./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 20ed64ec 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 a0175e46c372a5de5baa3319396a86b21fa2d79f ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 03:02:13,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 03:02:13,424 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 03:02:13,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 03:02:13,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 03:02:13,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 03:02:13,470 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 03:02:13,474 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 03:02:13,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 03:02:13,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 03:02:13,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 03:02:13,482 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 03:02:13,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 03:02:13,485 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 03:02:13,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 03:02:13,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 03:02:13,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 03:02:13,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 03:02:13,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 03:02:13,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 03:02:13,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 03:02:13,502 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 03:02:13,504 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 03:02:13,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 03:02:13,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 03:02:13,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 03:02:13,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 03:02:13,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 03:02:13,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 03:02:13,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 03:02:13,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 03:02:13,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 03:02:13,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 03:02:13,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 03:02:13,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 03:02:13,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 03:02:13,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 03:02:13,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 03:02:13,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 03:02:13,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 03:02:13,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 03:02:13,523 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 03:02:13,551 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 03:02:13,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 03:02:13,552 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 03:02:13,552 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 03:02:13,553 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 03:02:13,553 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 03:02:13,554 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 03:02:13,554 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 03:02:13,554 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 03:02:13,554 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 03:02:13,555 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 03:02:13,555 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 03:02:13,555 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 03:02:13,555 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 03:02:13,555 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 03:02:13,555 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 03:02:13,556 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 03:02:13,556 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 03:02:13,556 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 03:02:13,556 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 03:02:13,556 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 03:02:13,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 03:02:13,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:02:13,557 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 03:02:13,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 03:02:13,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 03:02:13,557 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 03:02:13,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 03:02:13,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 03:02:13,558 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 03:02:13,558 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0175e46c372a5de5baa3319396a86b21fa2d79f [2021-08-26 03:02:13,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 03:02:13,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 03:02:13,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 03:02:13,807 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 03:02:13,807 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 03:02:13,808 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/eureka_01-1.c [2021-08-26 03:02:13,851 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afbc10c9a/7558c45a434a4575bd05e2a6fdd1d228/FLAG99d4f726e [2021-08-26 03:02:14,130 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 03:02:14,130 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/eureka_01-1.c [2021-08-26 03:02:14,134 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afbc10c9a/7558c45a434a4575bd05e2a6fdd1d228/FLAG99d4f726e [2021-08-26 03:02:14,579 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afbc10c9a/7558c45a434a4575bd05e2a6fdd1d228 [2021-08-26 03:02:14,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 03:02:14,583 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 03:02:14,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 03:02:14,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 03:02:14,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 03:02:14,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:02:14" (1/1) ... [2021-08-26 03:02:14,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@220f5c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:14, skipping insertion in model container [2021-08-26 03:02:14,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:02:14" (1/1) ... [2021-08-26 03:02:14,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 03:02:14,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 03:02:14,697 WARN L228 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] [2021-08-26 03:02:14,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:02:14,720 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 03:02:14,728 WARN L228 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] [2021-08-26 03:02:14,742 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:02:14,750 INFO L208 MainTranslator]: Completed translation [2021-08-26 03:02:14,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:14 WrapperNode [2021-08-26 03:02:14,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 03:02:14,751 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 03:02:14,751 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 03:02:14,752 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 03:02:14,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:14" (1/1) ... [2021-08-26 03:02:14,794 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:14" (1/1) ... [2021-08-26 03:02:14,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 03:02:14,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 03:02:14,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 03:02:14,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 03:02:14,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:14" (1/1) ... [2021-08-26 03:02:14,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:14" (1/1) ... [2021-08-26 03:02:14,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:14" (1/1) ... [2021-08-26 03:02:14,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:14" (1/1) ... [2021-08-26 03:02:14,852 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:14" (1/1) ... [2021-08-26 03:02:14,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:14" (1/1) ... [2021-08-26 03:02:14,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:14" (1/1) ... [2021-08-26 03:02:14,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 03:02:14,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 03:02:14,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 03:02:14,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 03:02:14,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:14" (1/1) ... [2021-08-26 03:02:14,863 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:02:14,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:02:14,890 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) [2021-08-26 03:02:14,921 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 [2021-08-26 03:02:14,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 03:02:14,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 03:02:14,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-26 03:02:14,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 03:02:14,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 03:02:14,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-26 03:02:14,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 03:02:15,265 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 03:02:15,269 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-26 03:02:15,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:02:15 BoogieIcfgContainer [2021-08-26 03:02:15,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 03:02:15,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 03:02:15,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 03:02:15,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 03:02:15,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:02:14" (1/3) ... [2021-08-26 03:02:15,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1e7886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:02:15, skipping insertion in model container [2021-08-26 03:02:15,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:02:14" (2/3) ... [2021-08-26 03:02:15,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1e7886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:02:15, skipping insertion in model container [2021-08-26 03:02:15,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:02:15" (3/3) ... [2021-08-26 03:02:15,278 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-1.c [2021-08-26 03:02:15,282 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 03:02:15,282 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 03:02:15,321 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 03:02:15,328 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-26 03:02:15,329 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 03:02:15,340 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) [2021-08-26 03:02:15,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 03:02:15,343 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:02:15,344 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:02:15,345 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:02:15,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:02:15,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1963003136, now seen corresponding path program 1 times [2021-08-26 03:02:15,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:02:15,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731358169] [2021-08-26 03:02:15,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:02:15,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:02:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:02:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:02:15,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:02:15,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731358169] [2021-08-26 03:02:15,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731358169] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:02:15,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:02:15,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 03:02:15,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353359936] [2021-08-26 03:02:15,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 03:02:15,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:02:15,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 03:02:15,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 03:02:15,618 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) [2021-08-26 03:02:15,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:02:15,723 INFO L93 Difference]: Finished difference Result 89 states and 135 transitions. [2021-08-26 03:02:15,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 03:02:15,725 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 [2021-08-26 03:02:15,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:02:15,730 INFO L225 Difference]: With dead ends: 89 [2021-08-26 03:02:15,730 INFO L226 Difference]: Without dead ends: 42 [2021-08-26 03:02:15,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 03:02:15,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-26 03:02:15,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 26. [2021-08-26 03:02:15,760 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) [2021-08-26 03:02:15,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-08-26 03:02:15,761 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 13 [2021-08-26 03:02:15,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:02:15,762 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-08-26 03:02:15,762 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) [2021-08-26 03:02:15,762 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-08-26 03:02:15,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 03:02:15,762 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:02:15,762 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:02:15,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 03:02:15,763 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:02:15,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:02:15,763 INFO L82 PathProgramCache]: Analyzing trace with hash 629591390, now seen corresponding path program 1 times [2021-08-26 03:02:15,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:02:15,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733310413] [2021-08-26 03:02:15,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:02:15,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:02:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:02:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:02:15,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:02:15,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733310413] [2021-08-26 03:02:15,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733310413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:15,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529672609] [2021-08-26 03:02:15,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:02:15,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:02:15,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:02:15,985 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) [2021-08-26 03:02:15,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 03:02:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:02:16,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-26 03:02:16,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:02:16,173 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 18 treesize of output 14 [2021-08-26 03:02:16,303 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 33 treesize of output 25 [2021-08-26 03:02:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:02:16,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529672609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:16,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:02:16,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-26 03:02:16,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059506216] [2021-08-26 03:02:16,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 03:02:16,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:02:16,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 03:02:16,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-26 03:02:16,337 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:16,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:02:16,444 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2021-08-26 03:02:16,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 03:02:16,444 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-26 03:02:16,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:02:16,445 INFO L225 Difference]: With dead ends: 70 [2021-08-26 03:02:16,445 INFO L226 Difference]: Without dead ends: 68 [2021-08-26 03:02:16,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-26 03:02:16,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-26 03:02:16,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2021-08-26 03:02:16,450 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) [2021-08-26 03:02:16,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2021-08-26 03:02:16,450 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 19 [2021-08-26 03:02:16,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:02:16,451 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2021-08-26 03:02:16,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:16,451 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2021-08-26 03:02:16,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 03:02:16,452 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:02:16,452 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:02:16,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 03:02:16,668 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 [2021-08-26 03:02:16,669 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:02:16,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:02:16,670 INFO L82 PathProgramCache]: Analyzing trace with hash -381525860, now seen corresponding path program 1 times [2021-08-26 03:02:16,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:02:16,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105296422] [2021-08-26 03:02:16,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:02:16,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:02:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:02:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:02:16,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:02:16,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105296422] [2021-08-26 03:02:16,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105296422] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:02:16,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:02:16,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 03:02:16,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872325259] [2021-08-26 03:02:16,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 03:02:16,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:02:16,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 03:02:16,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:02:16,702 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) [2021-08-26 03:02:16,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:02:16,725 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2021-08-26 03:02:16,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 03:02:16,725 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 [2021-08-26 03:02:16,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:02:16,726 INFO L225 Difference]: With dead ends: 66 [2021-08-26 03:02:16,726 INFO L226 Difference]: Without dead ends: 45 [2021-08-26 03:02:16,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:02:16,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-26 03:02:16,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-08-26 03:02:16,729 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) [2021-08-26 03:02:16,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-08-26 03:02:16,729 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 19 [2021-08-26 03:02:16,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:02:16,730 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-08-26 03:02:16,730 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) [2021-08-26 03:02:16,730 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2021-08-26 03:02:16,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-26 03:02:16,730 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:02:16,730 INFO L512 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] [2021-08-26 03:02:16,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-26 03:02:16,731 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:02:16,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:02:16,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1960843935, now seen corresponding path program 1 times [2021-08-26 03:02:16,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:02:16,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028065478] [2021-08-26 03:02:16,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:02:16,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:02:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:02:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:02:16,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:02:16,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028065478] [2021-08-26 03:02:16,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028065478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:16,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869829777] [2021-08-26 03:02:16,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:02:16,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:02:16,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:02:16,786 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) [2021-08-26 03:02:16,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 03:02:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:02:16,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-26 03:02:16,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:02:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:02:16,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869829777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:16,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:02:16,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-08-26 03:02:16,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864345627] [2021-08-26 03:02:16,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 03:02:16,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:02:16,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 03:02:16,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-26 03:02:16,940 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:17,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:02:17,009 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2021-08-26 03:02:17,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 03:02:17,009 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2021-08-26 03:02:17,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:02:17,012 INFO L225 Difference]: With dead ends: 114 [2021-08-26 03:02:17,012 INFO L226 Difference]: Without dead ends: 86 [2021-08-26 03:02:17,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-26 03:02:17,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-26 03:02:17,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2021-08-26 03:02:17,024 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) [2021-08-26 03:02:17,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2021-08-26 03:02:17,027 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 22 [2021-08-26 03:02:17,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:02:17,027 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2021-08-26 03:02:17,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:17,027 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2021-08-26 03:02:17,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-26 03:02:17,028 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:02:17,029 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:02:17,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 03:02:17,238 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 [2021-08-26 03:02:17,238 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:02:17,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:02:17,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1926841972, now seen corresponding path program 1 times [2021-08-26 03:02:17,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:02:17,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023550562] [2021-08-26 03:02:17,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:02:17,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:02:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:02:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:02:17,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:02:17,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023550562] [2021-08-26 03:02:17,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023550562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:17,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382660261] [2021-08-26 03:02:17,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:02:17,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:02:17,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:02:17,312 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) [2021-08-26 03:02:17,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 03:02:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:02:17,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-26 03:02:17,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:02:17,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:02:17,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382660261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:17,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:02:17,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-26 03:02:17,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746549643] [2021-08-26 03:02:17,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 03:02:17,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:02:17,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 03:02:17,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-26 03:02:17,506 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:17,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:02:17,744 INFO L93 Difference]: Finished difference Result 181 states and 231 transitions. [2021-08-26 03:02:17,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 03:02:17,744 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 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 [2021-08-26 03:02:17,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:02:17,746 INFO L225 Difference]: With dead ends: 181 [2021-08-26 03:02:17,746 INFO L226 Difference]: Without dead ends: 159 [2021-08-26 03:02:17,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-26 03:02:17,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-08-26 03:02:17,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 75. [2021-08-26 03:02:17,755 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) [2021-08-26 03:02:17,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-08-26 03:02:17,756 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 22 [2021-08-26 03:02:17,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:02:17,759 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-08-26 03:02:17,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:17,759 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-08-26 03:02:17,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-26 03:02:17,760 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:02:17,760 INFO L512 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] [2021-08-26 03:02:17,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 03:02:17,960 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 [2021-08-26 03:02:17,960 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:02:17,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:02:17,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1234267636, now seen corresponding path program 1 times [2021-08-26 03:02:17,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:02:17,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468184770] [2021-08-26 03:02:17,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:02:17,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:02:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:02:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:02:18,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:02:18,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468184770] [2021-08-26 03:02:18,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468184770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:18,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884599950] [2021-08-26 03:02:18,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:02:18,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:02:18,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:02:18,005 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) [2021-08-26 03:02:18,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 03:02:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:02:18,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-26 03:02:18,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:02:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:02:18,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884599950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:18,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:02:18,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-26 03:02:18,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666006851] [2021-08-26 03:02:18,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 03:02:18,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:02:18,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 03:02:18,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-26 03:02:18,218 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:18,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:02:18,345 INFO L93 Difference]: Finished difference Result 206 states and 263 transitions. [2021-08-26 03:02:18,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 03:02:18,346 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 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 [2021-08-26 03:02:18,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:02:18,347 INFO L225 Difference]: With dead ends: 206 [2021-08-26 03:02:18,347 INFO L226 Difference]: Without dead ends: 146 [2021-08-26 03:02:18,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-26 03:02:18,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-08-26 03:02:18,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 92. [2021-08-26 03:02:18,356 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) [2021-08-26 03:02:18,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 119 transitions. [2021-08-26 03:02:18,356 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 119 transitions. Word has length 23 [2021-08-26 03:02:18,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:02:18,356 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 119 transitions. [2021-08-26 03:02:18,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:18,356 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 119 transitions. [2021-08-26 03:02:18,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-26 03:02:18,357 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:02:18,357 INFO L512 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] [2021-08-26 03:02:18,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 03:02:18,568 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 [2021-08-26 03:02:18,569 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:02:18,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:02:18,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1741027445, now seen corresponding path program 1 times [2021-08-26 03:02:18,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:02:18,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085918059] [2021-08-26 03:02:18,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:02:18,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:02:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:02:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:02:18,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:02:18,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085918059] [2021-08-26 03:02:18,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085918059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:18,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805122692] [2021-08-26 03:02:18,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:02:18,993 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:02:18,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:02:18,997 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) [2021-08-26 03:02:19,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 03:02:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:02:19,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-26 03:02:19,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:02:19,162 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 [2021-08-26 03:02:19,213 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 [2021-08-26 03:02:19,376 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-08-26 03:02:19,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-08-26 03:02:19,754 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-08-26 03:02:19,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 40 [2021-08-26 03:02:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:02:19,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805122692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:19,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:02:19,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-26 03:02:19,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442052144] [2021-08-26 03:02:19,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-26 03:02:19,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:02:19,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-26 03:02:19,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-26 03:02:19,782 INFO L87 Difference]: Start difference. First operand 92 states and 119 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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) [2021-08-26 03:02:21,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:02:21,465 INFO L93 Difference]: Finished difference Result 252 states and 308 transitions. [2021-08-26 03:02:21,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-26 03:02:21,465 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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 25 [2021-08-26 03:02:21,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:02:21,467 INFO L225 Difference]: With dead ends: 252 [2021-08-26 03:02:21,467 INFO L226 Difference]: Without dead ends: 230 [2021-08-26 03:02:21,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1160.4ms TimeCoverageRelationStatistics Valid=534, Invalid=1916, Unknown=0, NotChecked=0, Total=2450 [2021-08-26 03:02:21,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-08-26 03:02:21,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 96. [2021-08-26 03:02:21,475 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) [2021-08-26 03:02:21,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2021-08-26 03:02:21,476 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 25 [2021-08-26 03:02:21,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:02:21,476 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2021-08-26 03:02:21,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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) [2021-08-26 03:02:21,476 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2021-08-26 03:02:21,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-26 03:02:21,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:02:21,477 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:02:21,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 03:02:21,694 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 [2021-08-26 03:02:21,694 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:02:21,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:02:21,695 INFO L82 PathProgramCache]: Analyzing trace with hash -858936254, now seen corresponding path program 2 times [2021-08-26 03:02:21,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:02:21,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212581404] [2021-08-26 03:02:21,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:02:21,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:02:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:02:21,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-26 03:02:21,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:02:21,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212581404] [2021-08-26 03:02:21,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212581404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:21,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237256781] [2021-08-26 03:02:21,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:02:21,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:02:21,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:02:21,805 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) [2021-08-26 03:02:21,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 03:02:21,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:02:21,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:02:21,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 03:02:21,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:02:21,994 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 [2021-08-26 03:02:22,057 INFO L354 Elim1Store]: treesize reduction 46, result has 23.3 percent of original size [2021-08-26 03:02:22,057 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 39 treesize of output 38 [2021-08-26 03:02:22,184 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 33 treesize of output 25 [2021-08-26 03:02:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-26 03:02:22,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237256781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:22,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:02:22,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-26 03:02:22,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850361163] [2021-08-26 03:02:22,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 03:02:22,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:02:22,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 03:02:22,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-26 03:02:22,202 INFO L87 Difference]: Start difference. First operand 96 states and 126 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:22,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:02:22,376 INFO L93 Difference]: Finished difference Result 159 states and 205 transitions. [2021-08-26 03:02:22,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 03:02:22,376 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2021-08-26 03:02:22,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:02:22,377 INFO L225 Difference]: With dead ends: 159 [2021-08-26 03:02:22,377 INFO L226 Difference]: Without dead ends: 157 [2021-08-26 03:02:22,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-26 03:02:22,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-08-26 03:02:22,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 106. [2021-08-26 03:02:22,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.3428571428571427) internal successors, (141), 105 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:22,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2021-08-26 03:02:22,385 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 141 transitions. Word has length 25 [2021-08-26 03:02:22,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:02:22,385 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 141 transitions. [2021-08-26 03:02:22,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:22,385 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 141 transitions. [2021-08-26 03:02:22,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 03:02:22,386 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:02:22,386 INFO L512 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] [2021-08-26 03:02:22,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-26 03:02:22,592 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 [2021-08-26 03:02:22,593 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:02:22,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:02:22,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1096380170, now seen corresponding path program 2 times [2021-08-26 03:02:22,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:02:22,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693410252] [2021-08-26 03:02:22,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:02:22,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:02:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:02:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:02:22,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:02:22,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693410252] [2021-08-26 03:02:22,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693410252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:22,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341994307] [2021-08-26 03:02:22,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:02:22,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:02:22,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:02:22,647 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) [2021-08-26 03:02:22,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-26 03:02:22,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:02:22,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:02:22,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-26 03:02:22,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:02:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:02:22,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341994307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:22,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:02:22,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-26 03:02:22,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043049615] [2021-08-26 03:02:22,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 03:02:22,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:02:22,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 03:02:22,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-26 03:02:22,927 INFO L87 Difference]: Start difference. First operand 106 states and 141 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:23,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:02:23,107 INFO L93 Difference]: Finished difference Result 216 states and 272 transitions. [2021-08-26 03:02:23,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 03:02:23,108 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-26 03:02:23,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:02:23,108 INFO L225 Difference]: With dead ends: 216 [2021-08-26 03:02:23,108 INFO L226 Difference]: Without dead ends: 203 [2021-08-26 03:02:23,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-08-26 03:02:23,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-08-26 03:02:23,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 148. [2021-08-26 03:02:23,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.3333333333333333) internal successors, (196), 147 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:23,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 196 transitions. [2021-08-26 03:02:23,117 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 196 transitions. Word has length 28 [2021-08-26 03:02:23,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:02:23,118 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 196 transitions. [2021-08-26 03:02:23,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:23,118 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 196 transitions. [2021-08-26 03:02:23,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-26 03:02:23,118 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:02:23,119 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:02:23,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-26 03:02:23,324 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 [2021-08-26 03:02:23,325 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:02:23,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:02:23,325 INFO L82 PathProgramCache]: Analyzing trace with hash 160714710, now seen corresponding path program 2 times [2021-08-26 03:02:23,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:02:23,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877468997] [2021-08-26 03:02:23,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:02:23,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:02:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:02:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-26 03:02:23,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:02:23,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877468997] [2021-08-26 03:02:23,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877468997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:23,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111043937] [2021-08-26 03:02:23,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:02:23,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:02:23,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:02:23,381 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) [2021-08-26 03:02:23,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-26 03:02:23,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:02:23,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:02:23,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-26 03:02:23,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:02:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-26 03:02:23,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111043937] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:02:23,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 03:02:23,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-08-26 03:02:23,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461660216] [2021-08-26 03:02:23,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 03:02:23,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:02:23,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 03:02:23,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-26 03:02:23,663 INFO L87 Difference]: Start difference. First operand 148 states and 196 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:23,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:02:23,708 INFO L93 Difference]: Finished difference Result 246 states and 322 transitions. [2021-08-26 03:02:23,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 03:02:23,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-26 03:02:23,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:02:23,709 INFO L225 Difference]: With dead ends: 246 [2021-08-26 03:02:23,709 INFO L226 Difference]: Without dead ends: 129 [2021-08-26 03:02:23,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-26 03:02:23,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-08-26 03:02:23,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 114. [2021-08-26 03:02:23,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.2831858407079646) internal successors, (145), 113 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:23,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 145 transitions. [2021-08-26 03:02:23,715 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 145 transitions. Word has length 29 [2021-08-26 03:02:23,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:02:23,715 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 145 transitions. [2021-08-26 03:02:23,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:23,715 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 145 transitions. [2021-08-26 03:02:23,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-26 03:02:23,716 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:02:23,716 INFO L512 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] [2021-08-26 03:02:23,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-26 03:02:23,920 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 [2021-08-26 03:02:23,921 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:02:23,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:02:23,921 INFO L82 PathProgramCache]: Analyzing trace with hash 583416536, now seen corresponding path program 1 times [2021-08-26 03:02:23,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:02:23,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571664122] [2021-08-26 03:02:23,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:02:23,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:02:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:02:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-26 03:02:24,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:02:24,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571664122] [2021-08-26 03:02:24,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571664122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:24,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768983365] [2021-08-26 03:02:24,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:02:24,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:02:24,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:02:24,028 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) [2021-08-26 03:02:24,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-26 03:02:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:02:24,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-26 03:02:24,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:02:24,270 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 17 treesize of output 13 [2021-08-26 03:02:24,385 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 37 treesize of output 25 [2021-08-26 03:02:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-26 03:02:24,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768983365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:24,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:02:24,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-08-26 03:02:24,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301914312] [2021-08-26 03:02:24,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-26 03:02:24,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:02:24,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-26 03:02:24,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-26 03:02:24,404 INFO L87 Difference]: Start difference. First operand 114 states and 145 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:24,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:02:24,767 INFO L93 Difference]: Finished difference Result 183 states and 226 transitions. [2021-08-26 03:02:24,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-26 03:02:24,768 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-26 03:02:24,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:02:24,769 INFO L225 Difference]: With dead ends: 183 [2021-08-26 03:02:24,769 INFO L226 Difference]: Without dead ends: 181 [2021-08-26 03:02:24,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 209.0ms TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2021-08-26 03:02:24,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-08-26 03:02:24,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2021-08-26 03:02:24,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.2735042735042734) internal successors, (149), 117 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:24,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 149 transitions. [2021-08-26 03:02:24,779 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 149 transitions. Word has length 29 [2021-08-26 03:02:24,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:02:24,779 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 149 transitions. [2021-08-26 03:02:24,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:24,779 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 149 transitions. [2021-08-26 03:02:24,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-26 03:02:24,780 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:02:24,780 INFO L512 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] [2021-08-26 03:02:24,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-26 03:02:24,988 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 [2021-08-26 03:02:24,989 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:02:24,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:02:24,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1240772930, now seen corresponding path program 3 times [2021-08-26 03:02:24,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:02:24,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698287321] [2021-08-26 03:02:24,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:02:24,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:02:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:02:25,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:02:25,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:02:25,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698287321] [2021-08-26 03:02:25,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698287321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:25,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041849508] [2021-08-26 03:02:25,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:02:25,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:02:25,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:02:25,814 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) [2021-08-26 03:02:25,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-26 03:02:26,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-26 03:02:26,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:02:26,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-26 03:02:26,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:02:26,099 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 [2021-08-26 03:02:26,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:26,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:26,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:26,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-08-26 03:02:26,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:26,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:26,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:26,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:26,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 03:02:26,424 INFO L354 Elim1Store]: treesize reduction 203, result has 15.1 percent of original size [2021-08-26 03:02:26,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 59 treesize of output 62 [2021-08-26 03:02:26,702 INFO L354 Elim1Store]: treesize reduction 224, result has 15.2 percent of original size [2021-08-26 03:02:26,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 74 [2021-08-26 03:02:27,610 INFO L354 Elim1Store]: treesize reduction 121, result has 3.2 percent of original size [2021-08-26 03:02:27,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 90 treesize of output 54 [2021-08-26 03:02:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-26 03:02:27,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041849508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:27,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:02:27,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2021-08-26 03:02:27,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41384815] [2021-08-26 03:02:27,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-26 03:02:27,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:02:27,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-26 03:02:27,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-08-26 03:02:27,641 INFO L87 Difference]: Start difference. First operand 118 states and 149 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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) [2021-08-26 03:02:28,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:02:28,786 INFO L93 Difference]: Finished difference Result 170 states and 209 transitions. [2021-08-26 03:02:28,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-26 03:02:28,787 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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 31 [2021-08-26 03:02:28,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:02:28,787 INFO L225 Difference]: With dead ends: 170 [2021-08-26 03:02:28,788 INFO L226 Difference]: Without dead ends: 138 [2021-08-26 03:02:28,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1359.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1364, Unknown=0, NotChecked=0, Total=1722 [2021-08-26 03:02:28,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-08-26 03:02:28,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 121. [2021-08-26 03:02:28,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.275) internal successors, (153), 120 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:28,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 153 transitions. [2021-08-26 03:02:28,795 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 153 transitions. Word has length 31 [2021-08-26 03:02:28,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:02:28,796 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 153 transitions. [2021-08-26 03:02:28,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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) [2021-08-26 03:02:28,796 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 153 transitions. [2021-08-26 03:02:28,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-26 03:02:28,796 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:02:28,797 INFO L512 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] [2021-08-26 03:02:28,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-26 03:02:29,004 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 [2021-08-26 03:02:29,005 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:02:29,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:02:29,005 INFO L82 PathProgramCache]: Analyzing trace with hash -956621735, now seen corresponding path program 1 times [2021-08-26 03:02:29,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:02:29,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578002591] [2021-08-26 03:02:29,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:02:29,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:02:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:02:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-26 03:02:29,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:02:29,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578002591] [2021-08-26 03:02:29,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578002591] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:02:29,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:02:29,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 03:02:29,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388662867] [2021-08-26 03:02:29,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 03:02:29,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:02:29,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 03:02:29,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 03:02:29,044 INFO L87 Difference]: Start difference. First operand 121 states and 153 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) [2021-08-26 03:02:29,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:02:29,066 INFO L93 Difference]: Finished difference Result 197 states and 246 transitions. [2021-08-26 03:02:29,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 03:02:29,066 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 [2021-08-26 03:02:29,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:02:29,067 INFO L225 Difference]: With dead ends: 197 [2021-08-26 03:02:29,067 INFO L226 Difference]: Without dead ends: 141 [2021-08-26 03:02:29,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 03:02:29,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-08-26 03:02:29,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 121. [2021-08-26 03:02:29,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.2666666666666666) internal successors, (152), 120 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:29,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 152 transitions. [2021-08-26 03:02:29,074 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 152 transitions. Word has length 31 [2021-08-26 03:02:29,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:02:29,074 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 152 transitions. [2021-08-26 03:02:29,074 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) [2021-08-26 03:02:29,074 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 152 transitions. [2021-08-26 03:02:29,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-26 03:02:29,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:02:29,075 INFO L512 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] [2021-08-26 03:02:29,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-26 03:02:29,075 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:02:29,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:02:29,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1777758610, now seen corresponding path program 2 times [2021-08-26 03:02:29,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:02:29,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331650337] [2021-08-26 03:02:29,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:02:29,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:02:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:02:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-26 03:02:29,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:02:29,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331650337] [2021-08-26 03:02:29,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331650337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:29,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665883514] [2021-08-26 03:02:29,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:02:29,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:02:29,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:02:29,126 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) [2021-08-26 03:02:29,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-26 03:02:29,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:02:29,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:02:29,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-26 03:02:29,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:02:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-26 03:02:29,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665883514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:29,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:02:29,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-26 03:02:29,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916380832] [2021-08-26 03:02:29,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 03:02:29,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:02:29,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 03:02:29,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-26 03:02:29,541 INFO L87 Difference]: Start difference. First operand 121 states and 152 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:29,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:02:29,752 INFO L93 Difference]: Finished difference Result 403 states and 505 transitions. [2021-08-26 03:02:29,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 03:02:29,752 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 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 [2021-08-26 03:02:29,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:02:29,753 INFO L225 Difference]: With dead ends: 403 [2021-08-26 03:02:29,753 INFO L226 Difference]: Without dead ends: 298 [2021-08-26 03:02:29,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-08-26 03:02:29,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-08-26 03:02:29,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 204. [2021-08-26 03:02:29,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.2857142857142858) internal successors, (261), 203 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:29,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 261 transitions. [2021-08-26 03:02:29,766 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 261 transitions. Word has length 33 [2021-08-26 03:02:29,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:02:29,766 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 261 transitions. [2021-08-26 03:02:29,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:29,766 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 261 transitions. [2021-08-26 03:02:29,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-26 03:02:29,767 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:02:29,767 INFO L512 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] [2021-08-26 03:02:29,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-26 03:02:29,972 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 [2021-08-26 03:02:29,973 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:02:29,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:02:29,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1071791489, now seen corresponding path program 4 times [2021-08-26 03:02:29,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:02:29,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170790624] [2021-08-26 03:02:29,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:02:29,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:02:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:02:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:02:30,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:02:30,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170790624] [2021-08-26 03:02:30,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170790624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:30,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139454566] [2021-08-26 03:02:30,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:02:30,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:02:30,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:02:30,029 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) [2021-08-26 03:02:30,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-26 03:02:30,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:02:30,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:02:30,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-26 03:02:30,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:02:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:02:30,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139454566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:30,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:02:30,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-26 03:02:30,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585902209] [2021-08-26 03:02:30,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 03:02:30,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:02:30,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 03:02:30,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-26 03:02:30,452 INFO L87 Difference]: Start difference. First operand 204 states and 261 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-08-26 03:02:30,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:02:30,678 INFO L93 Difference]: Finished difference Result 487 states and 611 transitions. [2021-08-26 03:02:30,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-26 03:02:30,679 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 34 [2021-08-26 03:02:30,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:02:30,680 INFO L225 Difference]: With dead ends: 487 [2021-08-26 03:02:30,680 INFO L226 Difference]: Without dead ends: 465 [2021-08-26 03:02:30,681 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2021-08-26 03:02:30,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-08-26 03:02:30,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 289. [2021-08-26 03:02:30,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.3159722222222223) internal successors, (379), 288 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:30,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 379 transitions. [2021-08-26 03:02:30,696 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 379 transitions. Word has length 34 [2021-08-26 03:02:30,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:02:30,696 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 379 transitions. [2021-08-26 03:02:30,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-08-26 03:02:30,697 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 379 transitions. [2021-08-26 03:02:30,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-26 03:02:30,697 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:02:30,697 INFO L512 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] [2021-08-26 03:02:30,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-26 03:02:30,904 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 [2021-08-26 03:02:30,905 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:02:30,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:02:30,905 INFO L82 PathProgramCache]: Analyzing trace with hash -715108188, now seen corresponding path program 2 times [2021-08-26 03:02:30,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:02:30,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737708670] [2021-08-26 03:02:30,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:02:30,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:02:30,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:02:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 03:02:31,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:02:31,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737708670] [2021-08-26 03:02:31,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737708670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:31,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136970208] [2021-08-26 03:02:31,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:02:31,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:02:31,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:02:31,389 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) [2021-08-26 03:02:31,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-26 03:02:31,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:02:31,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:02:31,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-26 03:02:31,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:02:31,734 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 [2021-08-26 03:02:31,774 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 [2021-08-26 03:02:31,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:31,849 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 03:02:31,850 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 28 treesize of output 30 [2021-08-26 03:02:31,968 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-08-26 03:02:31,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 35 [2021-08-26 03:02:32,129 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-08-26 03:02:32,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 40 [2021-08-26 03:02:32,326 INFO L354 Elim1Store]: treesize reduction 25, result has 13.8 percent of original size [2021-08-26 03:02:32,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 42 [2021-08-26 03:02:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:02:32,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136970208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:32,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:02:32,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-08-26 03:02:32,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460078399] [2021-08-26 03:02:32,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-26 03:02:32,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:02:32,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-26 03:02:32,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-08-26 03:02:32,352 INFO L87 Difference]: Start difference. First operand 289 states and 379 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 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) [2021-08-26 03:02:34,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:02:34,498 INFO L93 Difference]: Finished difference Result 808 states and 1021 transitions. [2021-08-26 03:02:34,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-26 03:02:34,498 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 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) Word has length 34 [2021-08-26 03:02:34,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:02:34,501 INFO L225 Difference]: With dead ends: 808 [2021-08-26 03:02:34,501 INFO L226 Difference]: Without dead ends: 806 [2021-08-26 03:02:34,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 1710.1ms TimeCoverageRelationStatistics Valid=957, Invalid=4593, Unknown=0, NotChecked=0, Total=5550 [2021-08-26 03:02:34,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-08-26 03:02:34,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 469. [2021-08-26 03:02:34,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.3461538461538463) internal successors, (630), 468 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:02:34,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 630 transitions. [2021-08-26 03:02:34,528 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 630 transitions. Word has length 34 [2021-08-26 03:02:34,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:02:34,529 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 630 transitions. [2021-08-26 03:02:34,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 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) [2021-08-26 03:02:34,529 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 630 transitions. [2021-08-26 03:02:34,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-26 03:02:34,530 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:02:34,530 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:02:34,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-26 03:02:34,736 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 [2021-08-26 03:02:34,737 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:02:34,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:02:34,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1136182421, now seen corresponding path program 5 times [2021-08-26 03:02:34,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:02:34,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754662991] [2021-08-26 03:02:34,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:02:34,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:02:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:02:35,858 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:02:35,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:02:35,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754662991] [2021-08-26 03:02:35,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754662991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:35,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398356876] [2021-08-26 03:02:35,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:02:35,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:02:35,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:02:35,859 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) [2021-08-26 03:02:35,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-26 03:02:36,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-26 03:02:36,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:02:36,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-26 03:02:36,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:02:36,381 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 25 treesize of output 23 [2021-08-26 03:02:36,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:36,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:36,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:36,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:36,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:36,521 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 03:02:36,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 66 [2021-08-26 03:02:36,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:36,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:36,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:36,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:36,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 03:02:36,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:36,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:36,975 INFO L354 Elim1Store]: treesize reduction 199, result has 19.1 percent of original size [2021-08-26 03:02:36,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 74 treesize of output 90 [2021-08-26 03:02:37,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:37,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:37,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:37,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 03:02:37,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:37,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 03:02:37,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:37,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:37,355 INFO L354 Elim1Store]: treesize reduction 355, result has 13.4 percent of original size [2021-08-26 03:02:37,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 104 treesize of output 110 [2021-08-26 03:02:37,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:37,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:37,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:37,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:37,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:02:37,793 INFO L354 Elim1Store]: treesize reduction 336, result has 14.7 percent of original size [2021-08-26 03:02:37,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 32 case distinctions, treesize of input 111 treesize of output 121 [2021-08-26 03:02:41,265 INFO L354 Elim1Store]: treesize reduction 128, result has 9.2 percent of original size [2021-08-26 03:02:41,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 108 treesize of output 74 [2021-08-26 03:02:41,303 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-26 03:02:41,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398356876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:02:41,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:02:41,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 37 [2021-08-26 03:02:41,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779058332] [2021-08-26 03:02:41,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-26 03:02:41,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:02:41,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-26 03:02:41,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-08-26 03:02:41,305 INFO L87 Difference]: Start difference. First operand 469 states and 630 transitions. Second operand has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:03:01,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:03:01,802 INFO L93 Difference]: Finished difference Result 1738 states and 2258 transitions. [2021-08-26 03:03:01,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-08-26 03:03:01,802 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-26 03:03:01,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:03:01,806 INFO L225 Difference]: With dead ends: 1738 [2021-08-26 03:03:01,806 INFO L226 Difference]: Without dead ends: 1576 [2021-08-26 03:03:01,812 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12161 ImplicationChecksByTransitivity, 20667.2ms TimeCoverageRelationStatistics Valid=4108, Invalid=29564, Unknown=0, NotChecked=0, Total=33672 [2021-08-26 03:03:01,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-08-26 03:03:01,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 393. [2021-08-26 03:03:01,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.3265306122448979) internal successors, (520), 392 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:03:01,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 520 transitions. [2021-08-26 03:03:01,861 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 520 transitions. Word has length 37 [2021-08-26 03:03:01,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:03:01,861 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 520 transitions. [2021-08-26 03:03:01,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:03:01,862 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 520 transitions. [2021-08-26 03:03:01,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-26 03:03:01,862 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:03:01,863 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:03:01,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-26 03:03:02,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:03:02,077 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:03:02,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:03:02,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1630806470, now seen corresponding path program 1 times [2021-08-26 03:03:02,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:03:02,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126053288] [2021-08-26 03:03:02,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:02,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:03:02,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-26 03:03:03,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:03:03,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126053288] [2021-08-26 03:03:03,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126053288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:03:03,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20053214] [2021-08-26 03:03:03,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:03,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:03:03,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:03:03,234 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:03:03,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-26 03:03:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:03,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-26 03:03:03,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:03:03,776 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 [2021-08-26 03:03:03,918 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-26 03:03:03,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 42 [2021-08-26 03:03:04,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 03:03:04,081 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-26 03:03:04,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 50 [2021-08-26 03:03:04,378 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-08-26 03:03:04,379 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 55 [2021-08-26 03:03:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-26 03:03:04,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20053214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:03:04,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:03:04,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-26 03:03:04,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247374500] [2021-08-26 03:03:04,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-26 03:03:04,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:03:04,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-26 03:03:04,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-08-26 03:03:04,714 INFO L87 Difference]: Start difference. First operand 393 states and 520 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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) [2021-08-26 03:03:05,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:03:05,958 INFO L93 Difference]: Finished difference Result 549 states and 706 transitions. [2021-08-26 03:03:05,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-26 03:03:05,958 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 38 [2021-08-26 03:03:05,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:03:05,960 INFO L225 Difference]: With dead ends: 549 [2021-08-26 03:03:05,960 INFO L226 Difference]: Without dead ends: 486 [2021-08-26 03:03:05,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1264.2ms TimeCoverageRelationStatistics Valid=266, Invalid=924, Unknown=0, NotChecked=0, Total=1190 [2021-08-26 03:03:05,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-08-26 03:03:05,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 407. [2021-08-26 03:03:05,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.3226600985221675) internal successors, (537), 406 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:03:05,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 537 transitions. [2021-08-26 03:03:05,998 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 537 transitions. Word has length 38 [2021-08-26 03:03:05,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:03:05,998 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 537 transitions. [2021-08-26 03:03:05,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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) [2021-08-26 03:03:05,998 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 537 transitions. [2021-08-26 03:03:05,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-26 03:03:05,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:03:05,999 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:03:06,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-26 03:03:06,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-26 03:03:06,200 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:03:06,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:03:06,200 INFO L82 PathProgramCache]: Analyzing trace with hash 670016120, now seen corresponding path program 1 times [2021-08-26 03:03:06,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:03:06,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175669059] [2021-08-26 03:03:06,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:06,200 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:03:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 03:03:06,230 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 03:03:06,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 03:03:06,270 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 03:03:06,270 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 03:03:06,273 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 03:03:06,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-26 03:03:06,279 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 03:03:06,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:03:06 BoogieIcfgContainer [2021-08-26 03:03:06,323 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 03:03:06,323 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 03:03:06,323 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 03:03:06,323 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 03:03:06,324 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:02:15" (3/4) ... [2021-08-26 03:03:06,325 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 03:03:06,353 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 03:03:06,353 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 03:03:06,354 INFO L168 Benchmark]: Toolchain (without parser) took 51770.46 ms. Allocated memory was 58.7 MB in the beginning and 318.8 MB in the end (delta: 260.0 MB). Free memory was 38.3 MB in the beginning and 137.7 MB in the end (delta: -99.4 MB). Peak memory consumption was 161.7 MB. Max. memory is 16.1 GB. [2021-08-26 03:03:06,354 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 58.7 MB. Free memory was 41.0 MB in the beginning and 41.0 MB in the end (delta: 38.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:03:06,354 INFO L168 Benchmark]: CACSL2BoogieTranslator took 165.69 ms. Allocated memory is still 58.7 MB. Free memory was 38.0 MB in the beginning and 26.9 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-26 03:03:06,354 INFO L168 Benchmark]: Boogie Procedure Inliner took 71.57 ms. Allocated memory is still 58.7 MB. Free memory was 26.9 MB in the beginning and 41.3 MB in the end (delta: -14.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-26 03:03:06,354 INFO L168 Benchmark]: Boogie Preprocessor took 34.11 ms. Allocated memory is still 58.7 MB. Free memory was 41.3 MB in the beginning and 39.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:03:06,355 INFO L168 Benchmark]: RCFGBuilder took 413.24 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 39.5 MB in the beginning and 45.8 MB in the end (delta: -6.3 MB). Peak memory consumption was 16.5 MB. Max. memory is 16.1 GB. [2021-08-26 03:03:06,355 INFO L168 Benchmark]: TraceAbstraction took 51050.01 ms. Allocated memory was 71.3 MB in the beginning and 318.8 MB in the end (delta: 247.5 MB). Free memory was 45.5 MB in the beginning and 141.9 MB in the end (delta: -96.4 MB). Peak memory consumption was 150.3 MB. Max. memory is 16.1 GB. [2021-08-26 03:03:06,355 INFO L168 Benchmark]: Witness Printer took 30.12 ms. Allocated memory is still 318.8 MB. Free memory was 141.9 MB in the beginning and 137.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-26 03:03:06,356 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 58.7 MB. Free memory was 41.0 MB in the beginning and 41.0 MB in the end (delta: 38.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 165.69 ms. Allocated memory is still 58.7 MB. Free memory was 38.0 MB in the beginning and 26.9 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 71.57 ms. Allocated memory is still 58.7 MB. Free memory was 26.9 MB in the beginning and 41.3 MB in the end (delta: -14.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.11 ms. Allocated memory is still 58.7 MB. Free memory was 41.3 MB in the beginning and 39.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 413.24 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 39.5 MB in the beginning and 45.8 MB in the end (delta: -6.3 MB). Peak memory consumption was 16.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 51050.01 ms. Allocated memory was 71.3 MB in the beginning and 318.8 MB in the end (delta: 247.5 MB). Free memory was 45.5 MB in the beginning and 141.9 MB in the end (delta: -96.4 MB). Peak memory consumption was 150.3 MB. Max. memory is 16.1 GB. * Witness Printer took 30.12 ms. Allocated memory is still 318.8 MB. Free memory was 141.9 MB in the beginning and 137.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int INFINITY = 899; VAL [INFINITY=899] [L18] int nodecount = __VERIFIER_nondet_int(); [L19] int edgecount = __VERIFIER_nondet_int(); [L20] COND FALSE !(!(0 <= nodecount && nodecount <= 4)) VAL [INFINITY=899] [L21] COND FALSE !(!(0 <= edgecount && edgecount <= 19)) [L22] int source = 0; [L23] int Source[20] = {0,4,1,1,0,0,1,3,4,4,2,2,3,0,0,3,1,2,2,3}; [L24] int Dest[20] = {1,3,4,1,1,4,3,4,3,0,0,0,0,2,3,0,2,1,0,4}; [L25] int Weight[20] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19}; [L26] int distance[5]; [L27] int x,y; [L28] int i,j; [L30] i = 0 VAL [INFINITY=899] [L30] COND TRUE i < nodecount VAL [INFINITY=899] [L31] COND TRUE i == source [L32] distance[i] = 0 VAL [INFINITY=899] [L30] i++ VAL [INFINITY=899] [L30] COND TRUE i < nodecount VAL [INFINITY=899] [L31] COND FALSE !(i == source) [L35] distance[i] = INFINITY VAL [INFINITY=899] [L30] i++ VAL [INFINITY=899] [L30] COND FALSE !(i < nodecount) VAL [INFINITY=899] [L39] i = 0 VAL [INFINITY=899] [L39] COND TRUE i < nodecount [L41] j = 0 VAL [INFINITY=899] [L41] COND TRUE j < edgecount [L43] EXPR Dest[j] [L43] x = Dest[j] [L44] EXPR Source[j] [L44] y = Source[j] [L45] EXPR distance[x] [L45] EXPR distance[y] [L45] EXPR Weight[j] VAL [INFINITY=899] [L45] COND TRUE distance[x] > distance[y] + Weight[j] [L47] distance[x] = -1 VAL [INFINITY=899] [L41] j++ VAL [INFINITY=899] [L41] COND FALSE !(j < edgecount) VAL [INFINITY=899] [L39] i++ VAL [INFINITY=899] [L39] COND TRUE i < nodecount [L41] j = 0 VAL [INFINITY=899] [L41] COND TRUE j < edgecount [L43] EXPR Dest[j] [L43] x = Dest[j] [L44] EXPR Source[j] [L44] y = Source[j] [L45] EXPR distance[x] [L45] EXPR distance[y] [L45] EXPR Weight[j] VAL [INFINITY=899] [L45] COND FALSE !(distance[x] > distance[y] + Weight[j]) [L41] j++ VAL [INFINITY=899] [L41] COND FALSE !(j < edgecount) VAL [INFINITY=899] [L39] i++ VAL [INFINITY=899] [L39] COND FALSE !(i < nodecount) VAL [INFINITY=899] [L51] i = 0 VAL [INFINITY=899] [L51] COND TRUE i < edgecount [L53] EXPR Dest[i] [L53] x = Dest[i] [L54] EXPR Source[i] [L54] y = Source[i] [L55] EXPR distance[x] [L55] EXPR distance[y] [L55] EXPR Weight[i] VAL [INFINITY=899] [L55] COND FALSE !(distance[x] > distance[y] + Weight[i]) [L51] i++ VAL [INFINITY=899] [L51] COND FALSE !(i < edgecount) VAL [INFINITY=899] [L61] i = 0 VAL [INFINITY=899] [L61] COND TRUE i < nodecount [L63] distance[i] [L11] COND FALSE !(!(cond)) VAL [INFINITY=899] [L61] i++ VAL [INFINITY=899] [L61] COND TRUE i < nodecount [L63] distance[i] [L11] COND TRUE !(cond) VAL [INFINITY=899] [L12] reach_error() VAL [INFINITY=899] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 50958.1ms, OverallIterations: 19, TraceHistogramMax: 3, EmptinessCheckTime: 17.0ms, AutomataDifference: 28673.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 618 SDtfs, 3836 SDslu, 3007 SDs, 0 SdLazy, 4732 SolverSat, 1901 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 5296.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 899 GetRequests, 367 SyntacticMatches, 16 SemanticMatches, 516 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15562 ImplicationChecksByTransitivity, 26984.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=469occurred in iteration=16, InterpolantAutomatonStates: 414, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 239.8ms AutomataMinimizationTime, 18 MinimizatonAttempts, 2434 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 185.8ms SsaConstructionTime, 1118.0ms SatisfiabilityAnalysisTime, 14763.3ms InterpolantComputationTime, 959 NumberOfCodeBlocks, 956 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 888 ConstructedInterpolants, 73 QuantifiedInterpolants, 13564 SizeOfPredicates, 124 NumberOfNonLiveVariables, 3731 ConjunctsInSsa, 245 ConjunctsInUnsatCore, 33 InterpolantComputations, 4 PerfectInterpolantSequences, 156/363 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-26 03:03:06,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...