./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext-properties/test-0217_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-ext-properties/test-0217_1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e4aac8fd1b71e0bd84f9ab8e5c238dc6bf3a295fcb9cebe504ba6d0c9a6a7b7a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 18:07:51,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 18:07:51,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 18:07:51,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 18:07:51,995 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 18:07:51,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 18:07:51,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 18:07:51,999 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 18:07:52,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 18:07:52,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 18:07:52,010 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 18:07:52,011 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 18:07:52,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 18:07:52,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 18:07:52,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 18:07:52,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 18:07:52,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 18:07:52,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 18:07:52,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 18:07:52,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 18:07:52,032 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 18:07:52,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 18:07:52,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 18:07:52,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 18:07:52,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 18:07:52,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 18:07:52,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 18:07:52,042 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 18:07:52,043 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 18:07:52,044 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 18:07:52,044 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 18:07:52,045 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 18:07:52,046 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 18:07:52,047 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 18:07:52,048 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 18:07:52,049 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 18:07:52,049 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 18:07:52,049 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 18:07:52,050 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 18:07:52,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 18:07:52,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 18:07:52,052 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-21 18:07:52,080 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 18:07:52,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 18:07:52,081 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 18:07:52,081 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 18:07:52,082 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 18:07:52,082 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 18:07:52,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 18:07:52,083 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 18:07:52,083 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 18:07:52,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 18:07:52,084 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 18:07:52,084 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 18:07:52,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 18:07:52,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 18:07:52,085 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 18:07:52,085 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 18:07:52,085 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 18:07:52,085 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 18:07:52,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 18:07:52,086 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 18:07:52,086 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 18:07:52,086 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 18:07:52,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 18:07:52,086 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 18:07:52,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 18:07:52,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:07:52,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 18:07:52,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 18:07:52,087 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 18:07:52,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 18:07:52,088 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 18:07:52,088 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4aac8fd1b71e0bd84f9ab8e5c238dc6bf3a295fcb9cebe504ba6d0c9a6a7b7a [2021-12-21 18:07:52,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 18:07:52,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 18:07:52,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 18:07:52,330 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 18:07:52,330 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 18:07:52,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/test-0217_1.i [2021-12-21 18:07:52,403 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a49e2431/b059e92369d6434e9a762a0839570eb5/FLAG51002e175 [2021-12-21 18:07:52,835 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 18:07:52,836 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/test-0217_1.i [2021-12-21 18:07:52,854 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a49e2431/b059e92369d6434e9a762a0839570eb5/FLAG51002e175 [2021-12-21 18:07:53,205 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a49e2431/b059e92369d6434e9a762a0839570eb5 [2021-12-21 18:07:53,207 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 18:07:53,209 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 18:07:53,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 18:07:53,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 18:07:53,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 18:07:53,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:07:53" (1/1) ... [2021-12-21 18:07:53,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e7b52b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:07:53, skipping insertion in model container [2021-12-21 18:07:53,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:07:53" (1/1) ... [2021-12-21 18:07:53,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 18:07:53,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:07:53,517 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:07:53,525 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 18:07:53,563 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:07:53,597 INFO L208 MainTranslator]: Completed translation [2021-12-21 18:07:53,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:07:53 WrapperNode [2021-12-21 18:07:53,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 18:07:53,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 18:07:53,599 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 18:07:53,600 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 18:07:53,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:07:53" (1/1) ... [2021-12-21 18:07:53,630 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:07:53" (1/1) ... [2021-12-21 18:07:53,653 INFO L137 Inliner]: procedures = 181, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 257 [2021-12-21 18:07:53,653 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 18:07:53,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 18:07:53,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 18:07:53,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 18:07:53,661 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:07:53" (1/1) ... [2021-12-21 18:07:53,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:07:53" (1/1) ... [2021-12-21 18:07:53,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:07:53" (1/1) ... [2021-12-21 18:07:53,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:07:53" (1/1) ... [2021-12-21 18:07:53,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:07:53" (1/1) ... [2021-12-21 18:07:53,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:07:53" (1/1) ... [2021-12-21 18:07:53,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:07:53" (1/1) ... [2021-12-21 18:07:53,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 18:07:53,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 18:07:53,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 18:07:53,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 18:07:53,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:07:53" (1/1) ... [2021-12-21 18:07:53,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:07:53,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:07:53,740 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 18:07:53,742 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 18:07:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2021-12-21 18:07:53,805 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2021-12-21 18:07:53,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 18:07:53,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 18:07:53,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 18:07:53,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 18:07:53,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 18:07:53,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 18:07:53,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 18:07:53,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 18:07:53,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 18:07:53,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 18:07:53,917 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 18:07:53,918 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 18:07:54,319 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 18:07:54,328 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 18:07:54,329 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-21 18:07:54,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:07:54 BoogieIcfgContainer [2021-12-21 18:07:54,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 18:07:54,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 18:07:54,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 18:07:54,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 18:07:54,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 06:07:53" (1/3) ... [2021-12-21 18:07:54,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb12d95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:07:54, skipping insertion in model container [2021-12-21 18:07:54,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:07:53" (2/3) ... [2021-12-21 18:07:54,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb12d95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:07:54, skipping insertion in model container [2021-12-21 18:07:54,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:07:54" (3/3) ... [2021-12-21 18:07:54,339 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0217_1.i [2021-12-21 18:07:54,344 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 18:07:54,344 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2021-12-21 18:07:54,382 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 18:07:54,388 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 18:07:54,388 INFO L340 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2021-12-21 18:07:54,401 INFO L276 IsEmpty]: Start isEmpty. Operand has 174 states, 103 states have (on average 1.9514563106796117) internal successors, (201), 170 states have internal predecessors, (201), 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 18:07:54,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 18:07:54,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:54,411 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 18:07:54,411 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:07:54,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:54,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1046105098, now seen corresponding path program 1 times [2021-12-21 18:07:54,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:07:54,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680447499] [2021-12-21 18:07:54,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:54,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:07:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:54,565 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 18:07:54,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:07:54,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680447499] [2021-12-21 18:07:54,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680447499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:54,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:54,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:07:54,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924568393] [2021-12-21 18:07:54,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:54,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 18:07:54,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:07:54,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 18:07:54,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 18:07:54,607 INFO L87 Difference]: Start difference. First operand has 174 states, 103 states have (on average 1.9514563106796117) internal successors, (201), 170 states have internal predecessors, (201), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:07:54,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:54,644 INFO L93 Difference]: Finished difference Result 174 states and 198 transitions. [2021-12-21 18:07:54,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 18:07:54,646 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-21 18:07:54,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:54,656 INFO L225 Difference]: With dead ends: 174 [2021-12-21 18:07:54,657 INFO L226 Difference]: Without dead ends: 172 [2021-12-21 18:07:54,659 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 18:07:54,677 INFO L933 BasicCegarLoop]: 198 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, 198 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 18:07:54,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:07:54,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-12-21 18:07:54,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2021-12-21 18:07:54,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 102 states have (on average 1.8823529411764706) internal successors, (192), 168 states have internal predecessors, (192), 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 18:07:54,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 196 transitions. [2021-12-21 18:07:54,738 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 196 transitions. Word has length 6 [2021-12-21 18:07:54,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:54,738 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 196 transitions. [2021-12-21 18:07:54,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:07:54,739 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 196 transitions. [2021-12-21 18:07:54,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 18:07:54,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:54,740 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:54,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 18:07:54,740 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:07:54,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:54,744 INFO L85 PathProgramCache]: Analyzing trace with hash 594388414, now seen corresponding path program 1 times [2021-12-21 18:07:54,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:07:54,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709211155] [2021-12-21 18:07:54,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:54,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:07:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:54,814 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 18:07:54,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:07:54,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709211155] [2021-12-21 18:07:54,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709211155] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:54,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:54,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:07:54,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854543067] [2021-12-21 18:07:54,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:54,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:07:54,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:07:54,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:07:54,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:07:54,819 INFO L87 Difference]: Start difference. First operand 172 states and 196 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states 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 18:07:54,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:54,897 INFO L93 Difference]: Finished difference Result 339 states and 387 transitions. [2021-12-21 18:07:54,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:07:54,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-21 18:07:54,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:54,903 INFO L225 Difference]: With dead ends: 339 [2021-12-21 18:07:54,905 INFO L226 Difference]: Without dead ends: 339 [2021-12-21 18:07:54,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:07:54,907 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 185 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:54,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 727 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:07:54,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-12-21 18:07:54,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 174. [2021-12-21 18:07:54,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 104 states have (on average 1.8653846153846154) internal successors, (194), 170 states have internal predecessors, (194), 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 18:07:54,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 198 transitions. [2021-12-21 18:07:54,926 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 198 transitions. Word has length 8 [2021-12-21 18:07:54,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:54,926 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 198 transitions. [2021-12-21 18:07:54,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states 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 18:07:54,928 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 198 transitions. [2021-12-21 18:07:54,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 18:07:54,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:54,929 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:54,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 18:07:54,929 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:07:54,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:54,931 INFO L85 PathProgramCache]: Analyzing trace with hash 592541372, now seen corresponding path program 1 times [2021-12-21 18:07:54,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:07:54,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253263707] [2021-12-21 18:07:54,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:54,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:07:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:55,015 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 18:07:55,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:07:55,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253263707] [2021-12-21 18:07:55,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253263707] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:55,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:55,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-21 18:07:55,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583856049] [2021-12-21 18:07:55,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:55,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:07:55,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:07:55,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:07:55,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:07:55,021 INFO L87 Difference]: Start difference. First operand 174 states and 198 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states 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 18:07:55,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:55,194 INFO L93 Difference]: Finished difference Result 337 states and 384 transitions. [2021-12-21 18:07:55,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:07:55,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-21 18:07:55,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:55,197 INFO L225 Difference]: With dead ends: 337 [2021-12-21 18:07:55,197 INFO L226 Difference]: Without dead ends: 337 [2021-12-21 18:07:55,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:07:55,209 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 176 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:55,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 261 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:07:55,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-12-21 18:07:55,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 241. [2021-12-21 18:07:55,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 168 states have (on average 1.8571428571428572) internal successors, (312), 234 states have internal predecessors, (312), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:07:55,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 320 transitions. [2021-12-21 18:07:55,235 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 320 transitions. Word has length 8 [2021-12-21 18:07:55,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:55,236 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 320 transitions. [2021-12-21 18:07:55,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states 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 18:07:55,236 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 320 transitions. [2021-12-21 18:07:55,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 18:07:55,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:55,237 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:55,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 18:07:55,237 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:07:55,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:55,238 INFO L85 PathProgramCache]: Analyzing trace with hash 592541373, now seen corresponding path program 1 times [2021-12-21 18:07:55,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:07:55,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905500476] [2021-12-21 18:07:55,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:55,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:07:55,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:55,383 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 18:07:55,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:07:55,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905500476] [2021-12-21 18:07:55,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905500476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:55,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:55,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:07:55,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176975454] [2021-12-21 18:07:55,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:55,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:07:55,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:07:55,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:07:55,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:07:55,387 INFO L87 Difference]: Start difference. First operand 241 states and 320 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states 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 18:07:55,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:55,576 INFO L93 Difference]: Finished difference Result 392 states and 502 transitions. [2021-12-21 18:07:55,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:07:55,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-21 18:07:55,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:55,578 INFO L225 Difference]: With dead ends: 392 [2021-12-21 18:07:55,579 INFO L226 Difference]: Without dead ends: 392 [2021-12-21 18:07:55,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:07:55,590 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 147 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:55,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 440 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:07:55,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-12-21 18:07:55,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 326. [2021-12-21 18:07:55,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 247 states have (on average 1.8178137651821862) internal successors, (449), 315 states have internal predecessors, (449), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-21 18:07:55,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 465 transitions. [2021-12-21 18:07:55,615 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 465 transitions. Word has length 8 [2021-12-21 18:07:55,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:55,616 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 465 transitions. [2021-12-21 18:07:55,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states 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 18:07:55,616 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 465 transitions. [2021-12-21 18:07:55,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 18:07:55,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:55,617 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:55,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 18:07:55,617 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:07:55,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:55,618 INFO L85 PathProgramCache]: Analyzing trace with hash 592541435, now seen corresponding path program 1 times [2021-12-21 18:07:55,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:07:55,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212170121] [2021-12-21 18:07:55,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:55,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:07:55,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:55,749 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 18:07:55,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:07:55,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212170121] [2021-12-21 18:07:55,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212170121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:55,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:55,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:07:55,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530166580] [2021-12-21 18:07:55,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:55,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:07:55,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:07:55,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:07:55,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:07:55,752 INFO L87 Difference]: Start difference. First operand 326 states and 465 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states 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 18:07:55,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:55,918 INFO L93 Difference]: Finished difference Result 391 states and 500 transitions. [2021-12-21 18:07:55,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:07:55,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-21 18:07:55,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:55,921 INFO L225 Difference]: With dead ends: 391 [2021-12-21 18:07:55,921 INFO L226 Difference]: Without dead ends: 391 [2021-12-21 18:07:55,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:07:55,922 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 129 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:55,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 454 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:07:55,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-12-21 18:07:55,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 326. [2021-12-21 18:07:55,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 247 states have (on average 1.8178137651821862) internal successors, (449), 315 states have internal predecessors, (449), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-21 18:07:55,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 465 transitions. [2021-12-21 18:07:55,934 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 465 transitions. Word has length 8 [2021-12-21 18:07:55,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:55,935 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 465 transitions. [2021-12-21 18:07:55,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states 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 18:07:55,935 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 465 transitions. [2021-12-21 18:07:55,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 18:07:55,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:55,936 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:55,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 18:07:55,936 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:07:55,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:55,937 INFO L85 PathProgramCache]: Analyzing trace with hash 84699063, now seen corresponding path program 1 times [2021-12-21 18:07:55,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:07:55,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309135803] [2021-12-21 18:07:55,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:55,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:07:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:55,965 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 18:07:55,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:07:55,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309135803] [2021-12-21 18:07:55,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309135803] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:55,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:55,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:07:55,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037077916] [2021-12-21 18:07:55,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:55,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:07:55,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:07:55,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:07:55,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:07:55,968 INFO L87 Difference]: Start difference. First operand 326 states and 465 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:07:55,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:55,987 INFO L93 Difference]: Finished difference Result 467 states and 621 transitions. [2021-12-21 18:07:55,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:07:55,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-21 18:07:55,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:55,990 INFO L225 Difference]: With dead ends: 467 [2021-12-21 18:07:55,990 INFO L226 Difference]: Without dead ends: 467 [2021-12-21 18:07:55,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:07:55,991 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 167 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:55,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 384 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:07:55,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-12-21 18:07:55,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 328. [2021-12-21 18:07:55,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 249 states have (on average 1.8032128514056225) internal successors, (449), 317 states have internal predecessors, (449), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-21 18:07:56,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 465 transitions. [2021-12-21 18:07:56,001 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 465 transitions. Word has length 11 [2021-12-21 18:07:56,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:56,001 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 465 transitions. [2021-12-21 18:07:56,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:07:56,002 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 465 transitions. [2021-12-21 18:07:56,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 18:07:56,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:56,002 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:56,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 18:07:56,003 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:07:56,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:56,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1669297564, now seen corresponding path program 1 times [2021-12-21 18:07:56,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:07:56,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656277700] [2021-12-21 18:07:56,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:56,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:07:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:56,025 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 18:07:56,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:07:56,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656277700] [2021-12-21 18:07:56,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656277700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:56,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:56,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:07:56,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369187411] [2021-12-21 18:07:56,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:56,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:07:56,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:07:56,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:07:56,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:07:56,031 INFO L87 Difference]: Start difference. First operand 328 states and 465 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:07:56,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:56,138 INFO L93 Difference]: Finished difference Result 383 states and 518 transitions. [2021-12-21 18:07:56,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:07:56,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-21 18:07:56,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:56,142 INFO L225 Difference]: With dead ends: 383 [2021-12-21 18:07:56,142 INFO L226 Difference]: Without dead ends: 376 [2021-12-21 18:07:56,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:07:56,143 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 77 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:56,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 299 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:07:56,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-12-21 18:07:56,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 325. [2021-12-21 18:07:56,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 246 states have (on average 1.8048780487804879) internal successors, (444), 314 states have internal predecessors, (444), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-21 18:07:56,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 460 transitions. [2021-12-21 18:07:56,152 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 460 transitions. Word has length 12 [2021-12-21 18:07:56,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:56,152 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 460 transitions. [2021-12-21 18:07:56,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 18:07:56,153 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 460 transitions. [2021-12-21 18:07:56,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 18:07:56,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:56,154 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:56,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 18:07:56,154 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:07:56,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:56,155 INFO L85 PathProgramCache]: Analyzing trace with hash 79488163, now seen corresponding path program 1 times [2021-12-21 18:07:56,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:07:56,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631389508] [2021-12-21 18:07:56,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:56,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:07:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:56,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 18:07:56,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:56,183 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 18:07:56,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:07:56,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631389508] [2021-12-21 18:07:56,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631389508] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:56,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:56,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:07:56,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831831822] [2021-12-21 18:07:56,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:56,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:07:56,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:07:56,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:07:56,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:07:56,186 INFO L87 Difference]: Start difference. First operand 325 states and 460 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:07:56,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:56,208 INFO L93 Difference]: Finished difference Result 527 states and 732 transitions. [2021-12-21 18:07:56,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:07:56,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-21 18:07:56,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:56,211 INFO L225 Difference]: With dead ends: 527 [2021-12-21 18:07:56,212 INFO L226 Difference]: Without dead ends: 527 [2021-12-21 18:07:56,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:07:56,213 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 181 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:56,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 552 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:07:56,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-12-21 18:07:56,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 329. [2021-12-21 18:07:56,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 250 states have (on average 1.784) internal successors, (446), 318 states have internal predecessors, (446), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-21 18:07:56,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 462 transitions. [2021-12-21 18:07:56,223 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 462 transitions. Word has length 17 [2021-12-21 18:07:56,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:56,224 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 462 transitions. [2021-12-21 18:07:56,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:07:56,224 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 462 transitions. [2021-12-21 18:07:56,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 18:07:56,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:56,225 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:56,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 18:07:56,225 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:07:56,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:56,226 INFO L85 PathProgramCache]: Analyzing trace with hash -621576415, now seen corresponding path program 1 times [2021-12-21 18:07:56,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:07:56,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6866078] [2021-12-21 18:07:56,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:56,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:07:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:56,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 18:07:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:56,259 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 18:07:56,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:07:56,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6866078] [2021-12-21 18:07:56,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6866078] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:56,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:56,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:07:56,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054925285] [2021-12-21 18:07:56,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:56,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:07:56,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:07:56,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:07:56,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:07:56,261 INFO L87 Difference]: Start difference. First operand 329 states and 462 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:07:56,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:56,270 INFO L93 Difference]: Finished difference Result 333 states and 466 transitions. [2021-12-21 18:07:56,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:07:56,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-21 18:07:56,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:56,272 INFO L225 Difference]: With dead ends: 333 [2021-12-21 18:07:56,272 INFO L226 Difference]: Without dead ends: 333 [2021-12-21 18:07:56,272 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 18:07:56,273 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 0 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:56,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 385 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:07:56,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-12-21 18:07:56,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2021-12-21 18:07:56,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 254 states have (on average 1.7716535433070866) internal successors, (450), 322 states have internal predecessors, (450), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-21 18:07:56,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 466 transitions. [2021-12-21 18:07:56,281 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 466 transitions. Word has length 17 [2021-12-21 18:07:56,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:56,282 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 466 transitions. [2021-12-21 18:07:56,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:07:56,282 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 466 transitions. [2021-12-21 18:07:56,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 18:07:56,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:56,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:56,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 18:07:56,283 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:07:56,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:56,284 INFO L85 PathProgramCache]: Analyzing trace with hash 187770211, now seen corresponding path program 1 times [2021-12-21 18:07:56,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:07:56,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648019181] [2021-12-21 18:07:56,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:56,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:07:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:56,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 18:07:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:56,332 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 18:07:56,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:07:56,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648019181] [2021-12-21 18:07:56,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648019181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:56,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:56,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:07:56,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699481317] [2021-12-21 18:07:56,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:56,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:07:56,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:07:56,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:07:56,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:07:56,335 INFO L87 Difference]: Start difference. First operand 333 states and 466 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:07:56,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:56,564 INFO L93 Difference]: Finished difference Result 566 states and 714 transitions. [2021-12-21 18:07:56,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:07:56,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-21 18:07:56,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:56,567 INFO L225 Difference]: With dead ends: 566 [2021-12-21 18:07:56,567 INFO L226 Difference]: Without dead ends: 566 [2021-12-21 18:07:56,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:07:56,568 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 340 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:56,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 458 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:07:56,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-12-21 18:07:56,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 339. [2021-12-21 18:07:56,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 260 states have (on average 1.7538461538461538) internal successors, (456), 328 states have internal predecessors, (456), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-21 18:07:56,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 472 transitions. [2021-12-21 18:07:56,579 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 472 transitions. Word has length 17 [2021-12-21 18:07:56,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:56,591 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 472 transitions. [2021-12-21 18:07:56,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:07:56,592 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 472 transitions. [2021-12-21 18:07:56,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 18:07:56,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:56,594 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:56,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 18:07:56,595 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:07:56,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:56,596 INFO L85 PathProgramCache]: Analyzing trace with hash 187770212, now seen corresponding path program 1 times [2021-12-21 18:07:56,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:07:56,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396438712] [2021-12-21 18:07:56,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:56,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:07:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:56,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 18:07:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:56,669 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 18:07:56,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:07:56,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396438712] [2021-12-21 18:07:56,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396438712] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:56,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:56,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:07:56,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826535691] [2021-12-21 18:07:56,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:56,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:07:56,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:07:56,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:07:56,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:07:56,673 INFO L87 Difference]: Start difference. First operand 339 states and 472 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:07:56,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:56,828 INFO L93 Difference]: Finished difference Result 386 states and 491 transitions. [2021-12-21 18:07:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:07:56,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-21 18:07:56,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:56,830 INFO L225 Difference]: With dead ends: 386 [2021-12-21 18:07:56,830 INFO L226 Difference]: Without dead ends: 386 [2021-12-21 18:07:56,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:07:56,831 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 184 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:56,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 460 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:07:56,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-12-21 18:07:56,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 339. [2021-12-21 18:07:56,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 260 states have (on average 1.7307692307692308) internal successors, (450), 328 states have internal predecessors, (450), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-21 18:07:56,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 466 transitions. [2021-12-21 18:07:56,838 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 466 transitions. Word has length 17 [2021-12-21 18:07:56,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:56,838 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 466 transitions. [2021-12-21 18:07:56,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:07:56,839 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 466 transitions. [2021-12-21 18:07:56,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 18:07:56,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:56,842 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:56,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 18:07:56,842 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:07:56,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:56,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1574138016, now seen corresponding path program 1 times [2021-12-21 18:07:56,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:07:56,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378073007] [2021-12-21 18:07:56,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:56,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:07:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:56,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:07:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:56,914 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 18:07:56,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:07:56,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378073007] [2021-12-21 18:07:56,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378073007] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:56,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:56,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:07:56,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734113227] [2021-12-21 18:07:56,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:56,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:07:56,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:07:56,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:07:56,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:07:56,917 INFO L87 Difference]: Start difference. First operand 339 states and 466 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:07:57,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:57,238 INFO L93 Difference]: Finished difference Result 704 states and 839 transitions. [2021-12-21 18:07:57,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:07:57,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-21 18:07:57,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:57,241 INFO L225 Difference]: With dead ends: 704 [2021-12-21 18:07:57,242 INFO L226 Difference]: Without dead ends: 704 [2021-12-21 18:07:57,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:07:57,242 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 894 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:57,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 562 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 18:07:57,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-12-21 18:07:57,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 336. [2021-12-21 18:07:57,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 261 states have (on average 1.7011494252873562) internal successors, (444), 325 states have internal predecessors, (444), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-21 18:07:57,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 460 transitions. [2021-12-21 18:07:57,253 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 460 transitions. Word has length 18 [2021-12-21 18:07:57,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:57,254 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 460 transitions. [2021-12-21 18:07:57,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:07:57,254 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 460 transitions. [2021-12-21 18:07:57,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 18:07:57,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:57,255 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:57,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 18:07:57,255 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:07:57,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:57,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1574138017, now seen corresponding path program 1 times [2021-12-21 18:07:57,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:07:57,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343612917] [2021-12-21 18:07:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:57,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:07:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:57,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:07:57,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:57,369 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 18:07:57,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:07:57,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343612917] [2021-12-21 18:07:57,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343612917] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:57,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:57,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:07:57,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634145006] [2021-12-21 18:07:57,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:57,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:07:57,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:07:57,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:07:57,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:07:57,373 INFO L87 Difference]: Start difference. First operand 336 states and 460 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:07:57,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:57,904 INFO L93 Difference]: Finished difference Result 686 states and 840 transitions. [2021-12-21 18:07:57,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 18:07:57,904 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-21 18:07:57,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:57,907 INFO L225 Difference]: With dead ends: 686 [2021-12-21 18:07:57,907 INFO L226 Difference]: Without dead ends: 686 [2021-12-21 18:07:57,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:07:57,908 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 640 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:57,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [644 Valid, 741 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 18:07:57,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-12-21 18:07:57,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 356. [2021-12-21 18:07:57,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 281 states have (on average 1.704626334519573) internal successors, (479), 345 states have internal predecessors, (479), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-21 18:07:57,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 495 transitions. [2021-12-21 18:07:57,919 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 495 transitions. Word has length 18 [2021-12-21 18:07:57,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:57,919 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 495 transitions. [2021-12-21 18:07:57,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:07:57,920 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 495 transitions. [2021-12-21 18:07:57,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 18:07:57,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:57,920 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:57,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 18:07:57,921 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:07:57,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:57,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1870398950, now seen corresponding path program 1 times [2021-12-21 18:07:57,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:07:57,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826682214] [2021-12-21 18:07:57,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:57,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:07:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:58,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:07:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:58,115 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 18:07:58,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:07:58,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826682214] [2021-12-21 18:07:58,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826682214] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:58,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:58,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 18:07:58,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426551737] [2021-12-21 18:07:58,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:58,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:07:58,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:07:58,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:07:58,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:07:58,118 INFO L87 Difference]: Start difference. First operand 356 states and 495 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:07:58,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:58,421 INFO L93 Difference]: Finished difference Result 544 states and 724 transitions. [2021-12-21 18:07:58,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 18:07:58,422 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-12-21 18:07:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:58,424 INFO L225 Difference]: With dead ends: 544 [2021-12-21 18:07:58,424 INFO L226 Difference]: Without dead ends: 544 [2021-12-21 18:07:58,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-12-21 18:07:58,425 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 202 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:58,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 988 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:07:58,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-12-21 18:07:58,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 415. [2021-12-21 18:07:58,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 337 states have (on average 1.6706231454005935) internal successors, (563), 400 states have internal predecessors, (563), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-21 18:07:58,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 583 transitions. [2021-12-21 18:07:58,434 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 583 transitions. Word has length 22 [2021-12-21 18:07:58,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:58,435 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 583 transitions. [2021-12-21 18:07:58,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:07:58,435 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 583 transitions. [2021-12-21 18:07:58,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 18:07:58,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:58,436 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:58,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 18:07:58,436 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:07:58,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:58,437 INFO L85 PathProgramCache]: Analyzing trace with hash -189481273, now seen corresponding path program 1 times [2021-12-21 18:07:58,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:07:58,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702242963] [2021-12-21 18:07:58,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:58,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:07:58,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:58,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 18:07:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:58,693 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 18:07:58,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:07:58,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702242963] [2021-12-21 18:07:58,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702242963] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:58,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:58,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 18:07:58,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442232317] [2021-12-21 18:07:58,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:58,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 18:07:58,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:07:58,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 18:07:58,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-21 18:07:58,695 INFO L87 Difference]: Start difference. First operand 415 states and 583 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:07:59,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:59,322 INFO L93 Difference]: Finished difference Result 766 states and 1047 transitions. [2021-12-21 18:07:59,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 18:07:59,323 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-12-21 18:07:59,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:59,325 INFO L225 Difference]: With dead ends: 766 [2021-12-21 18:07:59,325 INFO L226 Difference]: Without dead ends: 764 [2021-12-21 18:07:59,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-12-21 18:07:59,326 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 549 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 1684 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:59,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 1684 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 18:07:59,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-12-21 18:07:59,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 409. [2021-12-21 18:07:59,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 331 states have (on average 1.6676737160120847) internal successors, (552), 394 states have internal predecessors, (552), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-21 18:07:59,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 572 transitions. [2021-12-21 18:07:59,337 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 572 transitions. Word has length 23 [2021-12-21 18:07:59,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:59,338 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 572 transitions. [2021-12-21 18:07:59,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:07:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 572 transitions. [2021-12-21 18:07:59,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 18:07:59,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:59,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:59,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 18:07:59,339 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:07:59,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:59,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1937391848, now seen corresponding path program 1 times [2021-12-21 18:07:59,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:07:59,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365524220] [2021-12-21 18:07:59,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:59,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:07:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:59,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:07:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:59,401 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 18:07:59,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:07:59,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365524220] [2021-12-21 18:07:59,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365524220] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:59,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:59,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 18:07:59,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068883886] [2021-12-21 18:07:59,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:59,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:07:59,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:07:59,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:07:59,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:07:59,405 INFO L87 Difference]: Start difference. First operand 409 states and 572 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:07:59,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:59,433 INFO L93 Difference]: Finished difference Result 442 states and 575 transitions. [2021-12-21 18:07:59,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:07:59,434 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-12-21 18:07:59,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:59,437 INFO L225 Difference]: With dead ends: 442 [2021-12-21 18:07:59,437 INFO L226 Difference]: Without dead ends: 442 [2021-12-21 18:07:59,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:07:59,438 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 252 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:59,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 1135 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:07:59,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-12-21 18:07:59,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 409. [2021-12-21 18:07:59,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 331 states have (on average 1.661631419939577) internal successors, (550), 394 states have internal predecessors, (550), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-21 18:07:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 570 transitions. [2021-12-21 18:07:59,450 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 570 transitions. Word has length 23 [2021-12-21 18:07:59,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:59,452 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 570 transitions. [2021-12-21 18:07:59,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:07:59,452 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 570 transitions. [2021-12-21 18:07:59,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 18:07:59,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:59,455 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:59,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 18:07:59,455 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:07:59,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:59,456 INFO L85 PathProgramCache]: Analyzing trace with hash -582568086, now seen corresponding path program 1 times [2021-12-21 18:07:59,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:07:59,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295706653] [2021-12-21 18:07:59,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:59,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:07:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:59,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:07:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:59,533 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 18:07:59,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:07:59,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295706653] [2021-12-21 18:07:59,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295706653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:59,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:59,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 18:07:59,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409338117] [2021-12-21 18:07:59,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:59,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:07:59,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:07:59,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:07:59,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:07:59,537 INFO L87 Difference]: Start difference. First operand 409 states and 570 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:07:59,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:59,575 INFO L93 Difference]: Finished difference Result 438 states and 567 transitions. [2021-12-21 18:07:59,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:07:59,576 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-12-21 18:07:59,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:59,578 INFO L225 Difference]: With dead ends: 438 [2021-12-21 18:07:59,578 INFO L226 Difference]: Without dead ends: 438 [2021-12-21 18:07:59,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:07:59,579 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 249 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:59,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 1131 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:07:59,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-12-21 18:07:59,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 407. [2021-12-21 18:07:59,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 329 states have (on average 1.6534954407294833) internal successors, (544), 392 states have internal predecessors, (544), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-21 18:07:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 564 transitions. [2021-12-21 18:07:59,588 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 564 transitions. Word has length 23 [2021-12-21 18:07:59,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:59,589 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 564 transitions. [2021-12-21 18:07:59,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:07:59,589 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 564 transitions. [2021-12-21 18:07:59,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-21 18:07:59,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:59,590 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:59,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 18:07:59,590 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:07:59,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:59,591 INFO L85 PathProgramCache]: Analyzing trace with hash -2129210531, now seen corresponding path program 1 times [2021-12-21 18:07:59,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:07:59,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003547455] [2021-12-21 18:07:59,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:59,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:07:59,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:59,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:07:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:59,631 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 18:07:59,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:07:59,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003547455] [2021-12-21 18:07:59,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003547455] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:59,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:59,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:07:59,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083683151] [2021-12-21 18:07:59,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:59,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:07:59,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:07:59,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:07:59,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:07:59,634 INFO L87 Difference]: Start difference. First operand 407 states and 564 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:07:59,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:59,729 INFO L93 Difference]: Finished difference Result 499 states and 664 transitions. [2021-12-21 18:07:59,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:07:59,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-12-21 18:07:59,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:59,732 INFO L225 Difference]: With dead ends: 499 [2021-12-21 18:07:59,732 INFO L226 Difference]: Without dead ends: 499 [2021-12-21 18:07:59,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 18:07:59,732 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 156 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:59,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 291 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:07:59,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-12-21 18:07:59,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 404. [2021-12-21 18:07:59,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 329 states have (on average 1.6261398176291793) internal successors, (535), 389 states have internal predecessors, (535), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-21 18:07:59,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 555 transitions. [2021-12-21 18:07:59,741 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 555 transitions. Word has length 24 [2021-12-21 18:07:59,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:59,741 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 555 transitions. [2021-12-21 18:07:59,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:07:59,742 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 555 transitions. [2021-12-21 18:07:59,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-21 18:07:59,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:59,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:59,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 18:07:59,743 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:07:59,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:59,743 INFO L85 PathProgramCache]: Analyzing trace with hash -2129210530, now seen corresponding path program 1 times [2021-12-21 18:07:59,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:07:59,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020495947] [2021-12-21 18:07:59,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:59,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:07:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:59,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:07:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:59,792 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 18:07:59,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:07:59,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020495947] [2021-12-21 18:07:59,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020495947] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:59,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:59,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:07:59,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969249489] [2021-12-21 18:07:59,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:59,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:07:59,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:07:59,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:07:59,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:07:59,795 INFO L87 Difference]: Start difference. First operand 404 states and 555 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:07:59,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:07:59,879 INFO L93 Difference]: Finished difference Result 433 states and 552 transitions. [2021-12-21 18:07:59,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:07:59,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-12-21 18:07:59,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:07:59,881 INFO L225 Difference]: With dead ends: 433 [2021-12-21 18:07:59,882 INFO L226 Difference]: Without dead ends: 433 [2021-12-21 18:07:59,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:07:59,882 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 173 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:07:59,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 382 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:07:59,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-12-21 18:07:59,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 402. [2021-12-21 18:07:59,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 329 states have (on average 1.6079027355623101) internal successors, (529), 387 states have internal predecessors, (529), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-21 18:07:59,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 549 transitions. [2021-12-21 18:07:59,891 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 549 transitions. Word has length 24 [2021-12-21 18:07:59,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:07:59,891 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 549 transitions. [2021-12-21 18:07:59,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:07:59,892 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 549 transitions. [2021-12-21 18:07:59,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-21 18:07:59,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:07:59,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:07:59,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 18:07:59,893 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:07:59,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:07:59,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1695234990, now seen corresponding path program 1 times [2021-12-21 18:07:59,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:07:59,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111208407] [2021-12-21 18:07:59,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:07:59,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:07:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:59,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 18:07:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:07:59,934 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 18:07:59,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:07:59,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111208407] [2021-12-21 18:07:59,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111208407] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:07:59,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:07:59,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:07:59,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089882518] [2021-12-21 18:07:59,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:07:59,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:07:59,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:07:59,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:07:59,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:07:59,936 INFO L87 Difference]: Start difference. First operand 402 states and 549 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:00,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:00,120 INFO L93 Difference]: Finished difference Result 635 states and 810 transitions. [2021-12-21 18:08:00,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:08:00,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-21 18:08:00,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:00,123 INFO L225 Difference]: With dead ends: 635 [2021-12-21 18:08:00,124 INFO L226 Difference]: Without dead ends: 635 [2021-12-21 18:08:00,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:08:00,125 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 298 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:00,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 446 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:08:00,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-12-21 18:08:00,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 430. [2021-12-21 18:08:00,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 357 states have (on average 1.6274509803921569) internal successors, (581), 415 states have internal predecessors, (581), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-21 18:08:00,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 601 transitions. [2021-12-21 18:08:00,139 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 601 transitions. Word has length 25 [2021-12-21 18:08:00,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:00,141 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 601 transitions. [2021-12-21 18:08:00,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:00,141 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 601 transitions. [2021-12-21 18:08:00,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-21 18:08:00,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:00,142 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:00,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 18:08:00,142 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:00,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:00,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1695234989, now seen corresponding path program 1 times [2021-12-21 18:08:00,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:00,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950739262] [2021-12-21 18:08:00,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:00,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:00,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 18:08:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:00,288 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 18:08:00,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:00,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950739262] [2021-12-21 18:08:00,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950739262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:00,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:00,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:08:00,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076916136] [2021-12-21 18:08:00,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:00,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:08:00,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:00,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:08:00,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:08:00,292 INFO L87 Difference]: Start difference. First operand 430 states and 601 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:00,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:00,544 INFO L93 Difference]: Finished difference Result 473 states and 616 transitions. [2021-12-21 18:08:00,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:08:00,544 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-21 18:08:00,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:00,546 INFO L225 Difference]: With dead ends: 473 [2021-12-21 18:08:00,546 INFO L226 Difference]: Without dead ends: 473 [2021-12-21 18:08:00,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-21 18:08:00,547 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 258 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:00,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 651 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:08:00,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-12-21 18:08:00,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 430. [2021-12-21 18:08:00,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 357 states have (on average 1.6022408963585435) internal successors, (572), 415 states have internal predecessors, (572), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-21 18:08:00,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 592 transitions. [2021-12-21 18:08:00,556 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 592 transitions. Word has length 25 [2021-12-21 18:08:00,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:00,557 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 592 transitions. [2021-12-21 18:08:00,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:00,557 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 592 transitions. [2021-12-21 18:08:00,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-21 18:08:00,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:00,558 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:00,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 18:08:00,558 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:00,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:00,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1766884672, now seen corresponding path program 1 times [2021-12-21 18:08:00,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:00,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816191180] [2021-12-21 18:08:00,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:00,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:00,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:00,605 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 18:08:00,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:00,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816191180] [2021-12-21 18:08:00,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816191180] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:00,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:00,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:08:00,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522708230] [2021-12-21 18:08:00,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:00,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:08:00,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:00,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:08:00,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:08:00,608 INFO L87 Difference]: Start difference. First operand 430 states and 592 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:00,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:00,694 INFO L93 Difference]: Finished difference Result 457 states and 592 transitions. [2021-12-21 18:08:00,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:08:00,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-12-21 18:08:00,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:00,706 INFO L225 Difference]: With dead ends: 457 [2021-12-21 18:08:00,706 INFO L226 Difference]: Without dead ends: 457 [2021-12-21 18:08:00,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:08:00,708 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 334 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:00,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 298 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:08:00,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-12-21 18:08:00,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 429. [2021-12-21 18:08:00,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 357 states have (on average 1.5938375350140057) internal successors, (569), 414 states have internal predecessors, (569), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-21 18:08:00,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 589 transitions. [2021-12-21 18:08:00,720 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 589 transitions. Word has length 26 [2021-12-21 18:08:00,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:00,720 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 589 transitions. [2021-12-21 18:08:00,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:00,721 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 589 transitions. [2021-12-21 18:08:00,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-21 18:08:00,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:00,722 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:00,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 18:08:00,722 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:00,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:00,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1766884865, now seen corresponding path program 1 times [2021-12-21 18:08:00,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:00,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298000089] [2021-12-21 18:08:00,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:00,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:00,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:00,790 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 18:08:00,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:00,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298000089] [2021-12-21 18:08:00,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298000089] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:00,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:00,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 18:08:00,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588586132] [2021-12-21 18:08:00,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:00,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 18:08:00,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:00,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 18:08:00,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:08:00,792 INFO L87 Difference]: Start difference. First operand 429 states and 589 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:00,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:00,974 INFO L93 Difference]: Finished difference Result 649 states and 872 transitions. [2021-12-21 18:08:00,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 18:08:00,976 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-12-21 18:08:00,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:00,978 INFO L225 Difference]: With dead ends: 649 [2021-12-21 18:08:00,978 INFO L226 Difference]: Without dead ends: 649 [2021-12-21 18:08:00,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-21 18:08:00,979 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 160 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:00,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 1315 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:08:00,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-12-21 18:08:00,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 459. [2021-12-21 18:08:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 387 states have (on average 1.5607235142118863) internal successors, (604), 444 states have internal predecessors, (604), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-21 18:08:00,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 624 transitions. [2021-12-21 18:08:00,988 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 624 transitions. Word has length 26 [2021-12-21 18:08:00,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:00,989 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 624 transitions. [2021-12-21 18:08:00,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:00,989 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 624 transitions. [2021-12-21 18:08:00,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 18:08:00,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:00,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:00,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 18:08:00,990 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:00,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:00,991 INFO L85 PathProgramCache]: Analyzing trace with hash -808600231, now seen corresponding path program 1 times [2021-12-21 18:08:00,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:00,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206222433] [2021-12-21 18:08:00,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:00,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:01,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 18:08:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:01,051 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 18:08:01,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:01,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206222433] [2021-12-21 18:08:01,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206222433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:01,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:01,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:08:01,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021584051] [2021-12-21 18:08:01,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:01,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:08:01,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:01,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:08:01,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:08:01,054 INFO L87 Difference]: Start difference. First operand 459 states and 624 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:01,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:01,196 INFO L93 Difference]: Finished difference Result 530 states and 691 transitions. [2021-12-21 18:08:01,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:08:01,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-12-21 18:08:01,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:01,199 INFO L225 Difference]: With dead ends: 530 [2021-12-21 18:08:01,199 INFO L226 Difference]: Without dead ends: 530 [2021-12-21 18:08:01,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:08:01,199 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 168 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:01,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 676 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:08:01,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-12-21 18:08:01,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 459. [2021-12-21 18:08:01,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 387 states have (on average 1.558139534883721) internal successors, (603), 444 states have internal predecessors, (603), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-21 18:08:01,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 623 transitions. [2021-12-21 18:08:01,208 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 623 transitions. Word has length 29 [2021-12-21 18:08:01,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:01,208 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 623 transitions. [2021-12-21 18:08:01,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:01,209 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 623 transitions. [2021-12-21 18:08:01,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 18:08:01,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:01,209 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:01,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 18:08:01,210 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:01,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:01,210 INFO L85 PathProgramCache]: Analyzing trace with hash 703196873, now seen corresponding path program 1 times [2021-12-21 18:08:01,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:01,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823184423] [2021-12-21 18:08:01,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:01,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:01,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 18:08:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:01,300 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 18:08:01,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:01,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823184423] [2021-12-21 18:08:01,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823184423] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:01,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:01,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:08:01,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218109679] [2021-12-21 18:08:01,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:01,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:08:01,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:01,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:08:01,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:08:01,302 INFO L87 Difference]: Start difference. First operand 459 states and 623 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:01,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:01,476 INFO L93 Difference]: Finished difference Result 595 states and 780 transitions. [2021-12-21 18:08:01,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:08:01,477 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-21 18:08:01,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:01,479 INFO L225 Difference]: With dead ends: 595 [2021-12-21 18:08:01,479 INFO L226 Difference]: Without dead ends: 595 [2021-12-21 18:08:01,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:08:01,480 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 199 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:01,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 667 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:08:01,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-12-21 18:08:01,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 500. [2021-12-21 18:08:01,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 425 states have (on average 1.5482352941176472) internal successors, (658), 483 states have internal predecessors, (658), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-21 18:08:01,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 682 transitions. [2021-12-21 18:08:01,489 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 682 transitions. Word has length 30 [2021-12-21 18:08:01,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:01,490 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 682 transitions. [2021-12-21 18:08:01,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:01,490 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 682 transitions. [2021-12-21 18:08:01,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-21 18:08:01,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:01,491 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:01,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-21 18:08:01,491 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:01,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:01,491 INFO L85 PathProgramCache]: Analyzing trace with hash 2144668882, now seen corresponding path program 1 times [2021-12-21 18:08:01,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:01,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861919708] [2021-12-21 18:08:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:01,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:01,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:01,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 18:08:01,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:01,577 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 18:08:01,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:01,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861919708] [2021-12-21 18:08:01,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861919708] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:01,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:01,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 18:08:01,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109957310] [2021-12-21 18:08:01,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:01,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 18:08:01,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:01,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 18:08:01,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:08:01,581 INFO L87 Difference]: Start difference. First operand 500 states and 682 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:01,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:01,833 INFO L93 Difference]: Finished difference Result 855 states and 1109 transitions. [2021-12-21 18:08:01,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 18:08:01,834 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-12-21 18:08:01,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:01,837 INFO L225 Difference]: With dead ends: 855 [2021-12-21 18:08:01,837 INFO L226 Difference]: Without dead ends: 855 [2021-12-21 18:08:01,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-21 18:08:01,838 INFO L933 BasicCegarLoop]: 337 mSDtfsCounter, 514 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:01,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 1525 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:08:01,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-12-21 18:08:01,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 497. [2021-12-21 18:08:01,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 425 states have (on average 1.5058823529411764) internal successors, (640), 480 states have internal predecessors, (640), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-21 18:08:01,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 664 transitions. [2021-12-21 18:08:01,850 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 664 transitions. Word has length 32 [2021-12-21 18:08:01,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:01,851 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 664 transitions. [2021-12-21 18:08:01,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:01,851 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 664 transitions. [2021-12-21 18:08:01,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-21 18:08:01,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:01,852 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:01,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-21 18:08:01,852 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:01,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:01,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1462337803, now seen corresponding path program 1 times [2021-12-21 18:08:01,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:01,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521109321] [2021-12-21 18:08:01,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:01,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:01,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 18:08:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:01,954 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 18:08:01,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:01,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521109321] [2021-12-21 18:08:01,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521109321] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:01,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:01,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:08:01,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815595404] [2021-12-21 18:08:01,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:01,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:08:01,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:01,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:08:01,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:08:01,957 INFO L87 Difference]: Start difference. First operand 497 states and 664 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:02,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:02,417 INFO L93 Difference]: Finished difference Result 877 states and 1128 transitions. [2021-12-21 18:08:02,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 18:08:02,418 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-12-21 18:08:02,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:02,420 INFO L225 Difference]: With dead ends: 877 [2021-12-21 18:08:02,421 INFO L226 Difference]: Without dead ends: 877 [2021-12-21 18:08:02,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:08:02,421 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 428 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:02,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 1076 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 18:08:02,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-12-21 18:08:02,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 534. [2021-12-21 18:08:02,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 459 states have (on average 1.4880174291938997) internal successors, (683), 515 states have internal predecessors, (683), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-21 18:08:02,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 711 transitions. [2021-12-21 18:08:02,432 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 711 transitions. Word has length 32 [2021-12-21 18:08:02,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:02,433 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 711 transitions. [2021-12-21 18:08:02,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:02,433 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 711 transitions. [2021-12-21 18:08:02,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-21 18:08:02,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:02,442 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:02,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-21 18:08:02,443 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:02,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:02,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1912168099, now seen corresponding path program 1 times [2021-12-21 18:08:02,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:02,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053458083] [2021-12-21 18:08:02,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:02,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:02,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:02,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 18:08:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:02,576 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 18:08:02,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:02,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053458083] [2021-12-21 18:08:02,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053458083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:02,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:02,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 18:08:02,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497405916] [2021-12-21 18:08:02,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:02,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 18:08:02,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:02,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 18:08:02,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:08:02,579 INFO L87 Difference]: Start difference. First operand 534 states and 711 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:03,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:03,008 INFO L93 Difference]: Finished difference Result 667 states and 839 transitions. [2021-12-21 18:08:03,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 18:08:03,009 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-12-21 18:08:03,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:03,011 INFO L225 Difference]: With dead ends: 667 [2021-12-21 18:08:03,011 INFO L226 Difference]: Without dead ends: 667 [2021-12-21 18:08:03,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-21 18:08:03,012 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 388 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:03,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 809 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 18:08:03,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-12-21 18:08:03,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 534. [2021-12-21 18:08:03,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 459 states have (on average 1.4793028322440087) internal successors, (679), 515 states have internal predecessors, (679), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-21 18:08:03,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 707 transitions. [2021-12-21 18:08:03,023 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 707 transitions. Word has length 33 [2021-12-21 18:08:03,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:03,023 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 707 transitions. [2021-12-21 18:08:03,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:03,023 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 707 transitions. [2021-12-21 18:08:03,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 18:08:03,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:03,024 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:03,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-21 18:08:03,024 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:03,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:03,025 INFO L85 PathProgramCache]: Analyzing trace with hash -557500014, now seen corresponding path program 1 times [2021-12-21 18:08:03,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:03,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137860462] [2021-12-21 18:08:03,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:03,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:03,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:03,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 18:08:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:03,161 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 18:08:03,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:03,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137860462] [2021-12-21 18:08:03,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137860462] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:03,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:03,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 18:08:03,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121462722] [2021-12-21 18:08:03,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:03,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:08:03,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:03,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:08:03,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:08:03,164 INFO L87 Difference]: Start difference. First operand 534 states and 707 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:03,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:03,363 INFO L93 Difference]: Finished difference Result 579 states and 753 transitions. [2021-12-21 18:08:03,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:08:03,366 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-12-21 18:08:03,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:03,368 INFO L225 Difference]: With dead ends: 579 [2021-12-21 18:08:03,368 INFO L226 Difference]: Without dead ends: 579 [2021-12-21 18:08:03,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 18:08:03,369 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 111 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:03,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 851 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:08:03,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-12-21 18:08:03,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 534. [2021-12-21 18:08:03,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 459 states have (on average 1.477124183006536) internal successors, (678), 515 states have internal predecessors, (678), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-21 18:08:03,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 706 transitions. [2021-12-21 18:08:03,381 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 706 transitions. Word has length 34 [2021-12-21 18:08:03,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:03,381 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 706 transitions. [2021-12-21 18:08:03,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:03,382 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 706 transitions. [2021-12-21 18:08:03,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 18:08:03,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:03,382 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:03,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-21 18:08:03,383 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:03,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:03,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1394937876, now seen corresponding path program 1 times [2021-12-21 18:08:03,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:03,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851533154] [2021-12-21 18:08:03,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:03,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:03,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:03,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:03,438 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 18:08:03,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:03,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851533154] [2021-12-21 18:08:03,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851533154] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:03,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:03,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:08:03,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146646417] [2021-12-21 18:08:03,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:03,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:08:03,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:03,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:08:03,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:08:03,441 INFO L87 Difference]: Start difference. First operand 534 states and 706 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:03,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:03,622 INFO L93 Difference]: Finished difference Result 625 states and 808 transitions. [2021-12-21 18:08:03,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:08:03,622 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-12-21 18:08:03,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:03,625 INFO L225 Difference]: With dead ends: 625 [2021-12-21 18:08:03,625 INFO L226 Difference]: Without dead ends: 625 [2021-12-21 18:08:03,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 18:08:03,625 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 493 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:03,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 579 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:08:03,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-12-21 18:08:03,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 533. [2021-12-21 18:08:03,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 459 states have (on average 1.4727668845315904) internal successors, (676), 514 states have internal predecessors, (676), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-21 18:08:03,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 704 transitions. [2021-12-21 18:08:03,638 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 704 transitions. Word has length 34 [2021-12-21 18:08:03,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:03,638 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 704 transitions. [2021-12-21 18:08:03,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:03,638 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 704 transitions. [2021-12-21 18:08:03,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 18:08:03,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:03,639 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:03,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-21 18:08:03,639 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:03,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:03,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1394937875, now seen corresponding path program 1 times [2021-12-21 18:08:03,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:03,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646853241] [2021-12-21 18:08:03,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:03,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:03,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:03,713 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 18:08:03,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:03,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646853241] [2021-12-21 18:08:03,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646853241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:03,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:03,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:08:03,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024438896] [2021-12-21 18:08:03,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:03,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:08:03,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:03,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:08:03,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:08:03,716 INFO L87 Difference]: Start difference. First operand 533 states and 704 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:03,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:03,872 INFO L93 Difference]: Finished difference Result 557 states and 705 transitions. [2021-12-21 18:08:03,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:08:03,874 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-12-21 18:08:03,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:03,875 INFO L225 Difference]: With dead ends: 557 [2021-12-21 18:08:03,876 INFO L226 Difference]: Without dead ends: 557 [2021-12-21 18:08:03,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 18:08:03,876 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 523 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:03,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 592 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:08:03,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-12-21 18:08:03,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 532. [2021-12-21 18:08:03,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 459 states have (on average 1.4684095860566448) internal successors, (674), 513 states have internal predecessors, (674), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-21 18:08:03,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 702 transitions. [2021-12-21 18:08:03,885 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 702 transitions. Word has length 34 [2021-12-21 18:08:03,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:03,885 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 702 transitions. [2021-12-21 18:08:03,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:03,886 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 702 transitions. [2021-12-21 18:08:03,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-21 18:08:03,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:03,886 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:03,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-21 18:08:03,887 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:03,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:03,887 INFO L85 PathProgramCache]: Analyzing trace with hash -505498803, now seen corresponding path program 1 times [2021-12-21 18:08:03,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:03,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729466452] [2021-12-21 18:08:03,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:03,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:03,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:03,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:03,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:03,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729466452] [2021-12-21 18:08:03,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729466452] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:03,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:03,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:08:03,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327267762] [2021-12-21 18:08:03,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:03,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:08:03,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:03,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:08:03,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:08:03,933 INFO L87 Difference]: Start difference. First operand 532 states and 702 transitions. Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:04,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:04,128 INFO L93 Difference]: Finished difference Result 926 states and 1168 transitions. [2021-12-21 18:08:04,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:08:04,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-12-21 18:08:04,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:04,131 INFO L225 Difference]: With dead ends: 926 [2021-12-21 18:08:04,131 INFO L226 Difference]: Without dead ends: 926 [2021-12-21 18:08:04,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:08:04,132 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 594 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:04,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 575 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:08:04,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-12-21 18:08:04,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 529. [2021-12-21 18:08:04,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 459 states have (on average 1.4553376906318083) internal successors, (668), 510 states have internal predecessors, (668), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-21 18:08:04,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 696 transitions. [2021-12-21 18:08:04,169 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 696 transitions. Word has length 36 [2021-12-21 18:08:04,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:04,169 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 696 transitions. [2021-12-21 18:08:04,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:04,170 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 696 transitions. [2021-12-21 18:08:04,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-21 18:08:04,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:04,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:04,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-21 18:08:04,171 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:04,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:04,171 INFO L85 PathProgramCache]: Analyzing trace with hash -505498802, now seen corresponding path program 1 times [2021-12-21 18:08:04,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:04,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260950609] [2021-12-21 18:08:04,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:04,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:04,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:04,283 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 18:08:04,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:04,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260950609] [2021-12-21 18:08:04,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260950609] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:04,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:04,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:08:04,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150612995] [2021-12-21 18:08:04,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:04,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:08:04,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:04,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:08:04,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:08:04,286 INFO L87 Difference]: Start difference. First operand 529 states and 696 transitions. Second operand has 6 states, 5 states have (on average 6.8) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:04,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:04,506 INFO L93 Difference]: Finished difference Result 765 states and 959 transitions. [2021-12-21 18:08:04,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:08:04,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-12-21 18:08:04,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:04,509 INFO L225 Difference]: With dead ends: 765 [2021-12-21 18:08:04,509 INFO L226 Difference]: Without dead ends: 765 [2021-12-21 18:08:04,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-21 18:08:04,510 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 708 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:04,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 700 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:08:04,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-12-21 18:08:04,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 528. [2021-12-21 18:08:04,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 459 states have (on average 1.4509803921568627) internal successors, (666), 509 states have internal predecessors, (666), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-21 18:08:04,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 694 transitions. [2021-12-21 18:08:04,536 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 694 transitions. Word has length 36 [2021-12-21 18:08:04,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:04,537 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 694 transitions. [2021-12-21 18:08:04,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:04,538 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 694 transitions. [2021-12-21 18:08:04,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-21 18:08:04,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:04,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:04,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-21 18:08:04,539 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:04,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:04,539 INFO L85 PathProgramCache]: Analyzing trace with hash -505498641, now seen corresponding path program 1 times [2021-12-21 18:08:04,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:04,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566549374] [2021-12-21 18:08:04,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:04,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:04,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:04,657 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 18:08:04,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:04,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566549374] [2021-12-21 18:08:04,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566549374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:04,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:04,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:08:04,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641175958] [2021-12-21 18:08:04,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:04,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:08:04,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:04,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:08:04,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:08:04,660 INFO L87 Difference]: Start difference. First operand 528 states and 694 transitions. Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:04,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:04,907 INFO L93 Difference]: Finished difference Result 683 states and 837 transitions. [2021-12-21 18:08:04,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:08:04,908 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-12-21 18:08:04,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:04,909 INFO L225 Difference]: With dead ends: 683 [2021-12-21 18:08:04,909 INFO L226 Difference]: Without dead ends: 683 [2021-12-21 18:08:04,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:08:04,910 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 611 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:04,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 450 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:08:04,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-12-21 18:08:04,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 528. [2021-12-21 18:08:04,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 459 states have (on average 1.446623093681917) internal successors, (664), 509 states have internal predecessors, (664), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-21 18:08:04,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 692 transitions. [2021-12-21 18:08:04,920 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 692 transitions. Word has length 36 [2021-12-21 18:08:04,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:04,920 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 692 transitions. [2021-12-21 18:08:04,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:04,920 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 692 transitions. [2021-12-21 18:08:04,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-21 18:08:04,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:04,921 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:04,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-21 18:08:04,922 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:04,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:04,922 INFO L85 PathProgramCache]: Analyzing trace with hash -2111288145, now seen corresponding path program 1 times [2021-12-21 18:08:04,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:04,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028531414] [2021-12-21 18:08:04,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:04,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:04,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 18:08:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:04,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 18:08:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:08:04,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:04,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028531414] [2021-12-21 18:08:04,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028531414] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:08:04,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598475505] [2021-12-21 18:08:04,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:04,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:08:04,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:08:04,999 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 18:08:05,009 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 18:08:05,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:05,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 18:08:05,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:08:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:05,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:08:05,460 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-21 18:08:05,463 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 18:08:05,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:08:05,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598475505] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:08:05,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:08:05,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-12-21 18:08:05,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801083559] [2021-12-21 18:08:05,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:08:05,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 18:08:05,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:05,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 18:08:05,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-21 18:08:05,524 INFO L87 Difference]: Start difference. First operand 528 states and 692 transitions. Second operand has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:08:06,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:06,286 INFO L93 Difference]: Finished difference Result 1659 states and 2022 transitions. [2021-12-21 18:08:06,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 18:08:06,286 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 46 [2021-12-21 18:08:06,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:06,291 INFO L225 Difference]: With dead ends: 1659 [2021-12-21 18:08:06,292 INFO L226 Difference]: Without dead ends: 1659 [2021-12-21 18:08:06,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-12-21 18:08:06,293 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 2182 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2184 SdHoareTripleChecker+Valid, 1561 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:06,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2184 Valid, 1561 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 18:08:06,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2021-12-21 18:08:06,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 628. [2021-12-21 18:08:06,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 556 states have (on average 1.3974820143884892) internal successors, (777), 602 states have internal predecessors, (777), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (20), 15 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-21 18:08:06,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 817 transitions. [2021-12-21 18:08:06,313 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 817 transitions. Word has length 46 [2021-12-21 18:08:06,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:06,313 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 817 transitions. [2021-12-21 18:08:06,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:08:06,314 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 817 transitions. [2021-12-21 18:08:06,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-21 18:08:06,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:06,315 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:06,340 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 18:08:06,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-21 18:08:06,532 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:06,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:06,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1830908708, now seen corresponding path program 1 times [2021-12-21 18:08:06,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:06,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827850578] [2021-12-21 18:08:06,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:06,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:06,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:06,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:06,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-21 18:08:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:08:06,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:06,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827850578] [2021-12-21 18:08:06,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827850578] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:08:06,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306773791] [2021-12-21 18:08:06,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:06,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:08:06,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:08:06,589 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 18:08:06,611 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 18:08:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:06,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 18:08:06,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:08:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:06,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:08:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:08:06,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306773791] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:08:06,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:08:06,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-21 18:08:06,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417311441] [2021-12-21 18:08:06,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:08:06,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:08:06,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:06,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:08:06,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:08:06,914 INFO L87 Difference]: Start difference. First operand 628 states and 817 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-21 18:08:06,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:06,988 INFO L93 Difference]: Finished difference Result 1810 states and 2379 transitions. [2021-12-21 18:08:06,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 18:08:06,989 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2021-12-21 18:08:06,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:06,994 INFO L225 Difference]: With dead ends: 1810 [2021-12-21 18:08:06,995 INFO L226 Difference]: Without dead ends: 1810 [2021-12-21 18:08:06,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-12-21 18:08:06,995 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 859 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:06,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 1005 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:08:06,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2021-12-21 18:08:07,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1180. [2021-12-21 18:08:07,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1099 states have (on average 1.4222020018198362) internal successors, (1563), 1145 states have internal predecessors, (1563), 29 states have call successors, (29), 10 states have call predecessors, (29), 10 states have return successors, (29), 24 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-21 18:08:07,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1621 transitions. [2021-12-21 18:08:07,022 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1621 transitions. Word has length 50 [2021-12-21 18:08:07,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:07,022 INFO L470 AbstractCegarLoop]: Abstraction has 1180 states and 1621 transitions. [2021-12-21 18:08:07,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-21 18:08:07,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1621 transitions. [2021-12-21 18:08:07,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-21 18:08:07,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:07,023 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:07,054 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 18:08:07,247 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,SelfDestructingSolverStorable35 [2021-12-21 18:08:07,248 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:07,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:07,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1129844130, now seen corresponding path program 1 times [2021-12-21 18:08:07,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:07,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51267129] [2021-12-21 18:08:07,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:07,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:07,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:07,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-21 18:08:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:08:07,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:07,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51267129] [2021-12-21 18:08:07,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51267129] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:07,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:07,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:08:07,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694694740] [2021-12-21 18:08:07,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:07,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:08:07,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:07,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:08:07,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:08:07,338 INFO L87 Difference]: Start difference. First operand 1180 states and 1621 transitions. Second operand has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 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 18:08:07,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:07,531 INFO L93 Difference]: Finished difference Result 1280 states and 1724 transitions. [2021-12-21 18:08:07,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:08:07,531 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 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) Word has length 50 [2021-12-21 18:08:07,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:07,535 INFO L225 Difference]: With dead ends: 1280 [2021-12-21 18:08:07,535 INFO L226 Difference]: Without dead ends: 1280 [2021-12-21 18:08:07,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-12-21 18:08:07,536 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 502 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:07,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 429 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:08:07,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-12-21 18:08:07,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1177. [2021-12-21 18:08:07,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1099 states have (on average 1.4094631483166515) internal successors, (1549), 1142 states have internal predecessors, (1549), 29 states have call successors, (29), 10 states have call predecessors, (29), 10 states have return successors, (29), 24 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-21 18:08:07,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1607 transitions. [2021-12-21 18:08:07,555 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1607 transitions. Word has length 50 [2021-12-21 18:08:07,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:07,556 INFO L470 AbstractCegarLoop]: Abstraction has 1177 states and 1607 transitions. [2021-12-21 18:08:07,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 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 18:08:07,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1607 transitions. [2021-12-21 18:08:07,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-21 18:08:07,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:07,557 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:07,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-21 18:08:07,557 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:07,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:07,560 INFO L85 PathProgramCache]: Analyzing trace with hash -642104005, now seen corresponding path program 1 times [2021-12-21 18:08:07,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:07,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776317178] [2021-12-21 18:08:07,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:07,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:07,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 18:08:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:07,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:07,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:07,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776317178] [2021-12-21 18:08:07,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776317178] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:08:07,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213413509] [2021-12-21 18:08:07,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:07,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:08:07,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:08:07,607 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 18:08:07,609 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 18:08:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:07,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 18:08:07,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:08:07,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:07,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:08:07,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:07,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213413509] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:08:07,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:08:07,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-21 18:08:07,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736176049] [2021-12-21 18:08:07,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:08:07,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:08:07,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:07,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:08:07,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:08:07,926 INFO L87 Difference]: Start difference. First operand 1177 states and 1607 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:08:07,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:07,986 INFO L93 Difference]: Finished difference Result 2251 states and 2962 transitions. [2021-12-21 18:08:07,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 18:08:07,987 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 51 [2021-12-21 18:08:07,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:07,993 INFO L225 Difference]: With dead ends: 2251 [2021-12-21 18:08:07,994 INFO L226 Difference]: Without dead ends: 2251 [2021-12-21 18:08:07,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-12-21 18:08:07,994 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 554 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:07,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 715 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:08:07,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-12-21 18:08:08,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1926. [2021-12-21 18:08:08,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1818 states have (on average 1.3778877887788779) internal successors, (2505), 1861 states have internal predecessors, (2505), 59 states have call successors, (59), 10 states have call predecessors, (59), 10 states have return successors, (59), 54 states have call predecessors, (59), 59 states have call successors, (59) [2021-12-21 18:08:08,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 2623 transitions. [2021-12-21 18:08:08,025 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 2623 transitions. Word has length 51 [2021-12-21 18:08:08,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:08,026 INFO L470 AbstractCegarLoop]: Abstraction has 1926 states and 2623 transitions. [2021-12-21 18:08:08,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:08:08,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 2623 transitions. [2021-12-21 18:08:08,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-21 18:08:08,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:08,027 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:08,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-21 18:08:08,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:08:08,243 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:08,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:08,244 INFO L85 PathProgramCache]: Analyzing trace with hash -55297991, now seen corresponding path program 1 times [2021-12-21 18:08:08,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:08,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390536457] [2021-12-21 18:08:08,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:08,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:08,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 18:08:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:08:08,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:08,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390536457] [2021-12-21 18:08:08,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390536457] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:08:08,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825013765] [2021-12-21 18:08:08,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:08,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:08:08,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:08:08,280 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 18:08:08,282 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 18:08:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:08,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 18:08:08,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:08:08,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:08:08,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:08:08,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:08:08,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825013765] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:08:08,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:08:08,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2021-12-21 18:08:08,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113276076] [2021-12-21 18:08:08,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:08:08,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 18:08:08,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:08,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 18:08:08,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:08:08,580 INFO L87 Difference]: Start difference. First operand 1926 states and 2623 transitions. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:08:08,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:08,645 INFO L93 Difference]: Finished difference Result 6791 states and 9240 transitions. [2021-12-21 18:08:08,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 18:08:08,646 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 51 [2021-12-21 18:08:08,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:08,661 INFO L225 Difference]: With dead ends: 6791 [2021-12-21 18:08:08,662 INFO L226 Difference]: Without dead ends: 6791 [2021-12-21 18:08:08,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:08:08,663 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 566 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:08,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 1086 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:08:08,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6791 states. [2021-12-21 18:08:08,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6791 to 4827. [2021-12-21 18:08:08,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4827 states, 4629 states have (on average 1.3687621516526247) internal successors, (6336), 4677 states have internal predecessors, (6336), 149 states have call successors, (149), 10 states have call predecessors, (149), 10 states have return successors, (149), 139 states have call predecessors, (149), 149 states have call successors, (149) [2021-12-21 18:08:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4827 states to 4827 states and 6634 transitions. [2021-12-21 18:08:08,762 INFO L78 Accepts]: Start accepts. Automaton has 4827 states and 6634 transitions. Word has length 51 [2021-12-21 18:08:08,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:08,763 INFO L470 AbstractCegarLoop]: Abstraction has 4827 states and 6634 transitions. [2021-12-21 18:08:08,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:08:08,763 INFO L276 IsEmpty]: Start isEmpty. Operand 4827 states and 6634 transitions. [2021-12-21 18:08:08,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-21 18:08:08,766 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:08,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:08,793 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 18:08:08,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-21 18:08:08,983 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:08,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:08,984 INFO L85 PathProgramCache]: Analyzing trace with hash -735356361, now seen corresponding path program 1 times [2021-12-21 18:08:08,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:08,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152429923] [2021-12-21 18:08:08,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:08,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:09,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:09,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 18:08:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:09,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:09,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152429923] [2021-12-21 18:08:09,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152429923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:09,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:09,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:08:09,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311923219] [2021-12-21 18:08:09,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:09,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:08:09,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:09,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:08:09,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:08:09,033 INFO L87 Difference]: Start difference. First operand 4827 states and 6634 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:09,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:09,059 INFO L93 Difference]: Finished difference Result 5546 states and 7718 transitions. [2021-12-21 18:08:09,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:08:09,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-12-21 18:08:09,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:09,070 INFO L225 Difference]: With dead ends: 5546 [2021-12-21 18:08:09,070 INFO L226 Difference]: Without dead ends: 5546 [2021-12-21 18:08:09,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:08:09,071 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 153 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:09,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 707 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:08:09,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5546 states. [2021-12-21 18:08:09,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5546 to 4588. [2021-12-21 18:08:09,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4588 states, 4404 states have (on average 1.3771571298819256) internal successors, (6065), 4452 states have internal predecessors, (6065), 136 states have call successors, (136), 9 states have call predecessors, (136), 9 states have return successors, (136), 126 states have call predecessors, (136), 136 states have call successors, (136) [2021-12-21 18:08:09,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4588 states to 4588 states and 6337 transitions. [2021-12-21 18:08:09,139 INFO L78 Accepts]: Start accepts. Automaton has 4588 states and 6337 transitions. Word has length 51 [2021-12-21 18:08:09,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:09,140 INFO L470 AbstractCegarLoop]: Abstraction has 4588 states and 6337 transitions. [2021-12-21 18:08:09,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:09,140 INFO L276 IsEmpty]: Start isEmpty. Operand 4588 states and 6337 transitions. [2021-12-21 18:08:09,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-21 18:08:09,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:09,141 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:09,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-21 18:08:09,141 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:09,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:09,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1366525278, now seen corresponding path program 1 times [2021-12-21 18:08:09,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:09,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150134849] [2021-12-21 18:08:09,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:09,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:09,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:09,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:09,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150134849] [2021-12-21 18:08:09,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150134849] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:09,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:09,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 18:08:09,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43677577] [2021-12-21 18:08:09,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:09,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 18:08:09,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:09,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 18:08:09,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:08:09,326 INFO L87 Difference]: Start difference. First operand 4588 states and 6337 transitions. Second operand has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:09,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:09,665 INFO L93 Difference]: Finished difference Result 4636 states and 6368 transitions. [2021-12-21 18:08:09,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 18:08:09,666 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-12-21 18:08:09,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:09,674 INFO L225 Difference]: With dead ends: 4636 [2021-12-21 18:08:09,674 INFO L226 Difference]: Without dead ends: 4636 [2021-12-21 18:08:09,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-12-21 18:08:09,675 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 528 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:09,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 812 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:08:09,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4636 states. [2021-12-21 18:08:09,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4636 to 4590. [2021-12-21 18:08:09,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4590 states, 4406 states have (on average 1.377212891511575) internal successors, (6068), 4454 states have internal predecessors, (6068), 136 states have call successors, (136), 9 states have call predecessors, (136), 9 states have return successors, (136), 126 states have call predecessors, (136), 136 states have call successors, (136) [2021-12-21 18:08:09,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4590 states to 4590 states and 6340 transitions. [2021-12-21 18:08:09,738 INFO L78 Accepts]: Start accepts. Automaton has 4590 states and 6340 transitions. Word has length 51 [2021-12-21 18:08:09,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:09,739 INFO L470 AbstractCegarLoop]: Abstraction has 4590 states and 6340 transitions. [2021-12-21 18:08:09,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:09,739 INFO L276 IsEmpty]: Start isEmpty. Operand 4590 states and 6340 transitions. [2021-12-21 18:08:09,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-21 18:08:09,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:09,740 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:09,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-21 18:08:09,741 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:09,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:09,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1366525340, now seen corresponding path program 1 times [2021-12-21 18:08:09,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:09,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974986393] [2021-12-21 18:08:09,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:09,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:09,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:09,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:09,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974986393] [2021-12-21 18:08:09,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974986393] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:09,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:09,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:08:09,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953524679] [2021-12-21 18:08:09,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:09,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:08:09,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:09,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:08:09,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:08:09,832 INFO L87 Difference]: Start difference. First operand 4590 states and 6340 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:10,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:10,009 INFO L93 Difference]: Finished difference Result 4635 states and 6366 transitions. [2021-12-21 18:08:10,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:08:10,010 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-12-21 18:08:10,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:10,018 INFO L225 Difference]: With dead ends: 4635 [2021-12-21 18:08:10,019 INFO L226 Difference]: Without dead ends: 4635 [2021-12-21 18:08:10,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-12-21 18:08:10,020 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 286 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:10,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 455 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:08:10,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4635 states. [2021-12-21 18:08:10,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4635 to 4587. [2021-12-21 18:08:10,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4587 states, 4404 states have (on average 1.3767029972752043) internal successors, (6063), 4451 states have internal predecessors, (6063), 136 states have call successors, (136), 9 states have call predecessors, (136), 9 states have return successors, (136), 126 states have call predecessors, (136), 136 states have call successors, (136) [2021-12-21 18:08:10,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4587 states to 4587 states and 6335 transitions. [2021-12-21 18:08:10,098 INFO L78 Accepts]: Start accepts. Automaton has 4587 states and 6335 transitions. Word has length 51 [2021-12-21 18:08:10,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:10,099 INFO L470 AbstractCegarLoop]: Abstraction has 4587 states and 6335 transitions. [2021-12-21 18:08:10,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:10,099 INFO L276 IsEmpty]: Start isEmpty. Operand 4587 states and 6335 transitions. [2021-12-21 18:08:10,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-21 18:08:10,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:10,100 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:10,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-21 18:08:10,101 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:10,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:10,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1854248023, now seen corresponding path program 1 times [2021-12-21 18:08:10,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:10,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671262576] [2021-12-21 18:08:10,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:10,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:10,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:10,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 18:08:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:10,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:10,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:10,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671262576] [2021-12-21 18:08:10,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671262576] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:08:10,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251392973] [2021-12-21 18:08:10,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:10,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:08:10,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:08:10,186 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 18:08:10,213 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 18:08:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:10,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 18:08:10,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:08:10,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:08:10,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-21 18:08:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:08:10,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:08:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:08:10,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251392973] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:08:10,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:08:10,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 15 [2021-12-21 18:08:10,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407623168] [2021-12-21 18:08:10,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:08:10,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 18:08:10,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:10,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 18:08:10,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-21 18:08:10,954 INFO L87 Difference]: Start difference. First operand 4587 states and 6335 transitions. Second operand has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 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 18:08:11,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:11,693 INFO L93 Difference]: Finished difference Result 6000 states and 8330 transitions. [2021-12-21 18:08:11,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 18:08:11,694 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 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) Word has length 52 [2021-12-21 18:08:11,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:11,704 INFO L225 Difference]: With dead ends: 6000 [2021-12-21 18:08:11,705 INFO L226 Difference]: Without dead ends: 5993 [2021-12-21 18:08:11,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-12-21 18:08:11,710 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 643 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 2079 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:11,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [646 Valid, 2079 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 18:08:11,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5993 states. [2021-12-21 18:08:11,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5993 to 4632. [2021-12-21 18:08:11,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4632 states, 4449 states have (on average 1.372443245673185) internal successors, (6106), 4496 states have internal predecessors, (6106), 136 states have call successors, (136), 9 states have call predecessors, (136), 9 states have return successors, (136), 126 states have call predecessors, (136), 136 states have call successors, (136) [2021-12-21 18:08:11,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4632 states to 4632 states and 6378 transitions. [2021-12-21 18:08:11,783 INFO L78 Accepts]: Start accepts. Automaton has 4632 states and 6378 transitions. Word has length 52 [2021-12-21 18:08:11,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:11,785 INFO L470 AbstractCegarLoop]: Abstraction has 4632 states and 6378 transitions. [2021-12-21 18:08:11,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 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 18:08:11,785 INFO L276 IsEmpty]: Start isEmpty. Operand 4632 states and 6378 transitions. [2021-12-21 18:08:11,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 18:08:11,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:11,787 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:11,816 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 18:08:12,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:08:12,005 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:12,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:12,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1882183379, now seen corresponding path program 1 times [2021-12-21 18:08:12,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:12,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024866138] [2021-12-21 18:08:12,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:12,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:12,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 18:08:12,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:12,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 18:08:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:12,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:08:12,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:12,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024866138] [2021-12-21 18:08:12,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024866138] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:08:12,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324720744] [2021-12-21 18:08:12,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:12,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:08:12,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:08:12,103 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 18:08:12,104 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 18:08:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:12,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-21 18:08:12,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:08:12,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:08:12,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-21 18:08:12,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:08:12,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-21 18:08:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:08:12,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:08:12,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324720744] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:12,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:08:12,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2021-12-21 18:08:12,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267736230] [2021-12-21 18:08:12,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:12,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:08:12,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:12,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:08:12,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-21 18:08:12,526 INFO L87 Difference]: Start difference. First operand 4632 states and 6378 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 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 18:08:12,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:12,805 INFO L93 Difference]: Finished difference Result 3697 states and 5153 transitions. [2021-12-21 18:08:12,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 18:08:12,806 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 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 54 [2021-12-21 18:08:12,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:12,813 INFO L225 Difference]: With dead ends: 3697 [2021-12-21 18:08:12,813 INFO L226 Difference]: Without dead ends: 3697 [2021-12-21 18:08:12,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-12-21 18:08:12,814 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 298 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1444 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:12,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 1444 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:08:12,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3697 states. [2021-12-21 18:08:12,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3697 to 2997. [2021-12-21 18:08:12,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2997 states, 2879 states have (on average 1.408475164987843) internal successors, (4055), 2916 states have internal predecessors, (4055), 76 states have call successors, (76), 4 states have call predecessors, (76), 4 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2021-12-21 18:08:12,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 4207 transitions. [2021-12-21 18:08:12,861 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 4207 transitions. Word has length 54 [2021-12-21 18:08:12,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:12,861 INFO L470 AbstractCegarLoop]: Abstraction has 2997 states and 4207 transitions. [2021-12-21 18:08:12,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 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 18:08:12,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 4207 transitions. [2021-12-21 18:08:12,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 18:08:12,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:12,862 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:12,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 18:08:13,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:08:13,069 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:13,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:13,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1840199306, now seen corresponding path program 1 times [2021-12-21 18:08:13,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:13,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410812923] [2021-12-21 18:08:13,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:13,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:13,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:13,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:13,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410812923] [2021-12-21 18:08:13,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410812923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:13,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:13,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-21 18:08:13,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346523943] [2021-12-21 18:08:13,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:13,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 18:08:13,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:13,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 18:08:13,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-12-21 18:08:13,320 INFO L87 Difference]: Start difference. First operand 2997 states and 4207 transitions. Second operand has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:14,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:14,006 INFO L93 Difference]: Finished difference Result 7440 states and 10662 transitions. [2021-12-21 18:08:14,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 18:08:14,006 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-12-21 18:08:14,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:14,020 INFO L225 Difference]: With dead ends: 7440 [2021-12-21 18:08:14,021 INFO L226 Difference]: Without dead ends: 7440 [2021-12-21 18:08:14,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2021-12-21 18:08:14,024 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 1418 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1420 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:14,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1420 Valid, 1260 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 18:08:14,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7440 states. [2021-12-21 18:08:14,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7440 to 4294. [2021-12-21 18:08:14,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4294 states, 4121 states have (on average 1.4098519776753216) internal successors, (5810), 4182 states have internal predecessors, (5810), 129 states have call successors, (129), 7 states have call predecessors, (129), 7 states have return successors, (129), 104 states have call predecessors, (129), 129 states have call successors, (129) [2021-12-21 18:08:14,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 6068 transitions. [2021-12-21 18:08:14,104 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 6068 transitions. Word has length 54 [2021-12-21 18:08:14,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:14,105 INFO L470 AbstractCegarLoop]: Abstraction has 4294 states and 6068 transitions. [2021-12-21 18:08:14,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:14,105 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 6068 transitions. [2021-12-21 18:08:14,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 18:08:14,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:14,106 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:14,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-21 18:08:14,107 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:14,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:14,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1840199305, now seen corresponding path program 1 times [2021-12-21 18:08:14,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:14,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002541518] [2021-12-21 18:08:14,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:14,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:14,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:14,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:14,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:14,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:14,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002541518] [2021-12-21 18:08:14,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002541518] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:14,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:14,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 18:08:14,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692115513] [2021-12-21 18:08:14,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:14,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 18:08:14,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:14,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 18:08:14,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-21 18:08:14,445 INFO L87 Difference]: Start difference. First operand 4294 states and 6068 transitions. Second operand has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:15,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:15,289 INFO L93 Difference]: Finished difference Result 7146 states and 10222 transitions. [2021-12-21 18:08:15,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 18:08:15,289 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-12-21 18:08:15,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:15,303 INFO L225 Difference]: With dead ends: 7146 [2021-12-21 18:08:15,304 INFO L226 Difference]: Without dead ends: 7146 [2021-12-21 18:08:15,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2021-12-21 18:08:15,306 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 1078 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1078 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:15,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1078 Valid, 1113 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 18:08:15,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7146 states. [2021-12-21 18:08:15,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7146 to 4539. [2021-12-21 18:08:15,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4539 states, 4352 states have (on average 1.4092371323529411) internal successors, (6133), 4415 states have internal predecessors, (6133), 142 states have call successors, (142), 8 states have call predecessors, (142), 8 states have return successors, (142), 115 states have call predecessors, (142), 142 states have call successors, (142) [2021-12-21 18:08:15,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 6417 transitions. [2021-12-21 18:08:15,378 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 6417 transitions. Word has length 54 [2021-12-21 18:08:15,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:15,378 INFO L470 AbstractCegarLoop]: Abstraction has 4539 states and 6417 transitions. [2021-12-21 18:08:15,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:15,378 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 6417 transitions. [2021-12-21 18:08:15,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 18:08:15,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:15,380 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:15,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-21 18:08:15,380 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:15,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:15,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1838352264, now seen corresponding path program 1 times [2021-12-21 18:08:15,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:15,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376732207] [2021-12-21 18:08:15,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:15,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:15,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:15,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:15,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:15,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376732207] [2021-12-21 18:08:15,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376732207] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:15,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:15,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 18:08:15,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180004901] [2021-12-21 18:08:15,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:15,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 18:08:15,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:16,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 18:08:16,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:08:16,000 INFO L87 Difference]: Start difference. First operand 4539 states and 6417 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:16,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:16,431 INFO L93 Difference]: Finished difference Result 4581 states and 6459 transitions. [2021-12-21 18:08:16,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:08:16,431 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-12-21 18:08:16,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:16,438 INFO L225 Difference]: With dead ends: 4581 [2021-12-21 18:08:16,439 INFO L226 Difference]: Without dead ends: 4581 [2021-12-21 18:08:16,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-21 18:08:16,440 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 122 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:16,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 751 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:08:16,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4581 states. [2021-12-21 18:08:16,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4581 to 4577. [2021-12-21 18:08:16,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4577 states, 4390 states have (on average 1.4056947608200456) internal successors, (6171), 4453 states have internal predecessors, (6171), 142 states have call successors, (142), 8 states have call predecessors, (142), 8 states have return successors, (142), 115 states have call predecessors, (142), 142 states have call successors, (142) [2021-12-21 18:08:16,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4577 states to 4577 states and 6455 transitions. [2021-12-21 18:08:16,493 INFO L78 Accepts]: Start accepts. Automaton has 4577 states and 6455 transitions. Word has length 54 [2021-12-21 18:08:16,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:16,493 INFO L470 AbstractCegarLoop]: Abstraction has 4577 states and 6455 transitions. [2021-12-21 18:08:16,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:16,494 INFO L276 IsEmpty]: Start isEmpty. Operand 4577 states and 6455 transitions. [2021-12-21 18:08:16,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 18:08:16,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:16,495 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:16,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-21 18:08:16,495 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:16,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:16,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1320627297, now seen corresponding path program 1 times [2021-12-21 18:08:16,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:16,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515596308] [2021-12-21 18:08:16,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:16,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:16,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:16,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:16,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:16,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515596308] [2021-12-21 18:08:16,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515596308] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:16,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:16,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 18:08:16,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874509120] [2021-12-21 18:08:16,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:16,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 18:08:16,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:16,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 18:08:16,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-21 18:08:16,769 INFO L87 Difference]: Start difference. First operand 4577 states and 6455 transitions. Second operand has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:17,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:17,264 INFO L93 Difference]: Finished difference Result 7643 states and 10898 transitions. [2021-12-21 18:08:17,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 18:08:17,264 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-12-21 18:08:17,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:17,273 INFO L225 Difference]: With dead ends: 7643 [2021-12-21 18:08:17,273 INFO L226 Difference]: Without dead ends: 7643 [2021-12-21 18:08:17,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-12-21 18:08:17,274 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 1075 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:17,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1077 Valid, 1118 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 18:08:17,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7643 states. [2021-12-21 18:08:17,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7643 to 5814. [2021-12-21 18:08:17,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5814 states, 5517 states have (on average 1.3839042958129417) internal successors, (7635), 5628 states have internal predecessors, (7635), 246 states have call successors, (246), 14 states have call predecessors, (246), 14 states have return successors, (246), 171 states have call predecessors, (246), 246 states have call successors, (246) [2021-12-21 18:08:17,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5814 states to 5814 states and 8127 transitions. [2021-12-21 18:08:17,357 INFO L78 Accepts]: Start accepts. Automaton has 5814 states and 8127 transitions. Word has length 55 [2021-12-21 18:08:17,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:17,357 INFO L470 AbstractCegarLoop]: Abstraction has 5814 states and 8127 transitions. [2021-12-21 18:08:17,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:17,357 INFO L276 IsEmpty]: Start isEmpty. Operand 5814 states and 8127 transitions. [2021-12-21 18:08:17,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 18:08:17,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:17,358 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:17,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-21 18:08:17,359 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:17,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:17,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1320627296, now seen corresponding path program 1 times [2021-12-21 18:08:17,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:17,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411112804] [2021-12-21 18:08:17,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:17,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:17,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:17,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:17,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411112804] [2021-12-21 18:08:17,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411112804] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:17,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:17,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 18:08:17,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916017818] [2021-12-21 18:08:17,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:17,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 18:08:17,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:17,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 18:08:17,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-21 18:08:17,628 INFO L87 Difference]: Start difference. First operand 5814 states and 8127 transitions. Second operand has 11 states, 10 states have (on average 5.3) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:18,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:18,122 INFO L93 Difference]: Finished difference Result 7519 states and 10686 transitions. [2021-12-21 18:08:18,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 18:08:18,123 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.3) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-12-21 18:08:18,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:18,135 INFO L225 Difference]: With dead ends: 7519 [2021-12-21 18:08:18,135 INFO L226 Difference]: Without dead ends: 7519 [2021-12-21 18:08:18,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-12-21 18:08:18,137 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 992 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:18,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [992 Valid, 835 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 18:08:18,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7519 states. [2021-12-21 18:08:18,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7519 to 6287. [2021-12-21 18:08:18,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6287 states, 5962 states have (on average 1.3849379402884938) internal successors, (8257), 6077 states have internal predecessors, (8257), 272 states have call successors, (272), 16 states have call predecessors, (272), 16 states have return successors, (272), 193 states have call predecessors, (272), 272 states have call successors, (272) [2021-12-21 18:08:18,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6287 states to 6287 states and 8801 transitions. [2021-12-21 18:08:18,229 INFO L78 Accepts]: Start accepts. Automaton has 6287 states and 8801 transitions. Word has length 55 [2021-12-21 18:08:18,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:18,230 INFO L470 AbstractCegarLoop]: Abstraction has 6287 states and 8801 transitions. [2021-12-21 18:08:18,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.3) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:18,230 INFO L276 IsEmpty]: Start isEmpty. Operand 6287 states and 8801 transitions. [2021-12-21 18:08:18,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 18:08:18,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:18,231 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:18,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-21 18:08:18,232 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:18,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:18,232 INFO L85 PathProgramCache]: Analyzing trace with hash 453056025, now seen corresponding path program 1 times [2021-12-21 18:08:18,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:18,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037004968] [2021-12-21 18:08:18,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:18,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:18,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:18,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 18:08:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 18:08:18,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:18,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037004968] [2021-12-21 18:08:18,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037004968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:18,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:18,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:08:18,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256189036] [2021-12-21 18:08:18,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:18,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:08:18,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:18,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:08:18,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:08:18,299 INFO L87 Difference]: Start difference. First operand 6287 states and 8801 transitions. Second operand has 5 states, 4 states have (on average 12.0) internal successors, (48), 5 states have internal predecessors, (48), 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 18:08:18,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:18,340 INFO L93 Difference]: Finished difference Result 7344 states and 10187 transitions. [2021-12-21 18:08:18,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:08:18,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.0) internal successors, (48), 5 states have internal predecessors, (48), 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 56 [2021-12-21 18:08:18,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:18,351 INFO L225 Difference]: With dead ends: 7344 [2021-12-21 18:08:18,351 INFO L226 Difference]: Without dead ends: 7344 [2021-12-21 18:08:18,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:08:18,352 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 270 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:18,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 438 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:08:18,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7344 states. [2021-12-21 18:08:18,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7344 to 6286. [2021-12-21 18:08:18,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6286 states, 5962 states have (on average 1.3768869506876886) internal successors, (8209), 6076 states have internal predecessors, (8209), 272 states have call successors, (272), 16 states have call predecessors, (272), 16 states have return successors, (272), 193 states have call predecessors, (272), 272 states have call successors, (272) [2021-12-21 18:08:18,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6286 states to 6286 states and 8753 transitions. [2021-12-21 18:08:18,466 INFO L78 Accepts]: Start accepts. Automaton has 6286 states and 8753 transitions. Word has length 56 [2021-12-21 18:08:18,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:18,466 INFO L470 AbstractCegarLoop]: Abstraction has 6286 states and 8753 transitions. [2021-12-21 18:08:18,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.0) internal successors, (48), 5 states have internal predecessors, (48), 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 18:08:18,466 INFO L276 IsEmpty]: Start isEmpty. Operand 6286 states and 8753 transitions. [2021-12-21 18:08:18,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 18:08:18,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:18,469 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:18,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-21 18:08:18,469 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:18,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:18,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1775377953, now seen corresponding path program 1 times [2021-12-21 18:08:18,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:18,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708911890] [2021-12-21 18:08:18,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:18,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:18,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:18,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 18:08:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:08:18,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:18,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708911890] [2021-12-21 18:08:18,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708911890] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:08:18,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733174149] [2021-12-21 18:08:18,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:18,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:08:18,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:08:18,812 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 18:08:18,813 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 18:08:18,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:18,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-21 18:08:18,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:08:19,006 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:08:19,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 18:08:19,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-21 18:08:19,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-21 18:08:19,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:08:19,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-21 18:08:19,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:08:19,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-21 18:08:19,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-21 18:08:19,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-21 18:08:19,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 [2021-12-21 18:08:19,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 [2021-12-21 18:08:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:19,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:08:19,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733174149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:19,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:08:19,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 24 [2021-12-21 18:08:19,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058846804] [2021-12-21 18:08:19,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:19,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 18:08:19,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:19,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 18:08:19,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-12-21 18:08:19,415 INFO L87 Difference]: Start difference. First operand 6286 states and 8753 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 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 18:08:20,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:20,015 INFO L93 Difference]: Finished difference Result 9036 states and 12596 transitions. [2021-12-21 18:08:20,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 18:08:20,015 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 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 56 [2021-12-21 18:08:20,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:20,027 INFO L225 Difference]: With dead ends: 9036 [2021-12-21 18:08:20,028 INFO L226 Difference]: Without dead ends: 9036 [2021-12-21 18:08:20,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-12-21 18:08:20,029 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 695 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:20,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 1111 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 18:08:20,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9036 states. [2021-12-21 18:08:20,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9036 to 6329. [2021-12-21 18:08:20,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6329 states, 6006 states have (on average 1.3734598734598735) internal successors, (8249), 6119 states have internal predecessors, (8249), 271 states have call successors, (271), 16 states have call predecessors, (271), 16 states have return successors, (271), 193 states have call predecessors, (271), 271 states have call successors, (271) [2021-12-21 18:08:20,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6329 states to 6329 states and 8791 transitions. [2021-12-21 18:08:20,151 INFO L78 Accepts]: Start accepts. Automaton has 6329 states and 8791 transitions. Word has length 56 [2021-12-21 18:08:20,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:20,151 INFO L470 AbstractCegarLoop]: Abstraction has 6329 states and 8791 transitions. [2021-12-21 18:08:20,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 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 18:08:20,152 INFO L276 IsEmpty]: Start isEmpty. Operand 6329 states and 8791 transitions. [2021-12-21 18:08:20,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 18:08:20,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:20,153 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:20,207 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 18:08:20,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:08:20,371 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:20,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:20,372 INFO L85 PathProgramCache]: Analyzing trace with hash 840572766, now seen corresponding path program 1 times [2021-12-21 18:08:20,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:20,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137306914] [2021-12-21 18:08:20,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:20,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:20,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:20,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:20,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:20,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137306914] [2021-12-21 18:08:20,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137306914] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:20,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:20,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-21 18:08:20,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555089179] [2021-12-21 18:08:20,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:20,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 18:08:20,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:20,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 18:08:20,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-12-21 18:08:20,919 INFO L87 Difference]: Start difference. First operand 6329 states and 8791 transitions. Second operand has 17 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:22,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:22,325 INFO L93 Difference]: Finished difference Result 9541 states and 13400 transitions. [2021-12-21 18:08:22,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-21 18:08:22,326 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-12-21 18:08:22,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:22,339 INFO L225 Difference]: With dead ends: 9541 [2021-12-21 18:08:22,340 INFO L226 Difference]: Without dead ends: 9541 [2021-12-21 18:08:22,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=282, Invalid=908, Unknown=0, NotChecked=0, Total=1190 [2021-12-21 18:08:22,341 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 1642 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1644 SdHoareTripleChecker+Valid, 1536 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:22,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1644 Valid, 1536 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 18:08:22,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9541 states. [2021-12-21 18:08:22,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9541 to 7647. [2021-12-21 18:08:22,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7647 states, 7214 states have (on average 1.3635985583587469) internal successors, (9837), 7375 states have internal predecessors, (9837), 375 states have call successors, (375), 22 states have call predecessors, (375), 22 states have return successors, (375), 249 states have call predecessors, (375), 375 states have call successors, (375) [2021-12-21 18:08:22,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7647 states to 7647 states and 10587 transitions. [2021-12-21 18:08:22,480 INFO L78 Accepts]: Start accepts. Automaton has 7647 states and 10587 transitions. Word has length 56 [2021-12-21 18:08:22,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:22,480 INFO L470 AbstractCegarLoop]: Abstraction has 7647 states and 10587 transitions. [2021-12-21 18:08:22,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:22,481 INFO L276 IsEmpty]: Start isEmpty. Operand 7647 states and 10587 transitions. [2021-12-21 18:08:22,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 18:08:22,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:22,482 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:22,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-12-21 18:08:22,482 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:22,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:22,483 INFO L85 PathProgramCache]: Analyzing trace with hash 840572767, now seen corresponding path program 1 times [2021-12-21 18:08:22,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:22,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171554032] [2021-12-21 18:08:22,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:22,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:22,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:23,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:23,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:23,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171554032] [2021-12-21 18:08:23,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171554032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:23,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:23,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-21 18:08:23,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028910355] [2021-12-21 18:08:23,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:23,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 18:08:23,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:23,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 18:08:23,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-21 18:08:23,009 INFO L87 Difference]: Start difference. First operand 7647 states and 10587 transitions. Second operand has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:24,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:24,005 INFO L93 Difference]: Finished difference Result 9352 states and 13122 transitions. [2021-12-21 18:08:24,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 18:08:24,006 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-12-21 18:08:24,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:24,019 INFO L225 Difference]: With dead ends: 9352 [2021-12-21 18:08:24,019 INFO L226 Difference]: Without dead ends: 9352 [2021-12-21 18:08:24,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-12-21 18:08:24,020 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 1541 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1543 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:24,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1543 Valid, 1070 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 18:08:24,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9352 states. [2021-12-21 18:08:24,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9352 to 6622. [2021-12-21 18:08:24,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6622 states, 6276 states have (on average 1.369821542383684) internal successors, (8597), 6399 states have internal predecessors, (8597), 293 states have call successors, (293), 17 states have call predecessors, (293), 17 states have return successors, (293), 205 states have call predecessors, (293), 293 states have call successors, (293) [2021-12-21 18:08:24,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6622 states to 6622 states and 9183 transitions. [2021-12-21 18:08:24,122 INFO L78 Accepts]: Start accepts. Automaton has 6622 states and 9183 transitions. Word has length 56 [2021-12-21 18:08:24,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:24,122 INFO L470 AbstractCegarLoop]: Abstraction has 6622 states and 9183 transitions. [2021-12-21 18:08:24,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:24,122 INFO L276 IsEmpty]: Start isEmpty. Operand 6622 states and 9183 transitions. [2021-12-21 18:08:24,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 18:08:24,123 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:24,123 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:24,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-12-21 18:08:24,124 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:24,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:24,124 INFO L85 PathProgramCache]: Analyzing trace with hash 110361472, now seen corresponding path program 1 times [2021-12-21 18:08:24,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:24,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791978185] [2021-12-21 18:08:24,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:24,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:24,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:24,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:24,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 18:08:24,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:08:24,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:24,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791978185] [2021-12-21 18:08:24,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791978185] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:08:24,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204998274] [2021-12-21 18:08:24,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:24,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:08:24,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:08:24,452 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 18:08:24,452 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 18:08:24,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:24,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-21 18:08:24,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:08:24,642 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 18:08:24,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-21 18:08:25,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:08:25,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-21 18:08:25,173 INFO L353 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-12-21 18:08:25,173 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 21 treesize of output 29 [2021-12-21 18:08:25,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-21 18:08:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:25,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:08:25,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204998274] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:08:25,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:08:25,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-12-21 18:08:25,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404919620] [2021-12-21 18:08:25,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:08:25,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-21 18:08:25,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:25,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-21 18:08:25,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-12-21 18:08:25,357 INFO L87 Difference]: Start difference. First operand 6622 states and 9183 transitions. Second operand has 25 states, 24 states have (on average 4.375) internal successors, (105), 23 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:08:26,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:26,612 INFO L93 Difference]: Finished difference Result 15826 states and 22398 transitions. [2021-12-21 18:08:26,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-21 18:08:26,612 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.375) internal successors, (105), 23 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2021-12-21 18:08:26,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:26,635 INFO L225 Difference]: With dead ends: 15826 [2021-12-21 18:08:26,635 INFO L226 Difference]: Without dead ends: 15826 [2021-12-21 18:08:26,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=622, Invalid=2240, Unknown=0, NotChecked=0, Total=2862 [2021-12-21 18:08:26,636 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 3565 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3566 SdHoareTripleChecker+Valid, 1893 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:26,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3566 Valid, 1893 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1094 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 18:08:26,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15826 states. [2021-12-21 18:08:26,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15826 to 7874. [2021-12-21 18:08:26,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7874 states, 7441 states have (on average 1.363526407740895) internal successors, (10146), 7578 states have internal predecessors, (10146), 375 states have call successors, (375), 22 states have call predecessors, (375), 22 states have return successors, (375), 273 states have call predecessors, (375), 375 states have call successors, (375) [2021-12-21 18:08:26,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7874 states to 7874 states and 10896 transitions. [2021-12-21 18:08:26,820 INFO L78 Accepts]: Start accepts. Automaton has 7874 states and 10896 transitions. Word has length 57 [2021-12-21 18:08:26,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:26,820 INFO L470 AbstractCegarLoop]: Abstraction has 7874 states and 10896 transitions. [2021-12-21 18:08:26,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.375) internal successors, (105), 23 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:08:26,821 INFO L276 IsEmpty]: Start isEmpty. Operand 7874 states and 10896 transitions. [2021-12-21 18:08:26,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 18:08:26,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:26,822 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:26,847 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 18:08:27,046 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,SelfDestructingSolverStorable53 [2021-12-21 18:08:27,047 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:27,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:27,047 INFO L85 PathProgramCache]: Analyzing trace with hash 110361473, now seen corresponding path program 1 times [2021-12-21 18:08:27,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:27,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731093113] [2021-12-21 18:08:27,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:27,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:27,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:27,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 18:08:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:08:27,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:27,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731093113] [2021-12-21 18:08:27,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731093113] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:08:27,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940479863] [2021-12-21 18:08:27,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:27,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:08:27,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:08:27,709 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 18:08:27,731 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 18:08:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:27,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-21 18:08:27,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:08:27,926 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 18:08:27,936 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 18:08:28,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-21 18:08:28,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-21 18:08:28,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:08:28,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-12-21 18:08:28,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:08:28,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-12-21 18:08:28,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:08:28,795 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 18 treesize of output 20 [2021-12-21 18:08:28,802 INFO L353 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-21 18:08:28,803 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 17 treesize of output 17 [2021-12-21 18:08:28,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-21 18:08:28,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-21 18:08:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:28,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:08:29,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940479863] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:08:29,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:08:29,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 31 [2021-12-21 18:08:29,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187706523] [2021-12-21 18:08:29,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:08:29,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-21 18:08:29,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:29,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-21 18:08:29,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 18:08:29,270 INFO L87 Difference]: Start difference. First operand 7874 states and 10896 transitions. Second operand has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 28 states have internal predecessors, (106), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:08:31,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:31,063 INFO L93 Difference]: Finished difference Result 9715 states and 13603 transitions. [2021-12-21 18:08:31,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 18:08:31,063 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 28 states have internal predecessors, (106), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2021-12-21 18:08:31,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:31,075 INFO L225 Difference]: With dead ends: 9715 [2021-12-21 18:08:31,076 INFO L226 Difference]: Without dead ends: 9715 [2021-12-21 18:08:31,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=479, Invalid=2491, Unknown=0, NotChecked=0, Total=2970 [2021-12-21 18:08:31,076 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 2916 mSDsluCounter, 1968 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2917 SdHoareTripleChecker+Valid, 2102 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:31,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2917 Valid, 2102 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1532 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 18:08:31,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9715 states. [2021-12-21 18:08:31,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9715 to 7874. [2021-12-21 18:08:31,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7874 states, 7441 states have (on average 1.3601666442682434) internal successors, (10121), 7578 states have internal predecessors, (10121), 375 states have call successors, (375), 22 states have call predecessors, (375), 22 states have return successors, (375), 273 states have call predecessors, (375), 375 states have call successors, (375) [2021-12-21 18:08:31,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7874 states to 7874 states and 10871 transitions. [2021-12-21 18:08:31,182 INFO L78 Accepts]: Start accepts. Automaton has 7874 states and 10871 transitions. Word has length 57 [2021-12-21 18:08:31,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:31,183 INFO L470 AbstractCegarLoop]: Abstraction has 7874 states and 10871 transitions. [2021-12-21 18:08:31,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 28 states have internal predecessors, (106), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:08:31,183 INFO L276 IsEmpty]: Start isEmpty. Operand 7874 states and 10871 transitions. [2021-12-21 18:08:31,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 18:08:31,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:31,184 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:31,211 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 18:08:31,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:08:31,399 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:31,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:31,400 INFO L85 PathProgramCache]: Analyzing trace with hash 287950749, now seen corresponding path program 1 times [2021-12-21 18:08:31,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:31,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131680934] [2021-12-21 18:08:31,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:31,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:31,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:31,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:31,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:31,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131680934] [2021-12-21 18:08:31,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131680934] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:08:31,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201301687] [2021-12-21 18:08:31,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:31,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:08:31,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:08:31,439 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 18:08:31,470 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 18:08:31,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:31,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 18:08:31,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:08:31,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:31,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:08:31,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201301687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:31,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:08:31,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-12-21 18:08:31,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403823671] [2021-12-21 18:08:31,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:31,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:08:31,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:31,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:08:31,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:08:31,693 INFO L87 Difference]: Start difference. First operand 7874 states and 10871 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:31,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:31,729 INFO L93 Difference]: Finished difference Result 9093 states and 12467 transitions. [2021-12-21 18:08:31,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:08:31,729 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-12-21 18:08:31,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:31,742 INFO L225 Difference]: With dead ends: 9093 [2021-12-21 18:08:31,742 INFO L226 Difference]: Without dead ends: 9093 [2021-12-21 18:08:31,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:08:31,743 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 241 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:31,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 362 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:08:31,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9093 states. [2021-12-21 18:08:31,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9093 to 8618. [2021-12-21 18:08:31,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8618 states, 8159 states have (on average 1.3517587939698492) internal successors, (11029), 8296 states have internal predecessors, (11029), 401 states have call successors, (401), 22 states have call predecessors, (401), 22 states have return successors, (401), 299 states have call predecessors, (401), 401 states have call successors, (401) [2021-12-21 18:08:31,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8618 states to 8618 states and 11831 transitions. [2021-12-21 18:08:31,907 INFO L78 Accepts]: Start accepts. Automaton has 8618 states and 11831 transitions. Word has length 57 [2021-12-21 18:08:31,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:31,908 INFO L470 AbstractCegarLoop]: Abstraction has 8618 states and 11831 transitions. [2021-12-21 18:08:31,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:31,908 INFO L276 IsEmpty]: Start isEmpty. Operand 8618 states and 11831 transitions. [2021-12-21 18:08:31,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-21 18:08:31,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:31,909 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:31,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 18:08:32,136 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,SelfDestructingSolverStorable55 [2021-12-21 18:08:32,136 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:32,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:32,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1083931757, now seen corresponding path program 1 times [2021-12-21 18:08:32,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:32,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243213030] [2021-12-21 18:08:32,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:32,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:32,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:32,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:32,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 18:08:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:08:32,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:32,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243213030] [2021-12-21 18:08:32,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243213030] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:08:32,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48842514] [2021-12-21 18:08:32,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:32,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:08:32,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:08:32,696 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 18:08:32,697 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 18:08:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:32,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-21 18:08:32,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:08:33,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-21 18:08:33,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:08:33,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2021-12-21 18:08:33,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:08:33,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:08:33,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:08:33,454 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:08:33,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 64 [2021-12-21 18:08:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:33,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:08:34,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 106 [2021-12-21 18:08:34,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:08:34,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:08:34,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2021-12-21 18:08:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:08:34,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48842514] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:08:34,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:08:34,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 40 [2021-12-21 18:08:34,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679563957] [2021-12-21 18:08:34,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:08:34,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-21 18:08:34,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:34,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-21 18:08:34,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1433, Unknown=0, NotChecked=0, Total=1560 [2021-12-21 18:08:34,425 INFO L87 Difference]: Start difference. First operand 8618 states and 11831 transitions. Second operand has 40 states, 40 states have (on average 3.825) internal successors, (153), 40 states have internal predecessors, (153), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-21 18:08:37,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:37,239 INFO L93 Difference]: Finished difference Result 20915 states and 29556 transitions. [2021-12-21 18:08:37,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-21 18:08:37,239 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.825) internal successors, (153), 40 states have internal predecessors, (153), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 58 [2021-12-21 18:08:37,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:37,268 INFO L225 Difference]: With dead ends: 20915 [2021-12-21 18:08:37,268 INFO L226 Difference]: Without dead ends: 20901 [2021-12-21 18:08:37,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=937, Invalid=3893, Unknown=0, NotChecked=0, Total=4830 [2021-12-21 18:08:37,269 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 5610 mSDsluCounter, 4510 mSDsCounter, 0 mSdLazyCounter, 1945 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5610 SdHoareTripleChecker+Valid, 4786 SdHoareTripleChecker+Invalid, 2366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 1945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:37,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5610 Valid, 4786 Invalid, 2366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 1945 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 18:08:37,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20901 states. [2021-12-21 18:08:37,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20901 to 8618. [2021-12-21 18:08:37,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8618 states, 8159 states have (on average 1.3478367446991053) internal successors, (10997), 8296 states have internal predecessors, (10997), 401 states have call successors, (401), 22 states have call predecessors, (401), 22 states have return successors, (401), 299 states have call predecessors, (401), 401 states have call successors, (401) [2021-12-21 18:08:37,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8618 states to 8618 states and 11799 transitions. [2021-12-21 18:08:37,451 INFO L78 Accepts]: Start accepts. Automaton has 8618 states and 11799 transitions. Word has length 58 [2021-12-21 18:08:37,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:37,451 INFO L470 AbstractCegarLoop]: Abstraction has 8618 states and 11799 transitions. [2021-12-21 18:08:37,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.825) internal successors, (153), 40 states have internal predecessors, (153), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-21 18:08:37,452 INFO L276 IsEmpty]: Start isEmpty. Operand 8618 states and 11799 transitions. [2021-12-21 18:08:37,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-21 18:08:37,453 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:37,453 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:37,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 18:08:37,667 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,SelfDestructingSolverStorable56 [2021-12-21 18:08:37,667 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:37,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:37,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1844221281, now seen corresponding path program 1 times [2021-12-21 18:08:37,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:37,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254513916] [2021-12-21 18:08:37,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:37,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:38,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:38,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:38,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254513916] [2021-12-21 18:08:38,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254513916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:38,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:38,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-21 18:08:38,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361030979] [2021-12-21 18:08:38,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:38,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 18:08:38,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:38,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 18:08:38,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-21 18:08:38,139 INFO L87 Difference]: Start difference. First operand 8618 states and 11799 transitions. Second operand has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:39,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:39,097 INFO L93 Difference]: Finished difference Result 9937 states and 13792 transitions. [2021-12-21 18:08:39,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 18:08:39,099 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-12-21 18:08:39,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:39,114 INFO L225 Difference]: With dead ends: 9937 [2021-12-21 18:08:39,114 INFO L226 Difference]: Without dead ends: 9937 [2021-12-21 18:08:39,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2021-12-21 18:08:39,115 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 1453 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1455 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:39,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1455 Valid, 1191 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 18:08:39,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9937 states. [2021-12-21 18:08:39,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9937 to 8905. [2021-12-21 18:08:39,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8905 states, 8432 states have (on average 1.3478415559772297) internal successors, (11365), 8571 states have internal predecessors, (11365), 414 states have call successors, (414), 23 states have call predecessors, (414), 23 states have return successors, (414), 310 states have call predecessors, (414), 414 states have call successors, (414) [2021-12-21 18:08:39,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8905 states to 8905 states and 12193 transitions. [2021-12-21 18:08:39,244 INFO L78 Accepts]: Start accepts. Automaton has 8905 states and 12193 transitions. Word has length 59 [2021-12-21 18:08:39,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:39,245 INFO L470 AbstractCegarLoop]: Abstraction has 8905 states and 12193 transitions. [2021-12-21 18:08:39,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:39,245 INFO L276 IsEmpty]: Start isEmpty. Operand 8905 states and 12193 transitions. [2021-12-21 18:08:39,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-21 18:08:39,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:39,246 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:39,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-12-21 18:08:39,247 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:39,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:39,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1034874655, now seen corresponding path program 1 times [2021-12-21 18:08:39,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:39,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558900104] [2021-12-21 18:08:39,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:39,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:39,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:39,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:39,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558900104] [2021-12-21 18:08:39,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558900104] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:39,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:39,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 18:08:39,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454454735] [2021-12-21 18:08:39,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:39,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 18:08:39,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:39,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 18:08:39,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-21 18:08:39,541 INFO L87 Difference]: Start difference. First operand 8905 states and 12193 transitions. Second operand has 11 states, 10 states have (on average 5.7) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:40,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:40,021 INFO L93 Difference]: Finished difference Result 10964 states and 15193 transitions. [2021-12-21 18:08:40,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 18:08:40,022 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.7) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-12-21 18:08:40,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:40,041 INFO L225 Difference]: With dead ends: 10964 [2021-12-21 18:08:40,041 INFO L226 Difference]: Without dead ends: 10964 [2021-12-21 18:08:40,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-12-21 18:08:40,042 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 952 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 952 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:40,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [952 Valid, 874 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 18:08:40,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10964 states. [2021-12-21 18:08:40,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10964 to 9533. [2021-12-21 18:08:40,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9533 states, 9033 states have (on average 1.356138602900476) internal successors, (12250), 9176 states have internal predecessors, (12250), 439 states have call successors, (439), 25 states have call predecessors, (439), 25 states have return successors, (439), 331 states have call predecessors, (439), 439 states have call successors, (439) [2021-12-21 18:08:40,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9533 states to 9533 states and 13128 transitions. [2021-12-21 18:08:40,207 INFO L78 Accepts]: Start accepts. Automaton has 9533 states and 13128 transitions. Word has length 59 [2021-12-21 18:08:40,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:40,208 INFO L470 AbstractCegarLoop]: Abstraction has 9533 states and 13128 transitions. [2021-12-21 18:08:40,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.7) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:40,208 INFO L276 IsEmpty]: Start isEmpty. Operand 9533 states and 13128 transitions. [2021-12-21 18:08:40,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-21 18:08:40,212 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:40,212 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:40,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-12-21 18:08:40,212 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:40,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:40,213 INFO L85 PathProgramCache]: Analyzing trace with hash -2010992519, now seen corresponding path program 1 times [2021-12-21 18:08:40,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:40,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148624712] [2021-12-21 18:08:40,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:40,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:40,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:40,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:40,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 18:08:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:08:40,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:40,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148624712] [2021-12-21 18:08:40,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148624712] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:40,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:40,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 18:08:40,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880634858] [2021-12-21 18:08:40,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:40,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:08:40,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:40,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:08:40,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:08:40,341 INFO L87 Difference]: Start difference. First operand 9533 states and 13128 transitions. Second operand has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 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 18:08:40,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:40,518 INFO L93 Difference]: Finished difference Result 9615 states and 13160 transitions. [2021-12-21 18:08:40,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:08:40,519 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 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) Word has length 60 [2021-12-21 18:08:40,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:40,536 INFO L225 Difference]: With dead ends: 9615 [2021-12-21 18:08:40,537 INFO L226 Difference]: Without dead ends: 9615 [2021-12-21 18:08:40,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:08:40,537 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 430 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:40,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 384 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:08:40,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9615 states. [2021-12-21 18:08:40,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9615 to 9531. [2021-12-21 18:08:40,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9531 states, 9033 states have (on average 1.3468393667663014) internal successors, (12166), 9174 states have internal predecessors, (12166), 439 states have call successors, (439), 25 states have call predecessors, (439), 25 states have return successors, (439), 331 states have call predecessors, (439), 439 states have call successors, (439) [2021-12-21 18:08:40,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9531 states to 9531 states and 13044 transitions. [2021-12-21 18:08:40,660 INFO L78 Accepts]: Start accepts. Automaton has 9531 states and 13044 transitions. Word has length 60 [2021-12-21 18:08:40,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:40,661 INFO L470 AbstractCegarLoop]: Abstraction has 9531 states and 13044 transitions. [2021-12-21 18:08:40,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 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 18:08:40,661 INFO L276 IsEmpty]: Start isEmpty. Operand 9531 states and 13044 transitions. [2021-12-21 18:08:40,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-21 18:08:40,662 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:40,662 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:40,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-12-21 18:08:40,663 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:40,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:40,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1895327591, now seen corresponding path program 1 times [2021-12-21 18:08:40,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:40,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281849675] [2021-12-21 18:08:40,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:40,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:40,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:40,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:40,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 18:08:40,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:40,700 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 18:08:40,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:40,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281849675] [2021-12-21 18:08:40,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281849675] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:08:40,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:08:40,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:08:40,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695148234] [2021-12-21 18:08:40,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:08:40,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:08:40,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:40,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:08:40,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:08:40,702 INFO L87 Difference]: Start difference. First operand 9531 states and 13044 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:40,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:40,732 INFO L93 Difference]: Finished difference Result 9531 states and 12990 transitions. [2021-12-21 18:08:40,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:08:40,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-12-21 18:08:40,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:40,747 INFO L225 Difference]: With dead ends: 9531 [2021-12-21 18:08:40,748 INFO L226 Difference]: Without dead ends: 9531 [2021-12-21 18:08:40,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 18:08:40,748 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 0 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:40,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 308 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:08:40,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9531 states. [2021-12-21 18:08:40,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9531 to 9531. [2021-12-21 18:08:40,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9531 states, 9033 states have (on average 1.3408612863943319) internal successors, (12112), 9174 states have internal predecessors, (12112), 439 states have call successors, (439), 25 states have call predecessors, (439), 25 states have return successors, (439), 331 states have call predecessors, (439), 439 states have call successors, (439) [2021-12-21 18:08:40,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9531 states to 9531 states and 12990 transitions. [2021-12-21 18:08:40,872 INFO L78 Accepts]: Start accepts. Automaton has 9531 states and 12990 transitions. Word has length 60 [2021-12-21 18:08:40,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:40,873 INFO L470 AbstractCegarLoop]: Abstraction has 9531 states and 12990 transitions. [2021-12-21 18:08:40,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:08:40,873 INFO L276 IsEmpty]: Start isEmpty. Operand 9531 states and 12990 transitions. [2021-12-21 18:08:40,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-21 18:08:40,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:40,875 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:40,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-12-21 18:08:40,875 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-21 18:08:40,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:08:40,875 INFO L85 PathProgramCache]: Analyzing trace with hash -25117949, now seen corresponding path program 1 times [2021-12-21 18:08:40,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:08:40,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581420201] [2021-12-21 18:08:40,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:40,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:08:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:40,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 18:08:40,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:40,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:08:40,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581420201] [2021-12-21 18:08:40,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581420201] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:08:40,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759726286] [2021-12-21 18:08:40,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:08:40,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:08:40,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:08:40,950 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 18:08:40,975 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 18:08:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:08:41,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 18:08:41,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:08:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:41,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:08:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:08:41,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759726286] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:08:41,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:08:41,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2021-12-21 18:08:41,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537517381] [2021-12-21 18:08:41,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:08:41,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:08:41,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:08:41,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:08:41,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:08:41,323 INFO L87 Difference]: Start difference. First operand 9531 states and 12990 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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 18:08:41,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:08:41,408 INFO L93 Difference]: Finished difference Result 21124 states and 28459 transitions. [2021-12-21 18:08:41,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:08:41,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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) Word has length 62 [2021-12-21 18:08:41,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:08:41,447 INFO L225 Difference]: With dead ends: 21124 [2021-12-21 18:08:41,448 INFO L226 Difference]: Without dead ends: 21124 [2021-12-21 18:08:41,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:08:41,448 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 358 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:08:41,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 838 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:08:41,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21124 states. [2021-12-21 18:08:41,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21124 to 15627. [2021-12-21 18:08:41,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15627 states, 14841 states have (on average 1.3247085775891112) internal successors, (19660), 15010 states have internal predecessors, (19660), 727 states have call successors, (727), 25 states have call predecessors, (727), 25 states have return successors, (727), 591 states have call predecessors, (727), 727 states have call successors, (727) [2021-12-21 18:08:41,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15627 states to 15627 states and 21114 transitions. [2021-12-21 18:08:41,704 INFO L78 Accepts]: Start accepts. Automaton has 15627 states and 21114 transitions. Word has length 62 [2021-12-21 18:08:41,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:08:41,704 INFO L470 AbstractCegarLoop]: Abstraction has 15627 states and 21114 transitions. [2021-12-21 18:08:41,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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 18:08:41,705 INFO L276 IsEmpty]: Start isEmpty. Operand 15627 states and 21114 transitions. [2021-12-21 18:08:41,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-21 18:08:41,706 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:08:41,706 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:08:41,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0