./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/eureka_01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/AutomizerReach.xml -i ../sv-benchmarks/c/loops/eureka_01-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a7ef5e9072271cbf0486c6be0aa2bd26b235c6b4341d8940adfe18a5a48a6524 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 00:00:36,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 00:00:36,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 00:00:36,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 00:00:36,707 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 00:00:36,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 00:00:36,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 00:00:36,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 00:00:36,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 00:00:36,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 00:00:36,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 00:00:36,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 00:00:36,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 00:00:36,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 00:00:36,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 00:00:36,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 00:00:36,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 00:00:36,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 00:00:36,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 00:00:36,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 00:00:36,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 00:00:36,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 00:00:36,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 00:00:36,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 00:00:36,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 00:00:36,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 00:00:36,744 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 00:00:36,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 00:00:36,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 00:00:36,747 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 00:00:36,747 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 00:00:36,748 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 00:00:36,749 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 00:00:36,750 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 00:00:36,751 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 00:00:36,751 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 00:00:36,751 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 00:00:36,752 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 00:00:36,752 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 00:00:36,752 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 00:00:36,753 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 00:00:36,754 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 00:00:36,780 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 00:00:36,780 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 00:00:36,781 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 00:00:36,781 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 00:00:36,782 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 00:00:36,782 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 00:00:36,782 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 00:00:36,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 00:00:36,783 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 00:00:36,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 00:00:36,784 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 00:00:36,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 00:00:36,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 00:00:36,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 00:00:36,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 00:00:36,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 00:00:36,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 00:00:36,785 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 00:00:36,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 00:00:36,785 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 00:00:36,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 00:00:36,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 00:00:36,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 00:00:36,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 00:00:36,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 00:00:36,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 00:00:36,786 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 00:00:36,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 00:00:36,787 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 00:00:36,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 00:00:36,787 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 00:00:36,787 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 00:00:36,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 00:00:36,788 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 00:00:36,788 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7ef5e9072271cbf0486c6be0aa2bd26b235c6b4341d8940adfe18a5a48a6524 [2021-12-16 00:00:37,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 00:00:37,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 00:00:37,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 00:00:37,041 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 00:00:37,041 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 00:00:37,043 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/eureka_01-1.c [2021-12-16 00:00:37,106 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19243bd77/aec51d5e0bf04217925aebec6e074646/FLAG50d583849 [2021-12-16 00:00:37,466 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 00:00:37,467 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/eureka_01-1.c [2021-12-16 00:00:37,476 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19243bd77/aec51d5e0bf04217925aebec6e074646/FLAG50d583849 [2021-12-16 00:00:37,884 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19243bd77/aec51d5e0bf04217925aebec6e074646 [2021-12-16 00:00:37,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 00:00:37,887 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 00:00:37,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 00:00:37,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 00:00:37,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 00:00:37,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:00:37" (1/1) ... [2021-12-16 00:00:37,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61ac39f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:00:37, skipping insertion in model container [2021-12-16 00:00:37,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:00:37" (1/1) ... [2021-12-16 00:00:37,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 00:00:37,906 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 00:00:38,031 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/eureka_01-1.c[446,459] [2021-12-16 00:00:38,056 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 00:00:38,061 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 00:00:38,069 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/eureka_01-1.c[446,459] [2021-12-16 00:00:38,082 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 00:00:38,091 INFO L208 MainTranslator]: Completed translation [2021-12-16 00:00:38,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:00:38 WrapperNode [2021-12-16 00:00:38,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 00:00:38,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 00:00:38,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 00:00:38,093 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 00:00:38,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:00:38" (1/1) ... [2021-12-16 00:00:38,104 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:00:38" (1/1) ... [2021-12-16 00:00:38,134 INFO L137 Inliner]: procedures = 15, calls = 98, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 205 [2021-12-16 00:00:38,135 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 00:00:38,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 00:00:38,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 00:00:38,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 00:00:38,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:00:38" (1/1) ... [2021-12-16 00:00:38,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:00:38" (1/1) ... [2021-12-16 00:00:38,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:00:38" (1/1) ... [2021-12-16 00:00:38,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:00:38" (1/1) ... [2021-12-16 00:00:38,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:00:38" (1/1) ... [2021-12-16 00:00:38,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:00:38" (1/1) ... [2021-12-16 00:00:38,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:00:38" (1/1) ... [2021-12-16 00:00:38,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 00:00:38,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 00:00:38,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 00:00:38,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 00:00:38,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:00:38" (1/1) ... [2021-12-16 00:00:38,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 00:00:38,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:00:38,198 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) [2021-12-16 00:00:38,211 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 [2021-12-16 00:00:38,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 00:00:38,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 00:00:38,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 00:00:38,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 00:00:38,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 00:00:38,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 00:00:38,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 00:00:38,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 00:00:38,272 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 00:00:38,274 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 00:00:38,426 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 00:00:38,431 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 00:00:38,431 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-16 00:00:38,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:00:38 BoogieIcfgContainer [2021-12-16 00:00:38,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 00:00:38,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 00:00:38,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 00:00:38,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 00:00:38,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 12:00:37" (1/3) ... [2021-12-16 00:00:38,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@764a2705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:00:38, skipping insertion in model container [2021-12-16 00:00:38,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:00:38" (2/3) ... [2021-12-16 00:00:38,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@764a2705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:00:38, skipping insertion in model container [2021-12-16 00:00:38,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:00:38" (3/3) ... [2021-12-16 00:00:38,439 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-1.c [2021-12-16 00:00:38,442 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 00:00:38,443 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 00:00:38,474 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 00:00:38,486 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-12-16 00:00:38,487 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 00:00:38,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:38,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 00:00:38,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:00:38,529 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:00:38,530 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:00:38,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:00:38,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1963003136, now seen corresponding path program 1 times [2021-12-16 00:00:38,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:00:38,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655770743] [2021-12-16 00:00:38,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:00:38,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:00:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:00:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:00:38,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:00:38,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655770743] [2021-12-16 00:00:38,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655770743] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:00:38,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:00:38,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 00:00:38,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845876640] [2021-12-16 00:00:38,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:00:38,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:00:38,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:00:38,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:00:38,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 00:00:38,808 INFO L87 Difference]: Start difference. First operand has 28 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:38,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:00:38,912 INFO L93 Difference]: Finished difference Result 89 states and 135 transitions. [2021-12-16 00:00:38,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:00:38,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-12-16 00:00:38,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:00:38,921 INFO L225 Difference]: With dead ends: 89 [2021-12-16 00:00:38,921 INFO L226 Difference]: Without dead ends: 42 [2021-12-16 00:00:38,926 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 [2021-12-16 00:00:38,931 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 56 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:00:38,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 67 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:00:38,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-16 00:00:38,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 26. [2021-12-16 00:00:38,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:38,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-12-16 00:00:38,962 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 13 [2021-12-16 00:00:38,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:00:38,963 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-12-16 00:00:38,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:38,963 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-12-16 00:00:38,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-16 00:00:38,964 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:00:38,964 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:00:38,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 00:00:38,965 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:00:38,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:00:38,968 INFO L85 PathProgramCache]: Analyzing trace with hash 629591390, now seen corresponding path program 1 times [2021-12-16 00:00:38,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:00:38,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631837084] [2021-12-16 00:00:38,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:00:38,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:00:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:00:39,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:00:39,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:00:39,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631837084] [2021-12-16 00:00:39,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631837084] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:00:39,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515848949] [2021-12-16 00:00:39,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:00:39,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:00:39,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:00:39,168 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) [2021-12-16 00:00:39,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 00:00:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:00:39,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-16 00:00:39,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:00:39,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 00:00:39,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 00:00:39,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:00:39,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:00:39,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-12-16 00:00:39,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-12-16 00:00:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:00:39,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515848949] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:00:39,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:00:39,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-12-16 00:00:39,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859728012] [2021-12-16 00:00:39,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:00:39,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 00:00:39,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:00:39,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 00:00:39,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-12-16 00:00:39,631 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:39,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:00:39,790 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2021-12-16 00:00:39,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 00:00:39,791 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-16 00:00:39,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:00:39,795 INFO L225 Difference]: With dead ends: 84 [2021-12-16 00:00:39,795 INFO L226 Difference]: Without dead ends: 82 [2021-12-16 00:00:39,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-16 00:00:39,798 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:00:39,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 145 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:00:39,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-16 00:00:39,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 43. [2021-12-16 00:00:39,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:39,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2021-12-16 00:00:39,805 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 19 [2021-12-16 00:00:39,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:00:39,806 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2021-12-16 00:00:39,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:39,806 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2021-12-16 00:00:39,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-16 00:00:39,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:00:39,806 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:00:39,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 00:00:40,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:00:40,026 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:00:40,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:00:40,027 INFO L85 PathProgramCache]: Analyzing trace with hash -381525860, now seen corresponding path program 1 times [2021-12-16 00:00:40,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:00:40,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51930390] [2021-12-16 00:00:40,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:00:40,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:00:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:00:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:00:40,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:00:40,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51930390] [2021-12-16 00:00:40,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51930390] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:00:40,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:00:40,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 00:00:40,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212816325] [2021-12-16 00:00:40,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:00:40,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 00:00:40,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:00:40,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 00:00:40,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 00:00:40,074 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:40,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:00:40,113 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2021-12-16 00:00:40,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 00:00:40,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-16 00:00:40,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:00:40,114 INFO L225 Difference]: With dead ends: 66 [2021-12-16 00:00:40,114 INFO L226 Difference]: Without dead ends: 45 [2021-12-16 00:00:40,115 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 [2021-12-16 00:00:40,115 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:00:40,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 39 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:00:40,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-16 00:00:40,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-12-16 00:00:40,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:40,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-12-16 00:00:40,119 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 19 [2021-12-16 00:00:40,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:00:40,119 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-12-16 00:00:40,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:40,119 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2021-12-16 00:00:40,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-16 00:00:40,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:00:40,120 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] [2021-12-16 00:00:40,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 00:00:40,120 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:00:40,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:00:40,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1960843935, now seen corresponding path program 1 times [2021-12-16 00:00:40,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:00:40,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350478205] [2021-12-16 00:00:40,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:00:40,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:00:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:00:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:00:40,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:00:40,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350478205] [2021-12-16 00:00:40,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350478205] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:00:40,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193114788] [2021-12-16 00:00:40,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:00:40,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:00:40,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:00:40,170 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) [2021-12-16 00:00:40,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 00:00:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:00:40,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 00:00:40,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:00:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:00:40,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:00:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:00:40,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193114788] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:00:40,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:00:40,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2021-12-16 00:00:40,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303941662] [2021-12-16 00:00:40,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:00:40,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 00:00:40,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:00:40,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 00:00:40,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:00:40,320 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:40,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:00:40,415 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2021-12-16 00:00:40,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 00:00:40,415 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-16 00:00:40,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:00:40,416 INFO L225 Difference]: With dead ends: 114 [2021-12-16 00:00:40,416 INFO L226 Difference]: Without dead ends: 86 [2021-12-16 00:00:40,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-16 00:00:40,417 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 69 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:00:40,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 141 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:00:40,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-16 00:00:40,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2021-12-16 00:00:40,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.309090909090909) internal successors, (72), 55 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:40,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2021-12-16 00:00:40,423 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 22 [2021-12-16 00:00:40,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:00:40,423 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2021-12-16 00:00:40,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:40,423 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2021-12-16 00:00:40,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-16 00:00:40,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:00:40,424 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] [2021-12-16 00:00:40,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 00:00:40,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-16 00:00:40,642 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:00:40,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:00:40,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1926841972, now seen corresponding path program 1 times [2021-12-16 00:00:40,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:00:40,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202987197] [2021-12-16 00:00:40,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:00:40,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:00:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:00:40,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:00:40,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:00:40,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202987197] [2021-12-16 00:00:40,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202987197] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:00:40,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553123896] [2021-12-16 00:00:40,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:00:40,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:00:40,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:00:40,703 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) [2021-12-16 00:00:40,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 00:00:40,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:00:40,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 00:00:40,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:00:40,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:00:40,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:00:40,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:00:40,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553123896] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:00:40,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:00:40,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-16 00:00:40,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127246301] [2021-12-16 00:00:40,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:00:40,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 00:00:40,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:00:40,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 00:00:40,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-16 00:00:40,886 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:41,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:00:41,047 INFO L93 Difference]: Finished difference Result 181 states and 231 transitions. [2021-12-16 00:00:41,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 00:00:41,048 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-16 00:00:41,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:00:41,052 INFO L225 Difference]: With dead ends: 181 [2021-12-16 00:00:41,052 INFO L226 Difference]: Without dead ends: 159 [2021-12-16 00:00:41,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-12-16 00:00:41,054 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 164 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:00:41,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 155 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:00:41,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-16 00:00:41,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 75. [2021-12-16 00:00:41,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.3243243243243243) internal successors, (98), 74 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:41,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-12-16 00:00:41,069 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 22 [2021-12-16 00:00:41,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:00:41,069 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-12-16 00:00:41,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:41,069 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-12-16 00:00:41,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-16 00:00:41,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:00:41,070 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:00:41,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 00:00:41,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:00:41,271 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:00:41,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:00:41,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1234267636, now seen corresponding path program 1 times [2021-12-16 00:00:41,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:00:41,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222808692] [2021-12-16 00:00:41,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:00:41,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:00:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:00:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:00:41,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:00:41,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222808692] [2021-12-16 00:00:41,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222808692] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:00:41,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698507148] [2021-12-16 00:00:41,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:00:41,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:00:41,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:00:41,328 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) [2021-12-16 00:00:41,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 00:00:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:00:41,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 00:00:41,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:00:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:00:41,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:00:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:00:41,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698507148] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:00:41,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:00:41,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-16 00:00:41,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490212925] [2021-12-16 00:00:41,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:00:41,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 00:00:41,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:00:41,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 00:00:41,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-16 00:00:41,514 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:41,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:00:41,617 INFO L93 Difference]: Finished difference Result 206 states and 263 transitions. [2021-12-16 00:00:41,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 00:00:41,617 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-16 00:00:41,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:00:41,618 INFO L225 Difference]: With dead ends: 206 [2021-12-16 00:00:41,618 INFO L226 Difference]: Without dead ends: 146 [2021-12-16 00:00:41,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-16 00:00:41,619 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 95 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:00:41,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 101 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:00:41,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-16 00:00:41,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 92. [2021-12-16 00:00:41,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.3076923076923077) internal successors, (119), 91 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:41,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 119 transitions. [2021-12-16 00:00:41,627 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 119 transitions. Word has length 23 [2021-12-16 00:00:41,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:00:41,629 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 119 transitions. [2021-12-16 00:00:41,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:41,630 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 119 transitions. [2021-12-16 00:00:41,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 00:00:41,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:00:41,630 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] [2021-12-16 00:00:41,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 00:00:41,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:00:41,839 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:00:41,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:00:41,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1741027445, now seen corresponding path program 1 times [2021-12-16 00:00:41,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:00:41,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398215883] [2021-12-16 00:00:41,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:00:41,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:00:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:00:42,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:00:42,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:00:42,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398215883] [2021-12-16 00:00:42,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398215883] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:00:42,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397393090] [2021-12-16 00:00:42,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:00:42,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:00:42,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:00:42,149 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) [2021-12-16 00:00:42,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 00:00:42,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:00:42,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-16 00:00:42,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:00:42,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-16 00:00:42,289 INFO L388 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 19 treesize of output 18 [2021-12-16 00:00:42,417 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-16 00:00:42,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2021-12-16 00:00:42,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-12-16 00:00:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:00:42,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:00:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:00:42,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397393090] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:00:42,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:00:42,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 24 [2021-12-16 00:00:42,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521156778] [2021-12-16 00:00:42,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:00:42,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-16 00:00:42,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:00:42,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-16 00:00:42,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-12-16 00:00:42,811 INFO L87 Difference]: Start difference. First operand 92 states and 119 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:43,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:00:43,225 INFO L93 Difference]: Finished difference Result 190 states and 235 transitions. [2021-12-16 00:00:43,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-16 00:00:43,225 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-16 00:00:43,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:00:43,227 INFO L225 Difference]: With dead ends: 190 [2021-12-16 00:00:43,227 INFO L226 Difference]: Without dead ends: 176 [2021-12-16 00:00:43,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=374, Invalid=958, Unknown=0, NotChecked=0, Total=1332 [2021-12-16 00:00:43,228 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 306 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:00:43,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 293 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 236 Invalid, 0 Unknown, 138 Unchecked, 0.1s Time] [2021-12-16 00:00:43,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-16 00:00:43,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 96. [2021-12-16 00:00:43,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.3263157894736841) internal successors, (126), 95 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:43,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2021-12-16 00:00:43,237 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 25 [2021-12-16 00:00:43,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:00:43,237 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2021-12-16 00:00:43,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:43,237 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2021-12-16 00:00:43,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 00:00:43,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:00:43,238 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] [2021-12-16 00:00:43,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 00:00:43,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:00:43,456 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:00:43,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:00:43,456 INFO L85 PathProgramCache]: Analyzing trace with hash -858936254, now seen corresponding path program 2 times [2021-12-16 00:00:43,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:00:43,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182309450] [2021-12-16 00:00:43,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:00:43,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:00:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:00:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 00:00:43,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:00:43,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182309450] [2021-12-16 00:00:43,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182309450] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:00:43,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730378527] [2021-12-16 00:00:43,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 00:00:43,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:00:43,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:00:43,544 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) [2021-12-16 00:00:43,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 00:00:43,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 00:00:43,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:00:43,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 00:00:43,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:00:43,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 00:00:43,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 00:00:43,662 INFO L388 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 23 treesize of output 22 [2021-12-16 00:00:43,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 00:00:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 00:00:43,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:00:45,811 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_66| Int)) (or (forall ((v_ArrVal_253 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) (+ |c_ULTIMATE.start_main_~#distance~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_66| 4)) v_ArrVal_253) |c_ULTIMATE.start_main_~#distance~0#1.offset|))) (< |v_ULTIMATE.start_main_~i~0#1_66| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-16 00:00:45,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2021-12-16 00:00:45,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 150 [2021-12-16 00:00:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 1 not checked. [2021-12-16 00:00:45,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730378527] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:00:45,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:00:45,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2021-12-16 00:00:45,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847439694] [2021-12-16 00:00:45,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:00:45,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 00:00:45,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:00:45,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 00:00:45,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=159, Unknown=1, NotChecked=26, Total=240 [2021-12-16 00:00:45,924 INFO L87 Difference]: Start difference. First operand 96 states and 126 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:47,947 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~#distance~0#1.offset| 0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) 0) (= |c_ULTIMATE.start_main_~i~0#1| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_66| Int)) (or (forall ((v_ArrVal_253 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) (+ |c_ULTIMATE.start_main_~#distance~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_66| 4)) v_ArrVal_253) |c_ULTIMATE.start_main_~#distance~0#1.offset|))) (< |v_ULTIMATE.start_main_~i~0#1_66| (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) is different from false [2021-12-16 00:00:48,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:00:48,106 INFO L93 Difference]: Finished difference Result 214 states and 277 transitions. [2021-12-16 00:00:48,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-16 00:00:48,107 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-16 00:00:48,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:00:48,108 INFO L225 Difference]: With dead ends: 214 [2021-12-16 00:00:48,108 INFO L226 Difference]: Without dead ends: 212 [2021-12-16 00:00:48,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=118, Invalid=350, Unknown=2, NotChecked=82, Total=552 [2021-12-16 00:00:48,108 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 96 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:00:48,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 193 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 199 Invalid, 0 Unknown, 133 Unchecked, 0.1s Time] [2021-12-16 00:00:48,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-16 00:00:48,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 119. [2021-12-16 00:00:48,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.3559322033898304) internal successors, (160), 118 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2021-12-16 00:00:48,116 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 25 [2021-12-16 00:00:48,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:00:48,117 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2021-12-16 00:00:48,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:48,117 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2021-12-16 00:00:48,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 00:00:48,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:00:48,118 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] [2021-12-16 00:00:48,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 00:00:48,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:00:48,323 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:00:48,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:00:48,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1096380170, now seen corresponding path program 2 times [2021-12-16 00:00:48,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:00:48,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83938085] [2021-12-16 00:00:48,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:00:48,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:00:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:00:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:00:48,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:00:48,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83938085] [2021-12-16 00:00:48,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83938085] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:00:48,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684310524] [2021-12-16 00:00:48,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 00:00:48,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:00:48,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:00:48,369 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) [2021-12-16 00:00:48,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 00:00:48,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 00:00:48,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:00:48,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 00:00:48,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:00:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:00:48,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:00:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:00:48,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684310524] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:00:48,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:00:48,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-16 00:00:48,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260443673] [2021-12-16 00:00:48,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:00:48,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 00:00:48,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:00:48,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 00:00:48,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-16 00:00:48,566 INFO L87 Difference]: Start difference. First operand 119 states and 160 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:48,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:00:48,678 INFO L93 Difference]: Finished difference Result 234 states and 298 transitions. [2021-12-16 00:00:48,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 00:00:48,678 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-16 00:00:48,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:00:48,679 INFO L225 Difference]: With dead ends: 234 [2021-12-16 00:00:48,680 INFO L226 Difference]: Without dead ends: 221 [2021-12-16 00:00:48,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-12-16 00:00:48,681 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 108 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:00:48,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 185 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:00:48,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-16 00:00:48,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2021-12-16 00:00:48,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.3478260869565217) internal successors, (217), 161 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:48,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 217 transitions. [2021-12-16 00:00:48,689 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 217 transitions. Word has length 28 [2021-12-16 00:00:48,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:00:48,690 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 217 transitions. [2021-12-16 00:00:48,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:48,690 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 217 transitions. [2021-12-16 00:00:48,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 00:00:48,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:00:48,691 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:00:48,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 00:00:48,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:00:48,908 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:00:48,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:00:48,908 INFO L85 PathProgramCache]: Analyzing trace with hash -483995622, now seen corresponding path program 3 times [2021-12-16 00:00:48,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:00:48,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183048911] [2021-12-16 00:00:48,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:00:48,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:00:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:00:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 00:00:48,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:00:48,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183048911] [2021-12-16 00:00:48,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183048911] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:00:48,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098205485] [2021-12-16 00:00:48,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 00:00:48,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:00:48,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:00:48,936 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) [2021-12-16 00:00:48,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 00:00:49,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-16 00:00:49,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:00:49,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 00:00:49,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:00:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:00:49,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:00:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:00:49,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098205485] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:00:49,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:00:49,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9, 9] total 14 [2021-12-16 00:00:49,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447398132] [2021-12-16 00:00:49,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:00:49,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 00:00:49,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:00:49,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 00:00:49,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-12-16 00:00:49,166 INFO L87 Difference]: Start difference. First operand 162 states and 217 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:00:49,411 INFO L93 Difference]: Finished difference Result 419 states and 547 transitions. [2021-12-16 00:00:49,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 00:00:49,412 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-16 00:00:49,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:00:49,413 INFO L225 Difference]: With dead ends: 419 [2021-12-16 00:00:49,413 INFO L226 Difference]: Without dead ends: 289 [2021-12-16 00:00:49,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-12-16 00:00:49,414 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 219 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:00:49,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 285 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:00:49,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-12-16 00:00:49,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 142. [2021-12-16 00:00:49,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.297872340425532) internal successors, (183), 141 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:49,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 183 transitions. [2021-12-16 00:00:49,422 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 183 transitions. Word has length 28 [2021-12-16 00:00:49,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:00:49,422 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 183 transitions. [2021-12-16 00:00:49,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:49,422 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 183 transitions. [2021-12-16 00:00:49,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-16 00:00:49,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:00:49,423 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:00:49,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 00:00:49,638 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,SelfDestructingSolverStorable9 [2021-12-16 00:00:49,639 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:00:49,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:00:49,639 INFO L85 PathProgramCache]: Analyzing trace with hash 583416536, now seen corresponding path program 1 times [2021-12-16 00:00:49,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:00:49,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838749633] [2021-12-16 00:00:49,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:00:49,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:00:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:00:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 00:00:49,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:00:49,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838749633] [2021-12-16 00:00:49,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838749633] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:00:49,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144892106] [2021-12-16 00:00:49,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:00:49,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:00:49,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:00:49,738 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) [2021-12-16 00:00:49,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 00:00:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:00:49,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 00:00:49,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:00:49,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 00:00:49,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 00:00:49,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 00:00:49,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:00:49,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-16 00:00:50,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-12-16 00:00:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 00:00:50,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144892106] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:00:50,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:00:50,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2021-12-16 00:00:50,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809561265] [2021-12-16 00:00:50,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:00:50,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 00:00:50,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:00:50,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 00:00:50,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-12-16 00:00:50,076 INFO L87 Difference]: Start difference. First operand 142 states and 183 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:50,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:00:50,427 INFO L93 Difference]: Finished difference Result 274 states and 346 transitions. [2021-12-16 00:00:50,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 00:00:50,427 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-16 00:00:50,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:00:50,428 INFO L225 Difference]: With dead ends: 274 [2021-12-16 00:00:50,429 INFO L226 Difference]: Without dead ends: 272 [2021-12-16 00:00:50,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-12-16 00:00:50,430 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 209 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 00:00:50,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 285 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 00:00:50,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-16 00:00:50,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 191. [2021-12-16 00:00:50,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.3) internal successors, (247), 190 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:50,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 247 transitions. [2021-12-16 00:00:50,440 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 247 transitions. Word has length 29 [2021-12-16 00:00:50,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:00:50,440 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 247 transitions. [2021-12-16 00:00:50,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:50,440 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 247 transitions. [2021-12-16 00:00:50,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-16 00:00:50,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:00:50,441 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:00:50,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 00:00:50,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:00:50,646 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:00:50,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:00:50,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1240772930, now seen corresponding path program 3 times [2021-12-16 00:00:50,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:00:50,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140732225] [2021-12-16 00:00:50,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:00:50,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:00:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:00:51,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:00:51,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:00:51,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140732225] [2021-12-16 00:00:51,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140732225] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:00:51,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626001884] [2021-12-16 00:00:51,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 00:00:51,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:00:51,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:00:51,027 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) [2021-12-16 00:00:51,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 00:00:51,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-16 00:00:51,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:00:51,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-16 00:00:51,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:00:51,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-16 00:00:51,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 00:00:51,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-12-16 00:00:51,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 00:00:51,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 00:00:51,348 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-16 00:00:51,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 51 [2021-12-16 00:00:51,444 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-16 00:00:51,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 45 [2021-12-16 00:00:51,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-12-16 00:00:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 00:00:51,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:00:54,314 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1_23| Int)) (or (forall ((v_ArrVal_421 Int) (v_ArrVal_420 Int)) (<= 0 (select (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) (+ (* |v_ULTIMATE.start_main_~x~0#1_23| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) v_ArrVal_420))) (store .cse0 (+ |c_ULTIMATE.start_main_~#distance~0#1.offset| (* (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse0) |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ (* |c_ULTIMATE.start_main_~j~0#1| 4) |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4)) 4)) v_ArrVal_421)) |c_ULTIMATE.start_main_~#distance~0#1.offset|))) (< |v_ULTIMATE.start_main_~x~0#1_23| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ (* |c_ULTIMATE.start_main_~j~0#1| 4) |c_ULTIMATE.start_main_~#Dest~0#1.offset|))))) is different from false [2021-12-16 00:00:54,977 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_421 Int) (v_ArrVal_420 Int) (|v_ULTIMATE.start_main_~x~0#1_23| Int)) (or (<= 0 (select (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) (+ (* |v_ULTIMATE.start_main_~x~0#1_23| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) v_ArrVal_420))) (store .cse0 (+ |c_ULTIMATE.start_main_~#distance~0#1.offset| (* (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse0) |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4)) 4)) v_ArrVal_421)) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (< |v_ULTIMATE.start_main_~x~0#1_23| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Dest~0#1.base|) |c_ULTIMATE.start_main_~#Dest~0#1.offset|)))) is different from false [2021-12-16 00:00:57,029 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_421 Int) (v_ArrVal_420 Int) (|v_ULTIMATE.start_main_~x~0#1_23| Int) (v_ArrVal_418 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) v_ArrVal_418))) (or (< |v_ULTIMATE.start_main_~x~0#1_23| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse0) |c_ULTIMATE.start_main_~#Dest~0#1.base|) |c_ULTIMATE.start_main_~#Dest~0#1.offset|)) (<= 0 (select (let ((.cse1 (store .cse0 (+ (* |v_ULTIMATE.start_main_~x~0#1_23| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) v_ArrVal_420))) (store .cse1 (+ |c_ULTIMATE.start_main_~#distance~0#1.offset| (* (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse1) |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4)) 4)) v_ArrVal_421)) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (< v_ArrVal_418 0)))) is different from false [2021-12-16 00:00:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 4 not checked. [2021-12-16 00:00:57,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626001884] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:00:57,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:00:57,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 12] total 32 [2021-12-16 00:00:57,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438114410] [2021-12-16 00:00:57,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:00:57,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-16 00:00:57,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:00:57,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-16 00:00:57,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=674, Unknown=4, NotChecked=168, Total=992 [2021-12-16 00:00:57,071 INFO L87 Difference]: Start difference. First operand 191 states and 247 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:00:57,558 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~#Dest~0#1.base|))) (and (= |c_ULTIMATE.start_main_~#distance~0#1.offset| 0) (forall ((v_ArrVal_421 Int) (v_ArrVal_420 Int) (|v_ULTIMATE.start_main_~x~0#1_23| Int)) (or (<= 0 (select (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) (+ (* |v_ULTIMATE.start_main_~x~0#1_23| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) v_ArrVal_420))) (store .cse0 (+ |c_ULTIMATE.start_main_~#distance~0#1.offset| (* (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse0) |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4)) 4)) v_ArrVal_421)) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (< |v_ULTIMATE.start_main_~x~0#1_23| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Dest~0#1.base|) |c_ULTIMATE.start_main_~#Dest~0#1.offset|)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) 0) (= (select .cse1 |c_ULTIMATE.start_main_~#Dest~0#1.offset|) 1) (= (select .cse1 (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4)) 3) (= |c_ULTIMATE.start_main_~i~0#1| 0) (= 0 |c_ULTIMATE.start_main_~#Dest~0#1.offset|))) is different from false [2021-12-16 00:00:58,026 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~#Dest~0#1.base|))) (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) 0) 0) (= |c_ULTIMATE.start_main_~#distance~0#1.offset| 0) (forall ((v_ArrVal_421 Int) (v_ArrVal_420 Int) (|v_ULTIMATE.start_main_~x~0#1_23| Int)) (or (<= 0 (select (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) (+ (* |v_ULTIMATE.start_main_~x~0#1_23| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) v_ArrVal_420))) (store .cse0 (+ |c_ULTIMATE.start_main_~#distance~0#1.offset| (* (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse0) |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4)) 4)) v_ArrVal_421)) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (< |v_ULTIMATE.start_main_~x~0#1_23| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Dest~0#1.base|) |c_ULTIMATE.start_main_~#Dest~0#1.offset|)))) (= (select .cse1 |c_ULTIMATE.start_main_~#Dest~0#1.offset|) 1) (= (select .cse1 (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4)) 3) (= 0 |c_ULTIMATE.start_main_~#Dest~0#1.offset|))) is different from false [2021-12-16 00:01:00,031 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#Dest~0#1.base|))) (and (= |c_ULTIMATE.start_main_~j~0#1| 0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) 0) 0) (= |c_ULTIMATE.start_main_~#distance~0#1.offset| 0) (= (select .cse0 (+ (* |c_ULTIMATE.start_main_~j~0#1| 4) |c_ULTIMATE.start_main_~#Dest~0#1.offset|)) 1) (forall ((|v_ULTIMATE.start_main_~x~0#1_23| Int)) (or (forall ((v_ArrVal_421 Int) (v_ArrVal_420 Int)) (<= 0 (select (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) (+ (* |v_ULTIMATE.start_main_~x~0#1_23| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) v_ArrVal_420))) (store .cse1 (+ |c_ULTIMATE.start_main_~#distance~0#1.offset| (* (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse1) |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ (* |c_ULTIMATE.start_main_~j~0#1| 4) |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4)) 4)) v_ArrVal_421)) |c_ULTIMATE.start_main_~#distance~0#1.offset|))) (< |v_ULTIMATE.start_main_~x~0#1_23| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ (* |c_ULTIMATE.start_main_~j~0#1| 4) |c_ULTIMATE.start_main_~#Dest~0#1.offset|))))) (= (select .cse0 (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4)) 3) (= 0 |c_ULTIMATE.start_main_~#Dest~0#1.offset|))) is different from false [2021-12-16 00:01:00,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:01:00,255 INFO L93 Difference]: Finished difference Result 230 states and 291 transitions. [2021-12-16 00:01:00,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 00:01:00,255 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 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 31 [2021-12-16 00:01:00,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:01:00,256 INFO L225 Difference]: With dead ends: 230 [2021-12-16 00:01:00,256 INFO L226 Difference]: Without dead ends: 203 [2021-12-16 00:01:00,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=229, Invalid=978, Unknown=7, NotChecked=426, Total=1640 [2021-12-16 00:01:00,257 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 35 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:01:00,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 218 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 87 Invalid, 0 Unknown, 169 Unchecked, 0.1s Time] [2021-12-16 00:01:00,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-16 00:01:00,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 194. [2021-12-16 00:01:00,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.3005181347150259) internal successors, (251), 193 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:01:00,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 251 transitions. [2021-12-16 00:01:00,267 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 251 transitions. Word has length 31 [2021-12-16 00:01:00,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:01:00,267 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 251 transitions. [2021-12-16 00:01:00,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:01:00,268 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 251 transitions. [2021-12-16 00:01:00,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-16 00:01:00,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:01:00,268 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] [2021-12-16 00:01:00,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 00:01:00,479 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,SelfDestructingSolverStorable11 [2021-12-16 00:01:00,479 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:01:00,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:01:00,480 INFO L85 PathProgramCache]: Analyzing trace with hash -956621735, now seen corresponding path program 1 times [2021-12-16 00:01:00,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:01:00,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327941796] [2021-12-16 00:01:00,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:01:00,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:01:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:01:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 00:01:00,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:01:00,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327941796] [2021-12-16 00:01:00,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327941796] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:01:00,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:01:00,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 00:01:00,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460260537] [2021-12-16 00:01:00,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:01:00,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:01:00,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:01:00,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:01:00,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 00:01:00,510 INFO L87 Difference]: Start difference. First operand 194 states and 251 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:01:00,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:01:00,538 INFO L93 Difference]: Finished difference Result 325 states and 419 transitions. [2021-12-16 00:01:00,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 00:01:00,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-16 00:01:00,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:01:00,540 INFO L225 Difference]: With dead ends: 325 [2021-12-16 00:01:00,540 INFO L226 Difference]: Without dead ends: 226 [2021-12-16 00:01:00,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 00:01:00,542 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 31 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:01:00,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 73 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:01:00,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-12-16 00:01:00,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 194. [2021-12-16 00:01:00,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.2849740932642486) internal successors, (248), 193 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:01:00,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 248 transitions. [2021-12-16 00:01:00,551 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 248 transitions. Word has length 31 [2021-12-16 00:01:00,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:01:00,551 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 248 transitions. [2021-12-16 00:01:00,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:01:00,552 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 248 transitions. [2021-12-16 00:01:00,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-16 00:01:00,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:01:00,552 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:01:00,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 00:01:00,552 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:01:00,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:01:00,553 INFO L85 PathProgramCache]: Analyzing trace with hash 810953566, now seen corresponding path program 4 times [2021-12-16 00:01:00,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:01:00,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919392930] [2021-12-16 00:01:00,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:01:00,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:01:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:01:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 00:01:00,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:01:00,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919392930] [2021-12-16 00:01:00,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919392930] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:01:00,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269677650] [2021-12-16 00:01:00,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 00:01:00,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:01:00,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:01:00,680 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) [2021-12-16 00:01:00,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 00:01:00,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 00:01:00,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:01:00,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-16 00:01:00,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:01:00,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 00:01:00,769 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-16 00:01:00,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-16 00:01:00,807 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-16 00:01:00,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-16 00:01:01,158 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-12-16 00:01:01,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 10 [2021-12-16 00:01:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:01:01,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:01:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:01:01,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269677650] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:01:01,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:01:01,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 16, 16] total 35 [2021-12-16 00:01:01,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275978424] [2021-12-16 00:01:01,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:01:01,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-16 00:01:01,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:01:01,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-16 00:01:01,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2021-12-16 00:01:01,614 INFO L87 Difference]: Start difference. First operand 194 states and 248 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:01:04,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:01:04,059 INFO L93 Difference]: Finished difference Result 653 states and 830 transitions. [2021-12-16 00:01:04,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-16 00:01:04,060 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 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 31 [2021-12-16 00:01:04,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:01:04,063 INFO L225 Difference]: With dead ends: 653 [2021-12-16 00:01:04,063 INFO L226 Difference]: Without dead ends: 651 [2021-12-16 00:01:04,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2725 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1919, Invalid=6823, Unknown=0, NotChecked=0, Total=8742 [2021-12-16 00:01:04,065 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 669 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 487 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 00:01:04,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 528 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 775 Invalid, 0 Unknown, 487 Unchecked, 0.5s Time] [2021-12-16 00:01:04,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-12-16 00:01:04,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 234. [2021-12-16 00:01:04,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.2832618025751072) internal successors, (299), 233 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:01:04,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 299 transitions. [2021-12-16 00:01:04,081 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 299 transitions. Word has length 31 [2021-12-16 00:01:04,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:01:04,081 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 299 transitions. [2021-12-16 00:01:04,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:01:04,082 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 299 transitions. [2021-12-16 00:01:04,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-16 00:01:04,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:01:04,082 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:01:04,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 00:01:04,299 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,SelfDestructingSolverStorable13 [2021-12-16 00:01:04,300 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:01:04,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:01:04,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1777758610, now seen corresponding path program 2 times [2021-12-16 00:01:04,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:01:04,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563410618] [2021-12-16 00:01:04,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:01:04,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:01:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:01:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 00:01:04,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:01:04,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563410618] [2021-12-16 00:01:04,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563410618] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:01:04,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815752758] [2021-12-16 00:01:04,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 00:01:04,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:01:04,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:01:04,372 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) [2021-12-16 00:01:04,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 00:01:04,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 00:01:04,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:01:04,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 00:01:04,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:01:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 00:01:04,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:01:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 00:01:04,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815752758] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:01:04,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:01:04,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-16 00:01:04,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016095391] [2021-12-16 00:01:04,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:01:04,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 00:01:04,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:01:04,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 00:01:04,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-16 00:01:04,614 INFO L87 Difference]: Start difference. First operand 234 states and 299 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:01:04,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:01:04,799 INFO L93 Difference]: Finished difference Result 501 states and 629 transitions. [2021-12-16 00:01:04,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 00:01:04,800 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-16 00:01:04,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:01:04,801 INFO L225 Difference]: With dead ends: 501 [2021-12-16 00:01:04,801 INFO L226 Difference]: Without dead ends: 399 [2021-12-16 00:01:04,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-12-16 00:01:04,802 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 302 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:01:04,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 151 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:01:04,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-12-16 00:01:04,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 284. [2021-12-16 00:01:04,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.2826855123674912) internal successors, (363), 283 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:01:04,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 363 transitions. [2021-12-16 00:01:04,819 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 363 transitions. Word has length 33 [2021-12-16 00:01:04,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:01:04,820 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 363 transitions. [2021-12-16 00:01:04,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:01:04,820 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 363 transitions. [2021-12-16 00:01:04,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-16 00:01:04,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:01:04,821 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:01:04,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 00:01:05,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-16 00:01:05,035 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:01:05,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:01:05,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1071791489, now seen corresponding path program 4 times [2021-12-16 00:01:05,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:01:05,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670936867] [2021-12-16 00:01:05,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:01:05,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:01:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:01:05,099 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:01:05,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:01:05,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670936867] [2021-12-16 00:01:05,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670936867] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:01:05,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071602686] [2021-12-16 00:01:05,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 00:01:05,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:01:05,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:01:05,102 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:01:05,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 00:01:05,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 00:01:05,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:01:05,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 00:01:05,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:01:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:01:05,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:01:05,304 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:01:05,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071602686] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:01:05,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:01:05,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-16 00:01:05,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473323690] [2021-12-16 00:01:05,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:01:05,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 00:01:05,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:01:05,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 00:01:05,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-16 00:01:05,306 INFO L87 Difference]: Start difference. First operand 284 states and 363 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:01:05,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:01:05,544 INFO L93 Difference]: Finished difference Result 640 states and 810 transitions. [2021-12-16 00:01:05,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 00:01:05,544 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-16 00:01:05,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:01:05,546 INFO L225 Difference]: With dead ends: 640 [2021-12-16 00:01:05,546 INFO L226 Difference]: Without dead ends: 615 [2021-12-16 00:01:05,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-12-16 00:01:05,549 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 158 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:01:05,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 238 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:01:05,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-12-16 00:01:05,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 396. [2021-12-16 00:01:05,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 1.3113924050632912) internal successors, (518), 395 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:01:05,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 518 transitions. [2021-12-16 00:01:05,580 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 518 transitions. Word has length 34 [2021-12-16 00:01:05,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:01:05,581 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 518 transitions. [2021-12-16 00:01:05,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:01:05,581 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 518 transitions. [2021-12-16 00:01:05,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-16 00:01:05,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:01:05,582 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] [2021-12-16 00:01:05,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 00:01:05,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-16 00:01:05,800 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:01:05,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:01:05,800 INFO L85 PathProgramCache]: Analyzing trace with hash -715108188, now seen corresponding path program 2 times [2021-12-16 00:01:05,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:01:05,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548095174] [2021-12-16 00:01:05,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:01:05,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:01:05,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:01:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 00:01:06,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:01:06,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548095174] [2021-12-16 00:01:06,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548095174] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:01:06,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763891581] [2021-12-16 00:01:06,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 00:01:06,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:01:06,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:01:06,428 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:01:06,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 00:01:06,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 00:01:06,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:01:06,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-16 00:01:06,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:01:06,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-16 00:01:06,570 INFO L388 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 23 treesize of output 22 [2021-12-16 00:01:06,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 00:01:06,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-12-16 00:01:06,777 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-16 00:01:06,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2021-12-16 00:01:06,869 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-16 00:01:06,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2021-12-16 00:01:07,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-12-16 00:01:07,060 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 00:01:07,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:01:09,147 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1_32| Int)) (or (forall ((v_ArrVal_625 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) (+ |c_ULTIMATE.start_main_~#distance~0#1.offset| (* |v_ULTIMATE.start_main_~x~0#1_32| 4)) v_ArrVal_625) |c_ULTIMATE.start_main_~#distance~0#1.offset|))) (< |v_ULTIMATE.start_main_~x~0#1_32| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ (* |c_ULTIMATE.start_main_~j~0#1| 4) |c_ULTIMATE.start_main_~#Dest~0#1.offset|))))) is different from false [2021-12-16 00:01:09,564 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1_32| Int) (v_ArrVal_625 Int)) (or (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) (+ |c_ULTIMATE.start_main_~#distance~0#1.offset| (* |v_ULTIMATE.start_main_~x~0#1_32| 4)) v_ArrVal_625) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (< |v_ULTIMATE.start_main_~x~0#1_32| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Dest~0#1.base|) |c_ULTIMATE.start_main_~#Dest~0#1.offset|)))) is different from false [2021-12-16 00:01:24,034 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1_33| Int)) (or (< |v_ULTIMATE.start_main_~x~0#1_33| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ (* |c_ULTIMATE.start_main_~j~0#1| 4) |c_ULTIMATE.start_main_~#Dest~0#1.offset|))) (forall ((|v_ULTIMATE.start_main_~x~0#1_32| Int) (v_ArrVal_625 Int) (v_ArrVal_622 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) (+ (* |v_ULTIMATE.start_main_~x~0#1_33| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) v_ArrVal_622))) (or (< |v_ULTIMATE.start_main_~x~0#1_32| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse0) |c_ULTIMATE.start_main_~#Dest~0#1.base|) |c_ULTIMATE.start_main_~#Dest~0#1.offset|)) (<= 0 (select (store .cse0 (+ |c_ULTIMATE.start_main_~#distance~0#1.offset| (* |v_ULTIMATE.start_main_~x~0#1_32| 4)) v_ArrVal_625) |c_ULTIMATE.start_main_~#distance~0#1.offset|))))))) is different from false [2021-12-16 00:01:24,655 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1_33| Int) (|v_ULTIMATE.start_main_~x~0#1_32| Int) (v_ArrVal_625 Int) (v_ArrVal_622 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) (+ (* |v_ULTIMATE.start_main_~x~0#1_33| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) v_ArrVal_622))) (or (< |v_ULTIMATE.start_main_~x~0#1_33| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Dest~0#1.base|) |c_ULTIMATE.start_main_~#Dest~0#1.offset|)) (< |v_ULTIMATE.start_main_~x~0#1_32| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse0) |c_ULTIMATE.start_main_~#Dest~0#1.base|) |c_ULTIMATE.start_main_~#Dest~0#1.offset|)) (<= 0 (select (store .cse0 (+ |c_ULTIMATE.start_main_~#distance~0#1.offset| (* |v_ULTIMATE.start_main_~x~0#1_32| 4)) v_ArrVal_625) |c_ULTIMATE.start_main_~#distance~0#1.offset|))))) is different from false [2021-12-16 00:01:26,734 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_620 Int) (|v_ULTIMATE.start_main_~x~0#1_33| Int) (|v_ULTIMATE.start_main_~x~0#1_32| Int) (v_ArrVal_625 Int) (v_ArrVal_622 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) v_ArrVal_620))) (let ((.cse1 (store .cse0 (+ (* |v_ULTIMATE.start_main_~x~0#1_33| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) v_ArrVal_622))) (or (< |v_ULTIMATE.start_main_~x~0#1_33| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse0) |c_ULTIMATE.start_main_~#Dest~0#1.base|) |c_ULTIMATE.start_main_~#Dest~0#1.offset|)) (< |v_ULTIMATE.start_main_~x~0#1_32| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse1) |c_ULTIMATE.start_main_~#Dest~0#1.base|) |c_ULTIMATE.start_main_~#Dest~0#1.offset|)) (<= 0 (select (store .cse1 (+ |c_ULTIMATE.start_main_~#distance~0#1.offset| (* |v_ULTIMATE.start_main_~x~0#1_32| 4)) v_ArrVal_625) |c_ULTIMATE.start_main_~#distance~0#1.offset|)))))) is different from false [2021-12-16 00:01:28,838 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_150| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_150| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_620 Int) (|v_ULTIMATE.start_main_~x~0#1_33| Int) (|v_ULTIMATE.start_main_~x~0#1_32| Int) (v_ArrVal_625 Int) (v_ArrVal_622 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) (+ |c_ULTIMATE.start_main_~#distance~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_150| 4)) v_ArrVal_620))) (let ((.cse1 (store .cse0 (+ (* |v_ULTIMATE.start_main_~x~0#1_33| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) v_ArrVal_622))) (or (< |v_ULTIMATE.start_main_~x~0#1_33| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse0) |c_ULTIMATE.start_main_~#Dest~0#1.base|) |c_ULTIMATE.start_main_~#Dest~0#1.offset|)) (<= 0 (select (store .cse1 (+ |c_ULTIMATE.start_main_~#distance~0#1.offset| (* |v_ULTIMATE.start_main_~x~0#1_32| 4)) v_ArrVal_625) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (< |v_ULTIMATE.start_main_~x~0#1_32| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse1) |c_ULTIMATE.start_main_~#Dest~0#1.base|) |c_ULTIMATE.start_main_~#Dest~0#1.offset|)))))))) is different from false [2021-12-16 00:01:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 16 not checked. [2021-12-16 00:01:54,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763891581] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:01:54,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:01:54,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 35 [2021-12-16 00:01:54,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977100778] [2021-12-16 00:01:54,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:01:54,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-16 00:01:54,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:01:54,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-16 00:01:54,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=652, Unknown=21, NotChecked=354, Total=1190 [2021-12-16 00:01:54,617 INFO L87 Difference]: Start difference. First operand 396 states and 518 transitions. Second operand has 35 states, 35 states have (on average 2.6) internal successors, (91), 35 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)