./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf 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/nla-digbench-scaling/cohencu-ll_unwindbound20.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 0f6ca7f05650411d2b7c464cc16fd3aac4e73d16 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-wip.dd.seqcomp-5fbdf5b [2021-08-29 12:03:13,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 12:03:13,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 12:03:13,475 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 12:03:13,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 12:03:13,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 12:03:13,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 12:03:13,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 12:03:13,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 12:03:13,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 12:03:13,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 12:03:13,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 12:03:13,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 12:03:13,494 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 12:03:13,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 12:03:13,503 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 12:03:13,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 12:03:13,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 12:03:13,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 12:03:13,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 12:03:13,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 12:03:13,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 12:03:13,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 12:03:13,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 12:03:13,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 12:03:13,524 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 12:03:13,524 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 12:03:13,525 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 12:03:13,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 12:03:13,525 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 12:03:13,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 12:03:13,526 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 12:03:13,527 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 12:03:13,527 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 12:03:13,528 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 12:03:13,528 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 12:03:13,529 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 12:03:13,529 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 12:03:13,529 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 12:03:13,530 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 12:03:13,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 12:03:13,531 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 12:03:13,557 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 12:03:13,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 12:03:13,557 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 12:03:13,557 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 12:03:13,559 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 12:03:13,559 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 12:03:13,559 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 12:03:13,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 12:03:13,559 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 12:03:13,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 12:03:13,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 12:03:13,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 12:03:13,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 12:03:13,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 12:03:13,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 12:03:13,561 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 12:03:13,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 12:03:13,561 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 12:03:13,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 12:03:13,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 12:03:13,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 12:03:13,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 12:03:13,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 12:03:13,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 12:03:13,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 12:03:13,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 12:03:13,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 12:03:13,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 12:03:13,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 12:03:13,563 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 12:03:13,564 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f6ca7f05650411d2b7c464cc16fd3aac4e73d16 [2021-08-29 12:03:13,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 12:03:13,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 12:03:13,851 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 12:03:13,852 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 12:03:13,853 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 12:03:13,854 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound20.c [2021-08-29 12:03:13,922 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec2d33396/2d9463bce3b44d31b765ce1286e1f883/FLAG157a1b546 [2021-08-29 12:03:14,354 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 12:03:14,355 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound20.c [2021-08-29 12:03:14,361 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec2d33396/2d9463bce3b44d31b765ce1286e1f883/FLAG157a1b546 [2021-08-29 12:03:14,746 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec2d33396/2d9463bce3b44d31b765ce1286e1f883 [2021-08-29 12:03:14,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 12:03:14,750 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 12:03:14,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 12:03:14,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 12:03:14,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 12:03:14,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 12:03:14" (1/1) ... [2021-08-29 12:03:14,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@205ebd46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:03:14, skipping insertion in model container [2021-08-29 12:03:14,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 12:03:14" (1/1) ... [2021-08-29 12:03:14,762 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 12:03:14,774 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 12:03:14,926 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/nla-digbench-scaling/cohencu-ll_unwindbound20.c[596,609] [2021-08-29 12:03:14,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 12:03:14,952 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 12:03:14,963 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/nla-digbench-scaling/cohencu-ll_unwindbound20.c[596,609] [2021-08-29 12:03:14,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 12:03:15,004 INFO L208 MainTranslator]: Completed translation [2021-08-29 12:03:15,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:03:15 WrapperNode [2021-08-29 12:03:15,005 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 12:03:15,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 12:03:15,008 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 12:03:15,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 12:03:15,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:03:15" (1/1) ... [2021-08-29 12:03:15,039 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:03:15" (1/1) ... [2021-08-29 12:03:15,066 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 12:03:15,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 12:03:15,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 12:03:15,068 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 12:03:15,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:03:15" (1/1) ... [2021-08-29 12:03:15,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:03:15" (1/1) ... [2021-08-29 12:03:15,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:03:15" (1/1) ... [2021-08-29 12:03:15,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:03:15" (1/1) ... [2021-08-29 12:03:15,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:03:15" (1/1) ... [2021-08-29 12:03:15,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:03:15" (1/1) ... [2021-08-29 12:03:15,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:03:15" (1/1) ... [2021-08-29 12:03:15,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 12:03:15,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 12:03:15,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 12:03:15,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 12:03:15,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:03:15" (1/1) ... [2021-08-29 12:03:15,106 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 12:03:15,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:03:15,122 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) [2021-08-29 12:03:15,140 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 [2021-08-29 12:03:15,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 12:03:15,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_short [2021-08-29 12:03:15,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 12:03:15,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 12:03:15,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 12:03:15,305 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 12:03:15,305 INFO L299 CfgBuilder]: Removed 27 assume(true) statements. [2021-08-29 12:03:15,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 12:03:15 BoogieIcfgContainer [2021-08-29 12:03:15,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 12:03:15,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 12:03:15,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 12:03:15,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 12:03:15,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 12:03:14" (1/3) ... [2021-08-29 12:03:15,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bfc3a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 12:03:15, skipping insertion in model container [2021-08-29 12:03:15,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:03:15" (2/3) ... [2021-08-29 12:03:15,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bfc3a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 12:03:15, skipping insertion in model container [2021-08-29 12:03:15,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 12:03:15" (3/3) ... [2021-08-29 12:03:15,314 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound20.c [2021-08-29 12:03:15,318 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 12:03:15,318 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-08-29 12:03:15,370 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 12:03:15,377 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 [2021-08-29 12:03:15,377 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-08-29 12:03:15,390 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 40 states have (on average 1.625) internal successors, (65), 51 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) [2021-08-29 12:03:15,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-29 12:03:15,394 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:03:15,395 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-29 12:03:15,395 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-08-29 12:03:15,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:03:15,405 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-08-29 12:03:15,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:03:15,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142570361] [2021-08-29 12:03:15,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:03:15,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:03:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:03:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:03:15,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:03:15,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142570361] [2021-08-29 12:03:15,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142570361] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:03:15,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:03:15,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 12:03:15,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845120378] [2021-08-29 12:03:15,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 12:03:15,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:03:15,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 12:03:15,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 12:03:15,681 INFO L87 Difference]: Start difference. First operand has 52 states, 40 states have (on average 1.625) internal successors, (65), 51 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) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:15,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:03:15,858 INFO L93 Difference]: Finished difference Result 101 states and 129 transitions. [2021-08-29 12:03:15,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 12:03:15,860 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-08-29 12:03:15,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:03:15,864 INFO L225 Difference]: With dead ends: 101 [2021-08-29 12:03:15,867 INFO L226 Difference]: Without dead ends: 47 [2021-08-29 12:03:15,869 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.79ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 12:03:15,872 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 44 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.45ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 137.51ms IncrementalHoareTripleChecker+Time [2021-08-29 12:03:15,873 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 0 Invalid, 107 Unknown, 0 Unchecked, 1.45ms Time], IncrementalHoareTripleChecker [22 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 137.51ms Time] [2021-08-29 12:03:15,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-08-29 12:03:15,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-08-29 12:03:15,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:15,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-08-29 12:03:15,908 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 6 [2021-08-29 12:03:15,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:03:15,908 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-08-29 12:03:15,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:15,909 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-08-29 12:03:15,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-29 12:03:15,910 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:03:15,910 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:03:15,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 12:03:15,913 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-08-29 12:03:15,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:03:15,915 INFO L82 PathProgramCache]: Analyzing trace with hash 179657965, now seen corresponding path program 1 times [2021-08-29 12:03:15,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:03:15,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147929125] [2021-08-29 12:03:15,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:03:15,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:03:15,930 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:03:15,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [560643728] [2021-08-29 12:03:15,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:03:15,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:03:15,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:03:15,936 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) [2021-08-29 12:03:15,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 12:03:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:03:15,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-29 12:03:15,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:03:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:03:16,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:03:16,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:03:16,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147929125] [2021-08-29 12:03:16,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:03:16,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560643728] [2021-08-29 12:03:16,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560643728] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:03:16,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:03:16,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 12:03:16,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667190073] [2021-08-29 12:03:16,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 12:03:16,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:03:16,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 12:03:16,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 12:03:16,062 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:16,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:03:16,174 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2021-08-29 12:03:16,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 12:03:16,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-08-29 12:03:16,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:03:16,175 INFO L225 Difference]: With dead ends: 86 [2021-08-29 12:03:16,175 INFO L226 Difference]: Without dead ends: 84 [2021-08-29 12:03:16,176 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.42ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 12:03:16,177 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.95ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 96.45ms IncrementalHoareTripleChecker+Time [2021-08-29 12:03:16,177 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 135 Unknown, 0 Unchecked, 0.95ms Time], IncrementalHoareTripleChecker [1 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 96.45ms Time] [2021-08-29 12:03:16,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-29 12:03:16,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 49. [2021-08-29 12:03:16,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.275) internal successors, (51), 48 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:16,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2021-08-29 12:03:16,184 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 8 [2021-08-29 12:03:16,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:03:16,184 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2021-08-29 12:03:16,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:16,184 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2021-08-29 12:03:16,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-29 12:03:16,185 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:03:16,185 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:03:16,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-29 12:03:16,402 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 [2021-08-29 12:03:16,403 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-08-29 12:03:16,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:03:16,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1269812074, now seen corresponding path program 1 times [2021-08-29 12:03:16,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:03:16,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230327106] [2021-08-29 12:03:16,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:03:16,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:03:16,434 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:03:16,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981006362] [2021-08-29 12:03:16,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:03:16,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:03:16,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:03:16,439 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) [2021-08-29 12:03:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:03:16,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 12:03:16,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-29 12:03:16,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:03:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:03:16,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:03:16,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:03:16,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230327106] [2021-08-29 12:03:16,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:03:16,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981006362] [2021-08-29 12:03:16,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981006362] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:03:16,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:03:16,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 12:03:16,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992597302] [2021-08-29 12:03:16,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 12:03:16,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:03:16,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 12:03:16,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 12:03:16,528 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:16,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:03:16,598 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2021-08-29 12:03:16,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 12:03:16,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-08-29 12:03:16,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:03:16,600 INFO L225 Difference]: With dead ends: 71 [2021-08-29 12:03:16,600 INFO L226 Difference]: Without dead ends: 49 [2021-08-29 12:03:16,600 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.31ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 12:03:16,601 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.79ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.68ms IncrementalHoareTripleChecker+Time [2021-08-29 12:03:16,601 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 133 Unknown, 0 Unchecked, 0.79ms Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 64.68ms Time] [2021-08-29 12:03:16,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-29 12:03:16,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-08-29 12:03:16,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.25) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:16,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-08-29 12:03:16,606 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 9 [2021-08-29 12:03:16,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:03:16,606 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-08-29 12:03:16,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:16,606 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-08-29 12:03:16,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-29 12:03:16,607 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:03:16,607 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:03:16,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 12:03:16,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-29 12:03:16,825 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-08-29 12:03:16,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:03:16,826 INFO L82 PathProgramCache]: Analyzing trace with hash 852768432, now seen corresponding path program 1 times [2021-08-29 12:03:16,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:03:16,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262704886] [2021-08-29 12:03:16,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:03:16,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:03:16,836 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:03:16,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689382374] [2021-08-29 12:03:16,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:03:16,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:03:16,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:03:16,839 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) [2021-08-29 12:03:16,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-29 12:03:16,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:03:16,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-29 12:03:16,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:03:16,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:03:16,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:03:16,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:03:16,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262704886] [2021-08-29 12:03:16,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:03:16,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689382374] [2021-08-29 12:03:16,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689382374] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:03:16,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:03:16,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 12:03:16,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099393024] [2021-08-29 12:03:16,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 12:03:16,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:03:16,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 12:03:16,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 12:03:16,954 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:17,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:03:17,070 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2021-08-29 12:03:17,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 12:03:17,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-29 12:03:17,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:03:17,071 INFO L225 Difference]: With dead ends: 84 [2021-08-29 12:03:17,071 INFO L226 Difference]: Without dead ends: 80 [2021-08-29 12:03:17,071 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.24ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 12:03:17,072 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 81.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.79ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 103.74ms IncrementalHoareTripleChecker+Time [2021-08-29 12:03:17,072 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 137 Unknown, 0 Unchecked, 0.79ms Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 103.74ms Time] [2021-08-29 12:03:17,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-29 12:03:17,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2021-08-29 12:03:17,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:17,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-08-29 12:03:17,077 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 10 [2021-08-29 12:03:17,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:03:17,077 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-08-29 12:03:17,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:17,077 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-08-29 12:03:17,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-29 12:03:17,078 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:03:17,078 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:03:17,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-29 12:03:17,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:03:17,279 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-08-29 12:03:17,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:03:17,279 INFO L82 PathProgramCache]: Analyzing trace with hash -828134125, now seen corresponding path program 1 times [2021-08-29 12:03:17,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:03:17,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521600380] [2021-08-29 12:03:17,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:03:17,280 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:03:17,286 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:03:17,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603678720] [2021-08-29 12:03:17,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:03:17,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:03:17,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:03:17,292 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) [2021-08-29 12:03:17,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-29 12:03:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:03:17,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-29 12:03:17,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:03:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:03:17,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:03:17,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:03:17,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521600380] [2021-08-29 12:03:17,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:03:17,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603678720] [2021-08-29 12:03:17,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603678720] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:03:17,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:03:17,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 12:03:17,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997837391] [2021-08-29 12:03:17,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 12:03:17,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:03:17,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 12:03:17,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 12:03:17,413 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:17,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:03:17,522 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2021-08-29 12:03:17,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 12:03:17,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-29 12:03:17,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:03:17,528 INFO L225 Difference]: With dead ends: 83 [2021-08-29 12:03:17,528 INFO L226 Difference]: Without dead ends: 59 [2021-08-29 12:03:17,529 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.52ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 12:03:17,529 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.70ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 96.34ms IncrementalHoareTripleChecker+Time [2021-08-29 12:03:17,529 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 155 Unknown, 0 Unchecked, 0.70ms Time], IncrementalHoareTripleChecker [18 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 96.34ms Time] [2021-08-29 12:03:17,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-29 12:03:17,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-08-29 12:03:17,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:17,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-08-29 12:03:17,535 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 12 [2021-08-29 12:03:17,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:03:17,535 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-08-29 12:03:17,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:17,536 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-08-29 12:03:17,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-29 12:03:17,536 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:03:17,536 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:03:17,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-29 12:03:17,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:03:17,737 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-08-29 12:03:17,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:03:17,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1416701979, now seen corresponding path program 1 times [2021-08-29 12:03:17,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:03:17,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57036804] [2021-08-29 12:03:17,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:03:17,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:03:17,748 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:03:17,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138626643] [2021-08-29 12:03:17,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:03:17,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:03:17,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:03:17,750 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) [2021-08-29 12:03:17,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-29 12:03:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:03:17,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-29 12:03:17,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:03:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:03:17,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:03:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:03:17,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:03:17,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57036804] [2021-08-29 12:03:17,996 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:03:17,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138626643] [2021-08-29 12:03:17,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138626643] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:03:17,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:03:17,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-29 12:03:17,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137581952] [2021-08-29 12:03:17,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-29 12:03:17,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:03:17,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-29 12:03:17,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-29 12:03:17,998 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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) [2021-08-29 12:03:18,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:03:18,202 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2021-08-29 12:03:18,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 12:03:18,203 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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 20 [2021-08-29 12:03:18,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:03:18,203 INFO L225 Difference]: With dead ends: 92 [2021-08-29 12:03:18,204 INFO L226 Difference]: Without dead ends: 86 [2021-08-29 12:03:18,204 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 55.23ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-29 12:03:18,204 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 125 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 133.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.40ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 152.74ms IncrementalHoareTripleChecker+Time [2021-08-29 12:03:18,205 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 0 Invalid, 201 Unknown, 0 Unchecked, 1.40ms Time], IncrementalHoareTripleChecker [39 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 152.74ms Time] [2021-08-29 12:03:18,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-29 12:03:18,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 50. [2021-08-29 12:03:18,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:18,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-08-29 12:03:18,210 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 20 [2021-08-29 12:03:18,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:03:18,210 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-08-29 12:03:18,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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) [2021-08-29 12:03:18,210 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-08-29 12:03:18,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-29 12:03:18,211 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:03:18,211 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:03:18,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-29 12:03:18,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:03:18,428 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-08-29 12:03:18,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:03:18,428 INFO L82 PathProgramCache]: Analyzing trace with hash -972705934, now seen corresponding path program 1 times [2021-08-29 12:03:18,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:03:18,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926222418] [2021-08-29 12:03:18,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:03:18,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:03:18,435 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:03:18,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371448404] [2021-08-29 12:03:18,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:03:18,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:03:18,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:03:18,443 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) [2021-08-29 12:03:18,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-29 12:03:18,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:03:18,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-29 12:03:18,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:03:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:03:18,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:03:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:03:18,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:03:18,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926222418] [2021-08-29 12:03:18,587 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:03:18,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371448404] [2021-08-29 12:03:18,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371448404] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:03:18,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:03:18,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-08-29 12:03:18,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275274280] [2021-08-29 12:03:18,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-29 12:03:18,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:03:18,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-29 12:03:18,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-29 12:03:18,591 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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) [2021-08-29 12:03:18,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:03:18,779 INFO L93 Difference]: Finished difference Result 144 states and 147 transitions. [2021-08-29 12:03:18,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-29 12:03:18,780 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 21 [2021-08-29 12:03:18,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:03:18,780 INFO L225 Difference]: With dead ends: 144 [2021-08-29 12:03:18,780 INFO L226 Difference]: Without dead ends: 124 [2021-08-29 12:03:18,781 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 34.21ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-29 12:03:18,781 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 69 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 112.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.37ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 148.26ms IncrementalHoareTripleChecker+Time [2021-08-29 12:03:18,781 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 0 Invalid, 245 Unknown, 0 Unchecked, 1.37ms Time], IncrementalHoareTripleChecker [5 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 148.26ms Time] [2021-08-29 12:03:18,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-08-29 12:03:18,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 76. [2021-08-29 12:03:18,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 75 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:18,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2021-08-29 12:03:18,796 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 21 [2021-08-29 12:03:18,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:03:18,797 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2021-08-29 12:03:18,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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) [2021-08-29 12:03:18,797 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2021-08-29 12:03:18,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-29 12:03:18,797 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:03:18,798 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:03:18,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-29 12:03:19,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:03:19,016 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-08-29 12:03:19,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:03:19,016 INFO L82 PathProgramCache]: Analyzing trace with hash 54186920, now seen corresponding path program 1 times [2021-08-29 12:03:19,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:03:19,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829387140] [2021-08-29 12:03:19,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:03:19,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:03:19,024 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:03:19,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183625793] [2021-08-29 12:03:19,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:03:19,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:03:19,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:03:19,025 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) [2021-08-29 12:03:19,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-29 12:03:19,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:03:19,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-29 12:03:19,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:03:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:03:19,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:03:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:03:19,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:03:19,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829387140] [2021-08-29 12:03:19,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:03:19,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183625793] [2021-08-29 12:03:19,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183625793] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:03:19,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:03:19,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-29 12:03:19,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672777377] [2021-08-29 12:03:19,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-29 12:03:19,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:03:19,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-29 12:03:19,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-29 12:03:19,269 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:19,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:03:19,412 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2021-08-29 12:03:19,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 12:03:19,413 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-29 12:03:19,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:03:19,413 INFO L225 Difference]: With dead ends: 100 [2021-08-29 12:03:19,413 INFO L226 Difference]: Without dead ends: 98 [2021-08-29 12:03:19,414 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.56ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-29 12:03:19,414 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 34 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.91ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 118.96ms IncrementalHoareTripleChecker+Time [2021-08-29 12:03:19,414 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 0 Invalid, 258 Unknown, 0 Unchecked, 0.91ms Time], IncrementalHoareTripleChecker [5 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 118.96ms Time] [2021-08-29 12:03:19,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-29 12:03:19,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 76. [2021-08-29 12:03:19,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 75 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:19,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2021-08-29 12:03:19,429 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 22 [2021-08-29 12:03:19,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:03:19,429 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2021-08-29 12:03:19,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:19,429 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2021-08-29 12:03:19,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-29 12:03:19,430 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:03:19,430 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:03:19,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-29 12:03:19,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:03:19,648 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-08-29 12:03:19,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:03:19,648 INFO L82 PathProgramCache]: Analyzing trace with hash 534178827, now seen corresponding path program 1 times [2021-08-29 12:03:19,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:03:19,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781559643] [2021-08-29 12:03:19,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:03:19,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:03:19,655 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:03:19,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554425178] [2021-08-29 12:03:19,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:03:19,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:03:19,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:03:19,656 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) [2021-08-29 12:03:19,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-29 12:03:19,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:03:19,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-29 12:03:19,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:03:19,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:03:19,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:03:20,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:03:20,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:03:20,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781559643] [2021-08-29 12:03:20,047 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:03:20,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554425178] [2021-08-29 12:03:20,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554425178] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:03:20,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:03:20,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-29 12:03:20,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020883429] [2021-08-29 12:03:20,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-29 12:03:20,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:03:20,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-29 12:03:20,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-29 12:03:20,048 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:20,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:03:20,244 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2021-08-29 12:03:20,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 12:03:20,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 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 24 [2021-08-29 12:03:20,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:03:20,245 INFO L225 Difference]: With dead ends: 92 [2021-08-29 12:03:20,245 INFO L226 Difference]: Without dead ends: 74 [2021-08-29 12:03:20,245 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 155.27ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-29 12:03:20,246 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 128.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.64ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 144.06ms IncrementalHoareTripleChecker+Time [2021-08-29 12:03:20,246 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 0 Invalid, 174 Unknown, 0 Unchecked, 0.64ms Time], IncrementalHoareTripleChecker [40 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 144.06ms Time] [2021-08-29 12:03:20,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-29 12:03:20,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2021-08-29 12:03:20,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 63 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:20,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-08-29 12:03:20,253 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 24 [2021-08-29 12:03:20,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:03:20,253 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-08-29 12:03:20,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:20,253 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-08-29 12:03:20,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-29 12:03:20,254 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:03:20,254 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:03:20,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-29 12:03:20,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-08-29 12:03:20,465 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-08-29 12:03:20,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:03:20,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1750673281, now seen corresponding path program 1 times [2021-08-29 12:03:20,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:03:20,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537708898] [2021-08-29 12:03:20,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:03:20,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:03:20,477 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:03:20,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543781001] [2021-08-29 12:03:20,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:03:20,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:03:20,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:03:20,483 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) [2021-08-29 12:03:20,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-29 12:03:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:03:20,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-29 12:03:20,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:03:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:03:20,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:03:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:03:21,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:03:21,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537708898] [2021-08-29 12:03:21,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:03:21,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543781001] [2021-08-29 12:03:21,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543781001] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:03:21,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:03:21,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-29 12:03:21,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659761026] [2021-08-29 12:03:21,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-29 12:03:21,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:03:21,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-29 12:03:21,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-29 12:03:21,116 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:21,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:03:21,343 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2021-08-29 12:03:21,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 12:03:21,344 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 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 [2021-08-29 12:03:21,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:03:21,344 INFO L225 Difference]: With dead ends: 74 [2021-08-29 12:03:21,344 INFO L226 Difference]: Without dead ends: 72 [2021-08-29 12:03:21,344 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 108.76ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-29 12:03:21,345 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 169.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.60ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 185.13ms IncrementalHoareTripleChecker+Time [2021-08-29 12:03:21,345 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 212 Unknown, 0 Unchecked, 0.60ms Time], IncrementalHoareTripleChecker [15 Valid, 166 Invalid, 0 Unknown, 31 Unchecked, 185.13ms Time] [2021-08-29 12:03:21,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-29 12:03:21,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2021-08-29 12:03:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 67 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) [2021-08-29 12:03:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-08-29 12:03:21,351 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 31 [2021-08-29 12:03:21,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:03:21,352 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-08-29 12:03:21,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:21,352 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-08-29 12:03:21,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-29 12:03:21,353 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:03:21,353 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:03:21,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-29 12:03:21,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-29 12:03:21,569 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-08-29 12:03:21,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:03:21,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1230314914, now seen corresponding path program 1 times [2021-08-29 12:03:21,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:03:21,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316222047] [2021-08-29 12:03:21,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:03:21,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:03:21,580 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:03:21,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476124555] [2021-08-29 12:03:21,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:03:21,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:03:21,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:03:21,591 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) [2021-08-29 12:03:21,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-29 12:03:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:03:21,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-29 12:03:21,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:03:21,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:03:21,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:03:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:03:22,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:03:22,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316222047] [2021-08-29 12:03:22,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:03:22,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476124555] [2021-08-29 12:03:22,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476124555] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:03:22,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:03:22,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-29 12:03:22,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643369985] [2021-08-29 12:03:22,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-29 12:03:22,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:03:22,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-29 12:03:22,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-29 12:03:22,235 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:22,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:03:22,399 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2021-08-29 12:03:22,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 12:03:22,400 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 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 [2021-08-29 12:03:22,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:03:22,400 INFO L225 Difference]: With dead ends: 72 [2021-08-29 12:03:22,400 INFO L226 Difference]: Without dead ends: 64 [2021-08-29 12:03:22,400 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 92.00ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-29 12:03:22,401 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 103.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.70ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 120.72ms IncrementalHoareTripleChecker+Time [2021-08-29 12:03:22,401 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 268 Unknown, 0 Unchecked, 0.70ms Time], IncrementalHoareTripleChecker [3 Valid, 222 Invalid, 0 Unknown, 43 Unchecked, 120.72ms Time] [2021-08-29 12:03:22,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-29 12:03:22,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-08-29 12:03:22,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 61 states have (on average 1.098360655737705) internal successors, (67), 63 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:22,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2021-08-29 12:03:22,410 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 33 [2021-08-29 12:03:22,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:03:22,411 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2021-08-29 12:03:22,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:22,411 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2021-08-29 12:03:22,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-29 12:03:22,413 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:03:22,413 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-08-29 12:03:22,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-29 12:03:22,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-29 12:03:22,629 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-08-29 12:03:22,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:03:22,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1367719072, now seen corresponding path program 2 times [2021-08-29 12:03:22,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:03:22,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093404533] [2021-08-29 12:03:22,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:03:22,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:03:22,636 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:03:22,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375024139] [2021-08-29 12:03:22,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 12:03:22,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:03:22,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:03:22,641 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) [2021-08-29 12:03:22,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-29 12:03:22,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 12:03:22,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 12:03:22,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-29 12:03:22,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:03:23,000 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:03:23,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:03:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:03:23,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:03:23,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093404533] [2021-08-29 12:03:23,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:03:23,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375024139] [2021-08-29 12:03:23,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375024139] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:03:23,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:03:23,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-29 12:03:23,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575567187] [2021-08-29 12:03:23,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-29 12:03:23,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:03:23,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-29 12:03:23,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-29 12:03:23,224 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 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) [2021-08-29 12:03:23,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:03:23,832 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2021-08-29 12:03:23,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-29 12:03:23,832 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 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 34 [2021-08-29 12:03:23,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:03:23,833 INFO L225 Difference]: With dead ends: 124 [2021-08-29 12:03:23,833 INFO L226 Difference]: Without dead ends: 122 [2021-08-29 12:03:23,833 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 323.23ms TimeCoverageRelationStatistics Valid=188, Invalid=462, Unknown=0, NotChecked=0, Total=650 [2021-08-29 12:03:23,834 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 139 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 322.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.63ms SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 358.00ms IncrementalHoareTripleChecker+Time [2021-08-29 12:03:23,834 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 0 Invalid, 464 Unknown, 0 Unchecked, 1.63ms Time], IncrementalHoareTripleChecker [47 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 358.00ms Time] [2021-08-29 12:03:23,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-08-29 12:03:23,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 81. [2021-08-29 12:03:23,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 78 states have (on average 1.0897435897435896) internal successors, (85), 80 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:23,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2021-08-29 12:03:23,849 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 34 [2021-08-29 12:03:23,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:03:23,849 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2021-08-29 12:03:23,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 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) [2021-08-29 12:03:23,850 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2021-08-29 12:03:23,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-29 12:03:23,850 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:03:23,850 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:03:23,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-29 12:03:24,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-29 12:03:24,067 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-08-29 12:03:24,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:03:24,067 INFO L82 PathProgramCache]: Analyzing trace with hash -230259065, now seen corresponding path program 2 times [2021-08-29 12:03:24,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:03:24,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258342218] [2021-08-29 12:03:24,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:03:24,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:03:24,073 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:03:24,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127776078] [2021-08-29 12:03:24,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 12:03:24,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:03:24,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:03:24,093 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) [2021-08-29 12:03:24,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-29 12:03:24,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 12:03:24,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 12:03:24,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-29 12:03:24,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:03:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:03:24,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:03:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:03:25,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:03:25,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258342218] [2021-08-29 12:03:25,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:03:25,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127776078] [2021-08-29 12:03:25,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127776078] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:03:25,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:03:25,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-29 12:03:25,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894853219] [2021-08-29 12:03:25,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-29 12:03:25,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:03:25,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-29 12:03:25,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-29 12:03:25,308 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:25,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:03:25,625 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2021-08-29 12:03:25,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-29 12:03:25,626 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-29 12:03:25,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:03:25,627 INFO L225 Difference]: With dead ends: 99 [2021-08-29 12:03:25,627 INFO L226 Difference]: Without dead ends: 97 [2021-08-29 12:03:25,627 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 466.26ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-08-29 12:03:25,628 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 156.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.79ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 174.93ms IncrementalHoareTripleChecker+Time [2021-08-29 12:03:25,628 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 327 Unknown, 0 Unchecked, 0.79ms Time], IncrementalHoareTripleChecker [21 Valid, 206 Invalid, 0 Unknown, 100 Unchecked, 174.93ms Time] [2021-08-29 12:03:25,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-29 12:03:25,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 85. [2021-08-29 12:03:25,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 82 states have (on average 1.0853658536585367) internal successors, (89), 84 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:25,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2021-08-29 12:03:25,636 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 43 [2021-08-29 12:03:25,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:03:25,636 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2021-08-29 12:03:25,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:03:25,636 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2021-08-29 12:03:25,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-29 12:03:25,643 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:03:25,643 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:03:25,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-08-29 12:03:25,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-29 12:03:25,844 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-08-29 12:03:25,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:03:25,844 INFO L82 PathProgramCache]: Analyzing trace with hash 2059495850, now seen corresponding path program 2 times [2021-08-29 12:03:25,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:03:25,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286262421] [2021-08-29 12:03:25,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:03:25,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:03:25,849 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:03:25,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237984724] [2021-08-29 12:03:25,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 12:03:25,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:03:25,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:03:25,871 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) [2021-08-29 12:03:25,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-29 12:03:26,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-29 12:03:26,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 12:03:26,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-29 12:03:26,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:03:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-29 12:03:39,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:03:39,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:03:39,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286262421] [2021-08-29 12:03:39,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:03:39,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237984724] [2021-08-29 12:03:39,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237984724] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:03:39,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:03:39,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-08-29 12:03:39,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172154443] [2021-08-29 12:03:39,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-29 12:03:39,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:03:39,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-29 12:03:39,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=133, Unknown=1, NotChecked=0, Total=182 [2021-08-29 12:03:39,075 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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) [2021-08-29 12:03:41,232 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:03:43,986 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:03:45,789 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:03:47,479 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:03:50,236 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:03:52,341 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:03:54,541 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:03:56,552 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:03:58,600 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:04:01,450 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:04:06,580 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:04:11,094 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:04:16,441 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:04:19,078 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:04:25,144 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:04:27,149 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:04:28,685 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:04:28,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:04:28,685 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2021-08-29 12:04:28,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-29 12:04:28,687 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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) Word has length 45 [2021-08-29 12:04:28,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:04:28,688 INFO L225 Difference]: With dead ends: 95 [2021-08-29 12:04:28,688 INFO L226 Difference]: Without dead ends: 87 [2021-08-29 12:04:28,688 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 18478.85ms TimeCoverageRelationStatistics Valid=131, Invalid=286, Unknown=3, NotChecked=0, Total=420 [2021-08-29 12:04:28,689 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 33 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37773.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.06ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37833.20ms IncrementalHoareTripleChecker+Time [2021-08-29 12:04:28,689 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 246 Unknown, 0 Unchecked, 2.06ms Time], IncrementalHoareTripleChecker [33 Valid, 202 Invalid, 11 Unknown, 0 Unchecked, 37833.20ms Time] [2021-08-29 12:04:28,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-08-29 12:04:28,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2021-08-29 12:04:28,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 82 states have (on average 1.0609756097560976) internal successors, (87), 84 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:04:28,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2021-08-29 12:04:28,718 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 45 [2021-08-29 12:04:28,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:04:28,718 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2021-08-29 12:04:28,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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) [2021-08-29 12:04:28,719 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2021-08-29 12:04:28,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-29 12:04:28,720 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:04:28,720 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:04:28,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-29 12:04:28,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-29 12:04:28,926 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-08-29 12:04:28,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:04:28,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1986227318, now seen corresponding path program 2 times [2021-08-29 12:04:28,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:04:28,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311024366] [2021-08-29 12:04:28,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:04:28,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:04:28,931 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:04:28,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861649209] [2021-08-29 12:04:28,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 12:04:28,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:04:28,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:04:28,938 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) [2021-08-29 12:04:28,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-29 12:04:28,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 12:04:28,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 12:04:28,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-29 12:04:28,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:04:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:04:29,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:04:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:04:29,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:04:29,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311024366] [2021-08-29 12:04:29,245 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:04:29,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861649209] [2021-08-29 12:04:29,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861649209] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:04:29,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:04:29,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-29 12:04:29,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434129285] [2021-08-29 12:04:29,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-29 12:04:29,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:04:29,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-29 12:04:29,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-08-29 12:04:29,246 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 13 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:04:29,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:04:29,490 INFO L93 Difference]: Finished difference Result 188 states and 194 transitions. [2021-08-29 12:04:29,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-29 12:04:29,491 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 13 states have internal predecessors, (109), 0 states have call successors, (0), 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 57 [2021-08-29 12:04:29,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:04:29,491 INFO L225 Difference]: With dead ends: 188 [2021-08-29 12:04:29,492 INFO L226 Difference]: Without dead ends: 178 [2021-08-29 12:04:29,492 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 109.90ms TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2021-08-29 12:04:29,493 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 122 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 128.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.35ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 158.11ms IncrementalHoareTripleChecker+Time [2021-08-29 12:04:29,493 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 0 Invalid, 282 Unknown, 0 Unchecked, 1.35ms Time], IncrementalHoareTripleChecker [12 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 158.11ms Time] [2021-08-29 12:04:29,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-08-29 12:04:29,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 140. [2021-08-29 12:04:29,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 137 states have (on average 1.094890510948905) internal successors, (150), 139 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:04:29,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 150 transitions. [2021-08-29 12:04:29,513 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 150 transitions. Word has length 57 [2021-08-29 12:04:29,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:04:29,513 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 150 transitions. [2021-08-29 12:04:29,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 13 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:04:29,514 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 150 transitions. [2021-08-29 12:04:29,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-29 12:04:29,514 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:04:29,514 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:04:29,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-29 12:04:29,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:04:29,729 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-08-29 12:04:29,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:04:29,729 INFO L82 PathProgramCache]: Analyzing trace with hash -60719465, now seen corresponding path program 3 times [2021-08-29 12:04:29,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:04:29,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267344601] [2021-08-29 12:04:29,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:04:29,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:04:29,734 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:04:29,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626611503] [2021-08-29 12:04:29,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 12:04:29,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:04:29,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:04:29,737 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) [2021-08-29 12:04:29,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-29 12:04:30,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-29 12:04:30,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 12:04:30,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-29 12:04:30,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:04:58,957 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 69 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-08-29 12:04:58,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:05:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-08-29 12:05:11,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:05:11,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267344601] [2021-08-29 12:05:11,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:05:11,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626611503] [2021-08-29 12:05:11,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626611503] provided 1 perfect and 1 imperfect interpolant sequences [2021-08-29 12:05:11,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-29 12:05:11,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [16] total 25 [2021-08-29 12:05:11,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677359221] [2021-08-29 12:05:11,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-29 12:05:11,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:05:11,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-29 12:05:11,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=439, Unknown=11, NotChecked=0, Total=600 [2021-08-29 12:05:11,099 INFO L87 Difference]: Start difference. First operand 140 states and 150 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2021-08-29 12:05:20,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:05:20,303 INFO L93 Difference]: Finished difference Result 142 states and 151 transitions. [2021-08-29 12:05:20,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 12:05:20,303 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) Word has length 67 [2021-08-29 12:05:20,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:05:20,305 INFO L225 Difference]: With dead ends: 142 [2021-08-29 12:05:20,305 INFO L226 Difference]: Without dead ends: 136 [2021-08-29 12:05:20,305 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 44385.26ms TimeCoverageRelationStatistics Valid=192, Invalid=553, Unknown=11, NotChecked=0, Total=756 [2021-08-29 12:05:20,305 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 92 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 155.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.58ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 166.81ms IncrementalHoareTripleChecker+Time [2021-08-29 12:05:20,306 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 0 Invalid, 105 Unknown, 0 Unchecked, 0.58ms Time], IncrementalHoareTripleChecker [10 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 166.81ms Time] [2021-08-29 12:05:20,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-08-29 12:05:20,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-08-29 12:05:20,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 133 states have (on average 1.0526315789473684) internal successors, (140), 135 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:05:20,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2021-08-29 12:05:20,330 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 67 [2021-08-29 12:05:20,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:05:20,330 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2021-08-29 12:05:20,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2021-08-29 12:05:20,330 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2021-08-29 12:05:20,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-29 12:05:20,332 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:05:20,332 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1] [2021-08-29 12:05:20,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-29 12:05:20,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-29 12:05:20,532 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-08-29 12:05:20,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:05:20,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1175207816, now seen corresponding path program 3 times [2021-08-29 12:05:20,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:05:20,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920355764] [2021-08-29 12:05:20,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:05:20,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:05:20,541 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:05:20,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101172228] [2021-08-29 12:05:20,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 12:05:20,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:05:20,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:05:20,546 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 12:05:20,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-29 12:05:21,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-29 12:05:21,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 12:05:21,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-29 12:05:21,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:05:23,099 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 40 proven. 35 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-08-29 12:05:23,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:05:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-08-29 12:05:25,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:05:25,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920355764] [2021-08-29 12:05:25,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:05:25,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101172228] [2021-08-29 12:05:25,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101172228] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:05:25,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:05:25,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-29 12:05:25,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909893825] [2021-08-29 12:05:25,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-29 12:05:25,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:05:25,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-29 12:05:25,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-08-29 12:05:25,657 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:05:27,596 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:05:29,240 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:05:29,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:05:29,353 INFO L93 Difference]: Finished difference Result 136 states and 140 transitions. [2021-08-29 12:05:29,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 12:05:29,354 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 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 70 [2021-08-29 12:05:29,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:05:29,355 INFO L225 Difference]: With dead ends: 136 [2021-08-29 12:05:29,355 INFO L226 Difference]: Without dead ends: 134 [2021-08-29 12:05:29,355 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 2707.71ms TimeCoverageRelationStatistics Valid=173, Invalid=427, Unknown=0, NotChecked=0, Total=600 [2021-08-29 12:05:29,356 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 132 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3546.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.81ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3562.28ms IncrementalHoareTripleChecker+Time [2021-08-29 12:05:29,356 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 0 Invalid, 158 Unknown, 0 Unchecked, 0.81ms Time], IncrementalHoareTripleChecker [80 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 3562.28ms Time] [2021-08-29 12:05:29,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-08-29 12:05:29,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-08-29 12:05:29,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 133 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:05:29,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2021-08-29 12:05:29,373 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 70 [2021-08-29 12:05:29,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:05:29,374 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2021-08-29 12:05:29,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:05:29,374 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2021-08-29 12:05:29,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-08-29 12:05:29,375 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:05:29,375 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:05:29,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-29 12:05:29,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-29 12:05:29,582 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-08-29 12:05:29,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:05:29,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1790826426, now seen corresponding path program 3 times [2021-08-29 12:05:29,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:05:29,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507375012] [2021-08-29 12:05:29,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:05:29,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:05:29,588 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:05:29,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894253260] [2021-08-29 12:05:29,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 12:05:29,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:05:29,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:05:29,594 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 12:05:29,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-29 12:05:29,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-29 12:05:29,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 12:05:29,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-29 12:05:29,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:05:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:05:29,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:05:30,282 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:05:30,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:05:30,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507375012] [2021-08-29 12:05:30,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:05:30,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894253260] [2021-08-29 12:05:30,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894253260] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:05:30,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:05:30,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-29 12:05:30,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226796796] [2021-08-29 12:05:30,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-29 12:05:30,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:05:30,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-29 12:05:30,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2021-08-29 12:05:30,284 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand has 24 states, 24 states have (on average 10.041666666666666) internal successors, (241), 23 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:05:30,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:05:30,692 INFO L93 Difference]: Finished difference Result 264 states and 273 transitions. [2021-08-29 12:05:30,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-29 12:05:30,693 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 10.041666666666666) internal successors, (241), 23 states have internal predecessors, (241), 0 states have call successors, (0), 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 129 [2021-08-29 12:05:30,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:05:30,694 INFO L225 Difference]: With dead ends: 264 [2021-08-29 12:05:30,694 INFO L226 Difference]: Without dead ends: 254 [2021-08-29 12:05:30,694 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 233 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 313.67ms TimeCoverageRelationStatistics Valid=665, Invalid=1141, Unknown=0, NotChecked=0, Total=1806 [2021-08-29 12:05:30,695 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 168.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.93ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 206.13ms IncrementalHoareTripleChecker+Time [2021-08-29 12:05:30,695 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 353 Unknown, 0 Unchecked, 0.93ms Time], IncrementalHoareTripleChecker [1 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 206.13ms Time] [2021-08-29 12:05:30,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-08-29 12:05:30,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-08-29 12:05:30,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 252 states have (on average 1.007936507936508) internal successors, (254), 253 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:05:30,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 254 transitions. [2021-08-29 12:05:30,724 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 254 transitions. Word has length 129 [2021-08-29 12:05:30,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:05:30,725 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 254 transitions. [2021-08-29 12:05:30,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 10.041666666666666) internal successors, (241), 23 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:05:30,725 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 254 transitions. [2021-08-29 12:05:30,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-08-29 12:05:30,726 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:05:30,726 INFO L513 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:05:30,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-29 12:05:30,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-29 12:05:30,931 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-08-29 12:05:30,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:05:30,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1385155574, now seen corresponding path program 4 times [2021-08-29 12:05:30,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:05:30,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847715970] [2021-08-29 12:05:30,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:05:30,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:05:30,939 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:05:30,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269662860] [2021-08-29 12:05:30,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-29 12:05:30,939 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:05:30,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:05:30,958 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 12:05:30,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-29 12:05:31,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-29 12:05:31,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-08-29 12:05:31,236 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 12:05:31,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 12:05:31,504 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-29 12:05:31,505 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 12:05:31,505 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION (10 of 11 remaining) [2021-08-29 12:05:31,506 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (9 of 11 remaining) [2021-08-29 12:05:31,507 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (8 of 11 remaining) [2021-08-29 12:05:31,507 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (7 of 11 remaining) [2021-08-29 12:05:31,507 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (6 of 11 remaining) [2021-08-29 12:05:31,507 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (5 of 11 remaining) [2021-08-29 12:05:31,507 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION (4 of 11 remaining) [2021-08-29 12:05:31,507 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION (3 of 11 remaining) [2021-08-29 12:05:31,508 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION (2 of 11 remaining) [2021-08-29 12:05:31,508 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION (1 of 11 remaining) [2021-08-29 12:05:31,508 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION (0 of 11 remaining) [2021-08-29 12:05:31,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-29 12:05:31,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:05:31,720 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 12:05:31,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 12:05:31 BoogieIcfgContainer [2021-08-29 12:05:31,797 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 12:05:31,797 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 12:05:31,797 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 12:05:31,797 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 12:05:31,798 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 12:03:15" (3/4) ... [2021-08-29 12:05:31,799 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-29 12:05:31,852 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 12:05:31,853 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 12:05:31,853 INFO L158 Benchmark]: Toolchain (without parser) took 137103.42ms. Allocated memory was 48.2MB in the beginning and 146.8MB in the end (delta: 98.6MB). Free memory was 24.3MB in the beginning and 44.5MB in the end (delta: -20.2MB). Peak memory consumption was 77.5MB. Max. memory is 16.1GB. [2021-08-29 12:05:31,853 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 48.2MB. Free memory was 30.7MB in the beginning and 30.6MB in the end (delta: 43.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 12:05:31,854 INFO L158 Benchmark]: CACSL2BoogieTranslator took 253.07ms. Allocated memory was 48.2MB in the beginning and 65.0MB in the end (delta: 16.8MB). Free memory was 24.1MB in the beginning and 49.3MB in the end (delta: -25.2MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. [2021-08-29 12:05:31,854 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.43ms. Allocated memory is still 65.0MB. Free memory was 49.3MB in the beginning and 47.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 12:05:31,854 INFO L158 Benchmark]: Boogie Preprocessor took 32.07ms. Allocated memory is still 65.0MB. Free memory was 47.4MB in the beginning and 46.3MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 12:05:31,854 INFO L158 Benchmark]: RCFGBuilder took 207.15ms. Allocated memory is still 65.0MB. Free memory was 46.1MB in the beginning and 36.4MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-08-29 12:05:31,855 INFO L158 Benchmark]: TraceAbstraction took 136487.15ms. Allocated memory was 65.0MB in the beginning and 146.8MB in the end (delta: 81.8MB). Free memory was 35.9MB in the beginning and 58.2MB in the end (delta: -22.2MB). Peak memory consumption was 60.7MB. Max. memory is 16.1GB. [2021-08-29 12:05:31,855 INFO L158 Benchmark]: Witness Printer took 55.63ms. Allocated memory is still 146.8MB. Free memory was 58.2MB in the beginning and 44.5MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-08-29 12:05:31,856 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 48.2MB. Free memory was 30.7MB in the beginning and 30.6MB in the end (delta: 43.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 253.07ms. Allocated memory was 48.2MB in the beginning and 65.0MB in the end (delta: 16.8MB). Free memory was 24.1MB in the beginning and 49.3MB in the end (delta: -25.2MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.43ms. Allocated memory is still 65.0MB. Free memory was 49.3MB in the beginning and 47.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.07ms. Allocated memory is still 65.0MB. Free memory was 47.4MB in the beginning and 46.3MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 207.15ms. Allocated memory is still 65.0MB. Free memory was 46.1MB in the beginning and 36.4MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 136487.15ms. Allocated memory was 65.0MB in the beginning and 146.8MB in the end (delta: 81.8MB). Free memory was 35.9MB in the beginning and 58.2MB in the end (delta: -22.2MB). Peak memory consumption was 60.7MB. Max. memory is 16.1GB. * Witness Printer took 55.63ms. Allocated memory is still 146.8MB. Free memory was 58.2MB in the beginning and 44.5MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] short a; [L25] long long n, x, y, z; [L26] a = __VERIFIER_nondet_unsigned_short() [L28] n = 0 [L29] x = 0 [L30] y = 1 [L31] z = 6 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [counter=1] [L33] EXPR counter++ VAL [counter=2] [L33] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) VAL [counter=2] [L15] COND FALSE !(!(cond)) VAL [counter=2] [L15] COND FALSE !(!(cond)) VAL [counter=2] [L15] COND FALSE !(!(cond)) VAL [counter=2] [L15] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [counter=2] [L33] EXPR counter++ VAL [counter=3] [L33] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) VAL [counter=3] [L15] COND FALSE !(!(cond)) VAL [counter=3] [L15] COND FALSE !(!(cond)) VAL [counter=3] [L15] COND FALSE !(!(cond)) VAL [counter=3] [L15] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [counter=3] [L33] EXPR counter++ VAL [counter=4] [L33] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) VAL [counter=4] [L15] COND FALSE !(!(cond)) VAL [counter=4] [L15] COND FALSE !(!(cond)) VAL [counter=4] [L15] COND FALSE !(!(cond)) VAL [counter=4] [L15] COND FALSE !(!(cond)) VAL [counter=4] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [counter=4] [L33] EXPR counter++ VAL [counter=5] [L33] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) VAL [counter=5] [L15] COND FALSE !(!(cond)) VAL [counter=5] [L15] COND FALSE !(!(cond)) VAL [counter=5] [L15] COND FALSE !(!(cond)) VAL [counter=5] [L15] COND FALSE !(!(cond)) VAL [counter=5] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [counter=5] [L33] EXPR counter++ VAL [counter=6] [L33] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) VAL [counter=6] [L15] COND FALSE !(!(cond)) VAL [counter=6] [L15] COND FALSE !(!(cond)) VAL [counter=6] [L15] COND FALSE !(!(cond)) VAL [counter=6] [L15] COND FALSE !(!(cond)) VAL [counter=6] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [counter=6] [L33] EXPR counter++ VAL [counter=7] [L33] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) VAL [counter=7] [L15] COND FALSE !(!(cond)) VAL [counter=7] [L15] COND FALSE !(!(cond)) VAL [counter=7] [L15] COND FALSE !(!(cond)) VAL [counter=7] [L15] COND FALSE !(!(cond)) VAL [counter=7] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [counter=7] [L33] EXPR counter++ VAL [counter=8] [L33] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) VAL [counter=8] [L15] COND FALSE !(!(cond)) VAL [counter=8] [L15] COND FALSE !(!(cond)) VAL [counter=8] [L15] COND FALSE !(!(cond)) VAL [counter=8] [L15] COND FALSE !(!(cond)) VAL [counter=8] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [counter=8] [L33] EXPR counter++ VAL [counter=9] [L33] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) VAL [counter=9] [L15] COND FALSE !(!(cond)) VAL [counter=9] [L15] COND FALSE !(!(cond)) VAL [counter=9] [L15] COND FALSE !(!(cond)) VAL [counter=9] [L15] COND FALSE !(!(cond)) VAL [counter=9] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [counter=9] [L33] EXPR counter++ VAL [counter=10] [L33] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) VAL [counter=10] [L15] COND FALSE !(!(cond)) VAL [counter=10] [L15] COND FALSE !(!(cond)) VAL [counter=10] [L15] COND FALSE !(!(cond)) VAL [counter=10] [L15] COND FALSE !(!(cond)) VAL [counter=10] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [counter=10] [L33] EXPR counter++ VAL [counter=11] [L33] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) VAL [counter=11] [L15] COND FALSE !(!(cond)) VAL [counter=11] [L15] COND FALSE !(!(cond)) VAL [counter=11] [L15] COND FALSE !(!(cond)) VAL [counter=11] [L15] COND FALSE !(!(cond)) VAL [counter=11] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [counter=11] [L33] EXPR counter++ VAL [counter=12] [L33] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) VAL [counter=12] [L15] COND FALSE !(!(cond)) VAL [counter=12] [L15] COND FALSE !(!(cond)) VAL [counter=12] [L15] COND FALSE !(!(cond)) VAL [counter=12] [L15] COND FALSE !(!(cond)) VAL [counter=12] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [counter=12] [L33] EXPR counter++ VAL [counter=13] [L33] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) VAL [counter=13] [L15] COND FALSE !(!(cond)) VAL [counter=13] [L15] COND FALSE !(!(cond)) VAL [counter=13] [L15] COND FALSE !(!(cond)) VAL [counter=13] [L15] COND FALSE !(!(cond)) VAL [counter=13] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [counter=13] [L33] EXPR counter++ VAL [counter=14] [L33] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) VAL [counter=14] [L15] COND FALSE !(!(cond)) VAL [counter=14] [L15] COND FALSE !(!(cond)) VAL [counter=14] [L15] COND FALSE !(!(cond)) VAL [counter=14] [L15] COND FALSE !(!(cond)) VAL [counter=14] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [counter=14] [L33] EXPR counter++ VAL [counter=15] [L33] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) VAL [counter=15] [L15] COND FALSE !(!(cond)) VAL [counter=15] [L15] COND FALSE !(!(cond)) VAL [counter=15] [L15] COND FALSE !(!(cond)) VAL [counter=15] [L15] COND FALSE !(!(cond)) VAL [counter=15] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [counter=15] [L33] EXPR counter++ VAL [counter=16] [L33] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) VAL [counter=16] [L15] COND FALSE !(!(cond)) VAL [counter=16] [L15] COND FALSE !(!(cond)) VAL [counter=16] [L15] COND FALSE !(!(cond)) VAL [counter=16] [L15] COND FALSE !(!(cond)) VAL [counter=16] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [counter=16] [L33] EXPR counter++ VAL [counter=17] [L33] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) VAL [counter=17] [L15] COND FALSE !(!(cond)) VAL [counter=17] [L15] COND FALSE !(!(cond)) VAL [counter=17] [L15] COND FALSE !(!(cond)) VAL [counter=17] [L15] COND FALSE !(!(cond)) VAL [counter=17] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [counter=17] [L33] EXPR counter++ VAL [counter=18] [L33] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) VAL [counter=18] [L15] COND FALSE !(!(cond)) VAL [counter=18] [L15] COND FALSE !(!(cond)) VAL [counter=18] [L15] COND FALSE !(!(cond)) VAL [counter=18] [L15] COND FALSE !(!(cond)) VAL [counter=18] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [counter=18] [L33] EXPR counter++ VAL [counter=19] [L33] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) VAL [counter=19] [L15] COND FALSE !(!(cond)) VAL [counter=19] [L15] COND FALSE !(!(cond)) VAL [counter=19] [L15] COND FALSE !(!(cond)) VAL [counter=19] [L15] COND FALSE !(!(cond)) VAL [counter=19] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [counter=19] [L33] EXPR counter++ VAL [counter=20] [L33] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) VAL [counter=20] [L15] COND FALSE !(!(cond)) VAL [counter=20] [L15] COND FALSE !(!(cond)) VAL [counter=20] [L15] COND FALSE !(!(cond)) VAL [counter=20] [L15] COND FALSE !(!(cond)) VAL [counter=20] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [counter=20] [L33] EXPR counter++ VAL [counter=21] [L33] COND FALSE !(counter++<20) [L15] COND FALSE !(!(cond)) VAL [counter=21] [L15] COND TRUE !(cond) VAL [counter=21] [L17] reach_error() VAL [counter=21] - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 52 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 136350.03ms, OverallIterations: 19, TraceHistogramMax: 21, EmptinessCheckTime: 26.58ms, AutomataDifference: 65918.64ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 9.36ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 11 mSolverCounterUnknown, 1057 SdHoareTripleChecker+Valid, 43828.04ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1057 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 43388.89ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 174 IncrementalHoareTripleChecker+Unchecked, 1651 mSDsCounter, 355 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3420 IncrementalHoareTripleChecker+Invalid, 3960 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 355 mSolverCounterUnsat, 0 mSDtfsCounter, 3420 mSolverCounterSat, 18.45ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1249 GetRequests, 998 SyntacticMatches, 11 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 67349.19ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=254occurred in iteration=18, InterpolantAutomatonStates: 193, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 238.86ms AutomataMinimizationTime, 18 MinimizatonAttempts, 274 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 128.53ms SsaConstructionTime, 3232.68ms SatisfiabilityAnalysisTime, 61890.27ms InterpolantComputationTime, 890 NumberOfCodeBlocks, 782 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 1162 ConstructedInterpolants, 48 QuantifiedInterpolants, 14754 SizeOfPredicates, 118 NumberOfNonLiveVariables, 2214 ConjunctsInSsa, 324 ConjunctsInUnsatCore, 30 InterpolantComputations, 7 PerfectInterpolantSequences, 547/2084 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! [2021-08-29 12:05:31,905 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...