12-21 18:04:35,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:04:35,561 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 8 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:35,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 366 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 165 Invalid, 0 Unknown, 170 Unchecked, 0.1s Time] [2021-12-21 18:04:35,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-21 18:04:35,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2021-12-21 18:04:35,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 97 states have internal predecessors, (102), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:04:35,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2021-12-21 18:04:35,565 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 27 [2021-12-21 18:04:35,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:35,565 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2021-12-21 18:04:35,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:04:35,565 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2021-12-21 18:04:35,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 18:04:35,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:35,566 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, 1] [2021-12-21 18:04:35,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:35,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:04:35,776 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-21 18:04:35,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:35,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1574944978, now seen corresponding path program 1 times [2021-12-21 18:04:35,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:04:35,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121065978] [2021-12-21 18:04:35,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:35,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:04:35,787 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:04:35,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [266986332] [2021-12-21 18:04:35,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:35,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:04:35,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:04:35,791 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:04:35,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 18:04:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:35,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 18:04:35,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 18:04:35,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:04:35,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:04:35,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121065978] [2021-12-21 18:04:35,912 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:04:35,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266986332] [2021-12-21 18:04:35,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266986332] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:35,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:35,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:04:35,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630330178] [2021-12-21 18:04:35,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:35,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:04:35,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:04:35,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:04:35,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:04:35,916 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:04:35,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:35,956 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2021-12-21 18:04:35,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:04:35,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-12-21 18:04:35,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:35,957 INFO L225 Difference]: With dead ends: 103 [2021-12-21 18:04:35,957 INFO L226 Difference]: Without dead ends: 103 [2021-12-21 18:04:35,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:04:35,958 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 84 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:35,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 91 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:04:35,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-21 18:04:35,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2021-12-21 18:04:35,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 58 states have (on average 1.7413793103448276) internal successors, (101), 96 states have internal predecessors, (101), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:04:35,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2021-12-21 18:04:35,964 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 28 [2021-12-21 18:04:35,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:35,964 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2021-12-21 18:04:35,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:04:35,964 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2021-12-21 18:04:35,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 18:04:35,965 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:35,965 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, 1, 1, 1] [2021-12-21 18:04:35,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-21 18:04:36,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:04:36,180 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-21 18:04:36,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:36,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1693634963, now seen corresponding path program 1 times [2021-12-21 18:04:36,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:04:36,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900924517] [2021-12-21 18:04:36,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:36,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:04:36,189 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:04:36,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738873682] [2021-12-21 18:04:36,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:36,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:04:36,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:04:36,212 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:04:36,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 18:04:36,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:36,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 18:04:36,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:36,397 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:04:36,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-21 18:04:36,420 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:04:36,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-21 18:04:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:36,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:04:36,609 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-21 18:04:36,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 18:04:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:36,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:04:36,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900924517] [2021-12-21 18:04:36,615 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:04:36,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738873682] [2021-12-21 18:04:36,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738873682] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:04:36,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:04:36,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-12-21 18:04:36,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984623436] [2021-12-21 18:04:36,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:04:36,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 18:04:36,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:04:36,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 18:04:36,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-21 18:04:36,617 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:04:36,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:36,822 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2021-12-21 18:04:36,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 18:04:36,822 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-12-21 18:04:36,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:36,824 INFO L225 Difference]: With dead ends: 142 [2021-12-21 18:04:36,824 INFO L226 Difference]: Without dead ends: 142 [2021-12-21 18:04:36,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-12-21 18:04:36,825 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 90 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:36,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 498 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 324 Invalid, 0 Unknown, 152 Unchecked, 0.1s Time] [2021-12-21 18:04:36,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-21 18:04:36,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 116. [2021-12-21 18:04:36,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 73 states have (on average 1.6027397260273972) internal successors, (117), 110 states have internal predecessors, (117), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 18:04:36,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 124 transitions. [2021-12-21 18:04:36,828 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 124 transitions. Word has length 30 [2021-12-21 18:04:36,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:36,828 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 124 transitions. [2021-12-21 18:04:36,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:04:36,829 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 124 transitions. [2021-12-21 18:04:36,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 18:04:36,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:36,829 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, 1, 1, 1] [2021-12-21 18:04:36,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:37,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:04:37,039 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-21 18:04:37,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:37,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1693634964, now seen corresponding path program 1 times [2021-12-21 18:04:37,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:04:37,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025101503] [2021-12-21 18:04:37,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:37,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:04:37,048 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:04:37,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720487696] [2021-12-21 18:04:37,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:37,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:04:37,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:04:37,051 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:04:37,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 18:04:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:37,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-21 18:04:37,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:48,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:48,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-21 18:04:48,068 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:04:48,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-21 18:04:49,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:49,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-21 18:04:49,635 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:04:49,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 18:04:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:52,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:04:53,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:04:53,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025101503] [2021-12-21 18:04:53,064 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:04:53,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720487696] [2021-12-21 18:04:53,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720487696] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:04:53,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:04:53,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-12-21 18:04:53,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996995847] [2021-12-21 18:04:53,065 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 18:04:53,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 18:04:53,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:04:53,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 18:04:53,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=176, Unknown=2, NotChecked=0, Total=210 [2021-12-21 18:04:53,065 INFO L87 Difference]: Start difference. First operand 116 states and 124 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:04:57,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:57,329 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2021-12-21 18:04:57,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 18:04:57,329 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-12-21 18:04:57,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:57,330 INFO L225 Difference]: With dead ends: 132 [2021-12-21 18:04:57,330 INFO L226 Difference]: Without dead ends: 132 [2021-12-21 18:04:57,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=54, Invalid=322, Unknown=4, NotChecked=0, Total=380 [2021-12-21 18:04:57,330 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 2 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 410 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:57,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 502 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 410 Unchecked, 0.0s Time] [2021-12-21 18:04:57,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-21 18:04:57,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2021-12-21 18:04:57,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 87 states have (on average 1.5172413793103448) internal successors, (132), 124 states have internal predecessors, (132), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-21 18:04:57,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 144 transitions. [2021-12-21 18:04:57,335 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 144 transitions. Word has length 30 [2021-12-21 18:04:57,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:57,335 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 144 transitions. [2021-12-21 18:04:57,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:04:57,335 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 144 transitions. [2021-12-21 18:04:57,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-21 18:04:57,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:57,336 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, 1, 1, 1, 1] [2021-12-21 18:04:57,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:57,536 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,SelfDestructingSolverStorable8 [2021-12-21 18:04:57,536 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-21 18:04:57,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:57,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1893307035, now seen corresponding path program 1 times [2021-12-21 18:04:57,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:04:57,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874023739] [2021-12-21 18:04:57,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:57,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:04:57,546 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:04:57,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090477306] [2021-12-21 18:04:57,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:57,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:04:57,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:04:57,563 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:04:57,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 18:04:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:57,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-21 18:04:57,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:58,546 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:04:58,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-21 18:04:58,806 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:04:58,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-21 18:04:59,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:59,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 18:04:59,272 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:04:59,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 18:04:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:04:59,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:00,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:00,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874023739] [2021-12-21 18:05:00,138 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:00,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090477306] [2021-12-21 18:05:00,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090477306] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:00,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:05:00,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-12-21 18:05:00,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502477531] [2021-12-21 18:05:00,138 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:00,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 18:05:00,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:00,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 18:05:00,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-12-21 18:05:00,139 INFO L87 Difference]: Start difference. First operand 132 states and 144 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:05:00,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:00,270 INFO L93 Difference]: Finished difference Result 140 states and 152 transitions. [2021-12-21 18:05:00,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 18:05:00,270 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2021-12-21 18:05:00,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:00,271 INFO L225 Difference]: With dead ends: 140 [2021-12-21 18:05:00,271 INFO L226 Difference]: Without dead ends: 140 [2021-12-21 18:05:00,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-12-21 18:05:00,272 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 2 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 446 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:00,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 546 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 446 Unchecked, 0.0s Time] [2021-12-21 18:05:00,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-21 18:05:00,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 128. [2021-12-21 18:05:00,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 84 states have (on average 1.5357142857142858) internal successors, (129), 121 states have internal predecessors, (129), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-21 18:05:00,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2021-12-21 18:05:00,276 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 31 [2021-12-21 18:05:00,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:00,276 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2021-12-21 18:05:00,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:05:00,277 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2021-12-21 18:05:00,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-21 18:05:00,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:00,277 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, 1, 1, 1, 1] [2021-12-21 18:05:00,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:00,487 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,SelfDestructingSolverStorable9 [2021-12-21 18:05:00,487 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-21 18:05:00,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:00,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1641652372, now seen corresponding path program 1 times [2021-12-21 18:05:00,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:00,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669733021] [2021-12-21 18:05:00,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:00,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:00,499 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:00,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823129984] [2021-12-21 18:05:00,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:00,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:00,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:00,501 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:05:00,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 18:05:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:00,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 18:05:00,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:00,710 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:05:00,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-21 18:05:00,730 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:05:00,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-21 18:05:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:05:00,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:00,903 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-21 18:05:00,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 18:05:00,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:05:00,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:00,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669733021] [2021-12-21 18:05:00,908 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:00,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823129984] [2021-12-21 18:05:00,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823129984] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:05:00,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:05:00,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-12-21 18:05:00,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204672327] [2021-12-21 18:05:00,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:00,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 18:05:00,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:00,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 18:05:00,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-21 18:05:00,909 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:05:01,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:01,101 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2021-12-21 18:05:01,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 18:05:01,102 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-12-21 18:05:01,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:01,102 INFO L225 Difference]: With dead ends: 157 [2021-12-21 18:05:01,102 INFO L226 Difference]: Without dead ends: 157 [2021-12-21 18:05:01,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-12-21 18:05:01,103 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 89 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:01,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 504 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 318 Invalid, 0 Unknown, 165 Unchecked, 0.1s Time] [2021-12-21 18:05:01,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-12-21 18:05:01,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 116. [2021-12-21 18:05:01,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 73 states have (on average 1.5890410958904109) internal successors, (116), 110 states have internal predecessors, (116), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:05:01,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 122 transitions. [2021-12-21 18:05:01,106 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 122 transitions. Word has length 31 [2021-12-21 18:05:01,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:01,106 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 122 transitions. [2021-12-21 18:05:01,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:05:01,106 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 122 transitions. [2021-12-21 18:05:01,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-21 18:05:01,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:01,107 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, 1, 1, 1, 1] [2021-12-21 18:05:01,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-21 18:05:01,307 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,SelfDestructingSolverStorable10 [2021-12-21 18:05:01,308 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-21 18:05:01,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:01,308 INFO L85 PathProgramCache]: Analyzing trace with hash 963076315, now seen corresponding path program 1 times [2021-12-21 18:05:01,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:01,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035588878] [2021-12-21 18:05:01,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:01,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:01,321 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:01,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212574655] [2021-12-21 18:05:01,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:01,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:01,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:01,322 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:05:01,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 18:05:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:01,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-21 18:05:01,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:01,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:05:01,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-21 18:05:03,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:03,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-21 18:05:03,321 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:05:03,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 18:05:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:05:04,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:05:04,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:04,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035588878] [2021-12-21 18:05:04,116 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:04,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212574655] [2021-12-21 18:05:04,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212574655] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:04,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:04,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 18:05:04,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214566631] [2021-12-21 18:05:04,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:04,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 18:05:04,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:04,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 18:05:04,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 18:05:04,117 INFO L87 Difference]: Start difference. First operand 116 states and 122 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:05:04,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:04,120 INFO L93 Difference]: Finished difference Result 142 states and 152 transitions. [2021-12-21 18:05:04,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 18:05:04,120 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2021-12-21 18:05:04,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:04,121 INFO L225 Difference]: With dead ends: 142 [2021-12-21 18:05:04,121 INFO L226 Difference]: Without dead ends: 142 [2021-12-21 18:05:04,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 18:05:04,122 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 3 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 337 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:04,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 442 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 337 Unchecked, 0.0s Time] [2021-12-21 18:05:04,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-21 18:05:04,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2021-12-21 18:05:04,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 96 states have (on average 1.4895833333333333) internal successors, (143), 133 states have internal predecessors, (143), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-21 18:05:04,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 152 transitions. [2021-12-21 18:05:04,128 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 152 transitions. Word has length 31 [2021-12-21 18:05:04,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:04,130 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 152 transitions. [2021-12-21 18:05:04,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:05:04,130 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 152 transitions. [2021-12-21 18:05:04,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-21 18:05:04,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:04,134 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, 1, 1, 1, 1, 1] [2021-12-21 18:05:04,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-21 18:05:04,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-21 18:05:04,336 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-21 18:05:04,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:04,336 INFO L85 PathProgramCache]: Analyzing trace with hash -648384006, now seen corresponding path program 1 times [2021-12-21 18:05:04,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:04,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186737498] [2021-12-21 18:05:04,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:04,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:04,345 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:04,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1229333074] [2021-12-21 18:05:04,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:04,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:04,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:04,347 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:05:04,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 18:05:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:04,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-21 18:05:04,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:04,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:05:04,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-21 18:05:11,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:11,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2021-12-21 18:05:11,915 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:05:11,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 18:05:15,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:05:15,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:18,344 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-21 18:05:18,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-12-21 18:05:18,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:05:18,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:18,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186737498] [2021-12-21 18:05:18,598 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:18,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229333074] [2021-12-21 18:05:18,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229333074] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:05:18,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:05:18,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-12-21 18:05:18,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079055863] [2021-12-21 18:05:18,598 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:18,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-21 18:05:18,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:18,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-21 18:05:18,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-12-21 18:05:18,599 INFO L87 Difference]: Start difference. First operand 141 states and 152 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 18:05:18,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:18,645 INFO L93 Difference]: Finished difference Result 196 states and 218 transitions. [2021-12-21 18:05:18,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 18:05:18,646 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-12-21 18:05:18,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:18,646 INFO L225 Difference]: With dead ends: 196 [2021-12-21 18:05:18,646 INFO L226 Difference]: Without dead ends: 196 [2021-12-21 18:05:18,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-12-21 18:05:18,647 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 85 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 642 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:18,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 617 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 642 Unchecked, 0.0s Time] [2021-12-21 18:05:18,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-21 18:05:18,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 145. [2021-12-21 18:05:18,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 100 states have (on average 1.51) internal successors, (151), 137 states have internal predecessors, (151), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-21 18:05:18,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 160 transitions. [2021-12-21 18:05:18,651 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 160 transitions. Word has length 32 [2021-12-21 18:05:18,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:18,651 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 160 transitions. [2021-12-21 18:05:18,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 18:05:18,651 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 160 transitions. [2021-12-21 18:05:18,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-21 18:05:18,652 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:18,652 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, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:18,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-21 18:05:18,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-21 18:05:18,852 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-21 18:05:18,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:18,853 INFO L85 PathProgramCache]: Analyzing trace with hash 2098369628, now seen corresponding path program 1 times [2021-12-21 18:05:18,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:18,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453693978] [2021-12-21 18:05:18,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:18,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:18,864 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:18,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270501553] [2021-12-21 18:05:18,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:18,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:18,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:18,866 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:05:18,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 18:05:18,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:18,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 18:05:18,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 18:05:18,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:05:18,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:18,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453693978] [2021-12-21 18:05:18,977 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:18,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270501553] [2021-12-21 18:05:18,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270501553] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:18,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:18,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:05:18,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451750188] [2021-12-21 18:05:18,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:18,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:05:18,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:18,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:05:18,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:05:18,979 INFO L87 Difference]: Start difference. First operand 145 states and 160 transitions. Second operand has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:05:19,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:19,031 INFO L93 Difference]: Finished difference Result 146 states and 163 transitions. [2021-12-21 18:05:19,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:05:19,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2021-12-21 18:05:19,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:19,032 INFO L225 Difference]: With dead ends: 146 [2021-12-21 18:05:19,032 INFO L226 Difference]: Without dead ends: 146 [2021-12-21 18:05:19,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:05:19,034 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 75 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:19,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 97 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:05:19,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-21 18:05:19,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2021-12-21 18:05:19,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 100 states have (on average 1.5) internal successors, (150), 136 states have internal predecessors, (150), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-21 18:05:19,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 159 transitions. [2021-12-21 18:05:19,039 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 159 transitions. Word has length 33 [2021-12-21 18:05:19,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:19,040 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 159 transitions. [2021-12-21 18:05:19,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:05:19,040 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 159 transitions. [2021-12-21 18:05:19,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 18:05:19,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:19,041 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:19,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:19,258 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,SelfDestructingSolverStorable13 [2021-12-21 18:05:19,258 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-21 18:05:19,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:19,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1489188326, now seen corresponding path program 2 times [2021-12-21 18:05:19,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:19,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191954033] [2021-12-21 18:05:19,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:19,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:19,276 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:19,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [413422460] [2021-12-21 18:05:19,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:05:19,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:19,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:19,282 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:05:19,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 18:05:19,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:05:19,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:05:19,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-21 18:05:19,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:19,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:05:19,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-21 18:05:20,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:20,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-21 18:05:20,513 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:05:20,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 18:05:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:05:22,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:23,626 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-21 18:05:23,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-12-21 18:05:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:05:23,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:23,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191954033] [2021-12-21 18:05:23,750 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:23,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413422460] [2021-12-21 18:05:23,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413422460] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:05:23,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:05:23,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-12-21 18:05:23,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058456279] [2021-12-21 18:05:23,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:23,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-21 18:05:23,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:23,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-21 18:05:23,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-12-21 18:05:23,752 INFO L87 Difference]: Start difference. First operand 144 states and 159 transitions. Second operand has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 18:05:23,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:23,797 INFO L93 Difference]: Finished difference Result 174 states and 194 transitions. [2021-12-21 18:05:23,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 18:05:23,797 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2021-12-21 18:05:23,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:23,798 INFO L225 Difference]: With dead ends: 174 [2021-12-21 18:05:23,798 INFO L226 Difference]: Without dead ends: 174 [2021-12-21 18:05:23,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-12-21 18:05:23,799 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 83 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 603 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:23,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 733 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 603 Unchecked, 0.0s Time] [2021-12-21 18:05:23,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-21 18:05:23,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 146. [2021-12-21 18:05:23,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 102 states have (on average 1.5098039215686274) internal successors, (154), 138 states have internal predecessors, (154), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-21 18:05:23,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 163 transitions. [2021-12-21 18:05:23,802 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 163 transitions. Word has length 34 [2021-12-21 18:05:23,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:23,802 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 163 transitions. [2021-12-21 18:05:23,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 18:05:23,802 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 163 transitions. [2021-12-21 18:05:23,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 18:05:23,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:23,803 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:23,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:24,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:24,011 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-21 18:05:24,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:24,012 INFO L85 PathProgramCache]: Analyzing trace with hash 640823451, now seen corresponding path program 3 times [2021-12-21 18:05:24,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:24,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686830500] [2021-12-21 18:05:24,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:24,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:24,020 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:24,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075590615] [2021-12-21 18:05:24,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 18:05:24,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:24,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:24,021 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:05:24,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-21 18:05:24,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-21 18:05:24,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:05:24,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-21 18:05:24,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:24,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-21 18:05:24,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-21 18:05:27,605 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:05:27,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-21 18:05:27,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2021-12-21 18:05:30,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:30,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:30,594 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-21 18:05:30,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2021-12-21 18:05:30,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:30,640 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-21 18:05:30,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-21 18:05:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 18:05:33,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:34,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:34,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686830500] [2021-12-21 18:05:34,471 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:34,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075590615] [2021-12-21 18:05:34,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075590615] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:34,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:05:34,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-12-21 18:05:34,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634086297] [2021-12-21 18:05:34,471 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:34,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 18:05:34,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:34,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 18:05:34,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-12-21 18:05:34,472 INFO L87 Difference]: Start difference. First operand 146 states and 163 transitions. Second operand has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:05:36,491 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-21 18:05:38,495 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-21 18:05:40,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:40,157 INFO L93 Difference]: Finished difference Result 172 states and 191 transitions. [2021-12-21 18:05:40,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 18:05:40,158 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2021-12-21 18:05:40,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:40,159 INFO L225 Difference]: With dead ends: 172 [2021-12-21 18:05:40,159 INFO L226 Difference]: Without dead ends: 156 [2021-12-21 18:05:40,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-12-21 18:05:40,160 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 3 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 472 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:40,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 705 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 397 Invalid, 2 Unknown, 472 Unchecked, 4.4s Time] [2021-12-21 18:05:40,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-21 18:05:40,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2021-12-21 18:05:40,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 109 states have (on average 1.4770642201834863) internal successors, (161), 147 states have internal predecessors, (161), 4 states have call successors, (4), 2 states have call predecessors, (4), 6 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-21 18:05:40,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 175 transitions. [2021-12-21 18:05:40,163 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 175 transitions. Word has length 35 [2021-12-21 18:05:40,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:40,164 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 175 transitions. [2021-12-21 18:05:40,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:05:40,164 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 175 transitions. [2021-12-21 18:05:40,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-21 18:05:40,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:40,164 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:05:40,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:40,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-21 18:05:40,382 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 42 more)] === [2021-12-21 18:05:40,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:40,382 INFO L85 PathProgramCache]: Analyzing trace with hash -45220876, now seen corresponding path program 4 times [2021-12-21 18:05:40,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:40,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245147103] [2021-12-21 18:05:40,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:40,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:40,395 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:40,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811671623] [2021-12-21 18:05:40,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 18:05:40,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:40,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:40,397 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:05:40,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-21 18:05:40,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 18:05:40,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:05:40,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-21 18:05:40,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:40,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:40,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 18:05:41,016 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:05:41,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11