./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.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/egcd3-ll_valuebound20.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 b9d3a065e04bbdf9a5a1c5871c8bd8b5f0badb9d .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 12:55:16,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 12:55:16,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 12:55:16,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 12:55:16,712 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 12:55:16,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 12:55:16,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 12:55:16,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 12:55:16,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 12:55:16,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 12:55:16,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 12:55:16,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 12:55:16,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 12:55:16,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 12:55:16,743 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 12:55:16,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 12:55:16,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 12:55:16,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 12:55:16,746 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 12:55:16,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 12:55:16,749 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 12:55:16,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 12:55:16,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 12:55:16,754 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 12:55:16,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 12:55:16,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 12:55:16,791 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 12:55:16,792 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 12:55:16,793 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 12:55:16,793 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 12:55:16,794 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 12:55:16,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 12:55:16,795 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 12:55:16,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 12:55:16,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 12:55:16,798 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 12:55:16,798 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 12:55:16,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 12:55:16,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 12:55:16,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 12:55:16,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 12:55:16,801 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 12:55:16,836 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 12:55:16,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 12:55:16,838 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 12:55:16,838 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 12:55:16,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 12:55:16,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 12:55:16,840 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 12:55:16,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 12:55:16,840 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 12:55:16,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 12:55:16,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 12:55:16,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 12:55:16,841 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 12:55:16,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 12:55:16,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 12:55:16,842 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 12:55:16,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 12:55:16,842 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 12:55:16,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 12:55:16,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 12:55:16,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 12:55:16,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 12:55:16,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 12:55:16,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 12:55:16,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 12:55:16,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 12:55:16,844 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 12:55:16,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 12:55:16,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 12:55:16,844 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 12:55:16,845 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9d3a065e04bbdf9a5a1c5871c8bd8b5f0badb9d [2021-08-29 12:55:17,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 12:55:17,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 12:55:17,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 12:55:17,163 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 12:55:17,165 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 12:55:17,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c [2021-08-29 12:55:17,239 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f90db23f8/cd9c61937f1e472aa8ec7ccfded25ba9/FLAG6efd118e1 [2021-08-29 12:55:17,654 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 12:55:17,655 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c [2021-08-29 12:55:17,661 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f90db23f8/cd9c61937f1e472aa8ec7ccfded25ba9/FLAG6efd118e1 [2021-08-29 12:55:17,675 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f90db23f8/cd9c61937f1e472aa8ec7ccfded25ba9 [2021-08-29 12:55:17,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 12:55:17,687 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 12:55:17,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 12:55:17,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 12:55:17,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 12:55:17,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 12:55:17" (1/1) ... [2021-08-29 12:55:17,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f958b56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:55:17, skipping insertion in model container [2021-08-29 12:55:17,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 12:55:17" (1/1) ... [2021-08-29 12:55:17,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 12:55:17,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 12:55:17,847 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/egcd3-ll_valuebound20.c[490,503] [2021-08-29 12:55:17,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 12:55:17,876 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 12:55:17,914 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/egcd3-ll_valuebound20.c[490,503] [2021-08-29 12:55:17,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 12:55:17,932 INFO L208 MainTranslator]: Completed translation [2021-08-29 12:55:17,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:55:17 WrapperNode [2021-08-29 12:55:17,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 12:55:17,934 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 12:55:17,934 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 12:55:17,934 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 12:55:17,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:55:17" (1/1) ... [2021-08-29 12:55:17,945 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:55:17" (1/1) ... [2021-08-29 12:55:17,961 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 12:55:17,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 12:55:17,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 12:55:17,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 12:55:17,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:55:17" (1/1) ... [2021-08-29 12:55:17,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:55:17" (1/1) ... [2021-08-29 12:55:17,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:55:17" (1/1) ... [2021-08-29 12:55:17,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:55:17" (1/1) ... [2021-08-29 12:55:17,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:55:17" (1/1) ... [2021-08-29 12:55:17,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:55:17" (1/1) ... [2021-08-29 12:55:17,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:55:17" (1/1) ... [2021-08-29 12:55:17,994 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 12:55:17,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 12:55:17,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 12:55:17,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 12:55:17,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:55:17" (1/1) ... [2021-08-29 12:55:18,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 12:55:18,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:55:18,030 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 12:55:18,051 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 12:55:18,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 12:55:18,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 12:55:18,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 12:55:18,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 12:55:18,240 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 12:55:18,241 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2021-08-29 12:55:18,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 12:55:18 BoogieIcfgContainer [2021-08-29 12:55:18,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 12:55:18,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 12:55:18,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 12:55:18,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 12:55:18,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 12:55:17" (1/3) ... [2021-08-29 12:55:18,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4f6217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 12:55:18, skipping insertion in model container [2021-08-29 12:55:18,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:55:17" (2/3) ... [2021-08-29 12:55:18,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4f6217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 12:55:18, skipping insertion in model container [2021-08-29 12:55:18,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 12:55:18" (3/3) ... [2021-08-29 12:55:18,249 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound20.c [2021-08-29 12:55:18,252 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 12:55:18,253 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-08-29 12:55:18,292 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 12:55:18,300 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 12:55:18,301 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-29 12:55:18,321 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 40 states have internal predecessors, (58), 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 12:55:18,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-29 12:55:18,326 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:55:18,326 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:55:18,327 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 12:55:18,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:55:18,331 INFO L82 PathProgramCache]: Analyzing trace with hash -174497841, now seen corresponding path program 1 times [2021-08-29 12:55:18,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:55:18,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694872747] [2021-08-29 12:55:18,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:18,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:55:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:55:18,522 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 12:55:18,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:55:18,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694872747] [2021-08-29 12:55:18,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694872747] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:55:18,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:55:18,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 12:55:18,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138145799] [2021-08-29 12:55:18,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 12:55:18,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:55:18,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 12:55:18,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 12:55:18,556 INFO L87 Difference]: Start difference. First operand has 41 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 40 states have internal predecessors, (58), 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 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 12:55:18,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:55:18,669 INFO L93 Difference]: Finished difference Result 79 states and 112 transitions. [2021-08-29 12:55:18,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 12:55:18,683 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 14 [2021-08-29 12:55:18,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:55:18,689 INFO L225 Difference]: With dead ends: 79 [2021-08-29 12:55:18,690 INFO L226 Difference]: Without dead ends: 37 [2021-08-29 12:55:18,692 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 12:55:18,695 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.42ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 96.42ms IncrementalHoareTripleChecker+Time [2021-08-29 12:55:18,697 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 43 Unknown, 0 Unchecked, 0.42ms Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 96.42ms Time] [2021-08-29 12:55:18,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-29 12:55:18,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-08-29 12:55:18,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.21875) internal successors, (39), 36 states have internal predecessors, (39), 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 12:55:18,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-08-29 12:55:18,731 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 14 [2021-08-29 12:55:18,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:55:18,732 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-08-29 12:55:18,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 12:55:18,732 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-08-29 12:55:18,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-29 12:55:18,733 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:55:18,733 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:55:18,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 12:55:18,734 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 12:55:18,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:55:18,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1454170515, now seen corresponding path program 1 times [2021-08-29 12:55:18,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:55:18,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150988930] [2021-08-29 12:55:18,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:18,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:55:18,771 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:55:18,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972741050] [2021-08-29 12:55:18,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:18,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:55:18,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:55:18,814 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 12:55:18,815 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 12:55:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:55:18,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-29 12:55:18,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:55:19,057 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 12:55:19,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:55:19,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:55:19,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150988930] [2021-08-29 12:55:19,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:55:19,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972741050] [2021-08-29 12:55:19,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972741050] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:55:19,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:55:19,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 12:55:19,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25278704] [2021-08-29 12:55:19,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 12:55:19,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:55:19,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 12:55:19,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 12:55:19,062 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 12:55:19,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:55:19,221 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2021-08-29 12:55:19,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 12:55:19,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 15 [2021-08-29 12:55:19,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:55:19,223 INFO L225 Difference]: With dead ends: 64 [2021-08-29 12:55:19,223 INFO L226 Difference]: Without dead ends: 60 [2021-08-29 12:55:19,224 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.24ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-29 12:55:19,225 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 132 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 99.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.31ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 115.16ms IncrementalHoareTripleChecker+Time [2021-08-29 12:55:19,225 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 0 Invalid, 94 Unknown, 0 Unchecked, 2.31ms Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 115.16ms Time] [2021-08-29 12:55:19,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-29 12:55:19,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2021-08-29 12:55:19,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 38 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 12:55:19,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-08-29 12:55:19,232 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 15 [2021-08-29 12:55:19,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:55:19,232 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-08-29 12:55:19,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 12:55:19,233 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-08-29 12:55:19,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-29 12:55:19,248 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:55:19,248 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:55:19,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 12:55:19,449 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 12:55:19,449 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 12:55:19,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:55:19,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1580206288, now seen corresponding path program 1 times [2021-08-29 12:55:19,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:55:19,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827932602] [2021-08-29 12:55:19,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:19,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:55:19,463 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:55:19,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678095595] [2021-08-29 12:55:19,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:19,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:55:19,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:55:19,467 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 12:55:19,469 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 12:55:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:55:19,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-29 12:55:19,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:55:19,806 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 12:55:19,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:55:19,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:55:19,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827932602] [2021-08-29 12:55:19,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:55:19,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678095595] [2021-08-29 12:55:19,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678095595] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:55:19,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:55:19,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-29 12:55:19,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234879640] [2021-08-29 12:55:19,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-29 12:55:19,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:55:19,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-29 12:55:19,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-29 12:55:19,813 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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 12:55:20,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:55:20,062 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-08-29 12:55:20,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 12:55:20,063 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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 17 [2021-08-29 12:55:20,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:55:20,064 INFO L225 Difference]: With dead ends: 60 [2021-08-29 12:55:20,064 INFO L226 Difference]: Without dead ends: 58 [2021-08-29 12:55:20,064 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 169.17ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-29 12:55:20,065 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 175 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.22ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 109.14ms IncrementalHoareTripleChecker+Time [2021-08-29 12:55:20,066 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 0 Invalid, 137 Unknown, 0 Unchecked, 7.22ms Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 109.14ms Time] [2021-08-29 12:55:20,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-29 12:55:20,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2021-08-29 12:55:20,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 50 states have internal predecessors, (58), 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 12:55:20,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2021-08-29 12:55:20,072 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 17 [2021-08-29 12:55:20,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:55:20,073 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2021-08-29 12:55:20,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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 12:55:20,073 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2021-08-29 12:55:20,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-29 12:55:20,074 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:55:20,074 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:55:20,099 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 12:55:20,296 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 12:55:20,297 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 12:55:20,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:55:20,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1840022701, now seen corresponding path program 1 times [2021-08-29 12:55:20,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:55:20,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059464817] [2021-08-29 12:55:20,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:20,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:55:20,311 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:55:20,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326669740] [2021-08-29 12:55:20,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:20,319 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:55:20,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:55:20,323 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 12:55:20,325 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 12:55:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:55:20,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-29 12:55:20,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:55:20,674 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 12:55:20,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:55:20,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:55:20,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059464817] [2021-08-29 12:55:20,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:55:20,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326669740] [2021-08-29 12:55:20,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326669740] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:55:20,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:55:20,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-29 12:55:20,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560915140] [2021-08-29 12:55:20,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-29 12:55:20,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:55:20,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-29 12:55:20,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-29 12:55:20,676 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:55:21,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:55:21,123 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2021-08-29 12:55:21,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-29 12:55:21,124 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-29 12:55:21,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:55:21,125 INFO L225 Difference]: With dead ends: 75 [2021-08-29 12:55:21,125 INFO L226 Difference]: Without dead ends: 73 [2021-08-29 12:55:21,125 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 355.86ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-08-29 12:55:21,127 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 210 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 121.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.61ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 155.62ms IncrementalHoareTripleChecker+Time [2021-08-29 12:55:21,127 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 0 Invalid, 243 Unknown, 0 Unchecked, 1.61ms Time], IncrementalHoareTripleChecker [17 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 155.62ms Time] [2021-08-29 12:55:21,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-29 12:55:21,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 51. [2021-08-29 12:55:21,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 50 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 12:55:21,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-08-29 12:55:21,133 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 19 [2021-08-29 12:55:21,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:55:21,134 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-08-29 12:55:21,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:55:21,134 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-08-29 12:55:21,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-29 12:55:21,135 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:55:21,135 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:55:21,160 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 12:55:21,348 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 12:55:21,349 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 12:55:21,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:55:21,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1412177226, now seen corresponding path program 1 times [2021-08-29 12:55:21,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:55:21,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211079430] [2021-08-29 12:55:21,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:21,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:55:21,363 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:55:21,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825566106] [2021-08-29 12:55:21,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:21,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:55:21,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:55:21,365 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 12:55:21,366 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 12:55:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:55:21,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-29 12:55:21,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:55:21,471 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 12:55:21,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:55:21,526 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 12:55:21,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:55:21,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211079430] [2021-08-29 12:55:21,527 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:55:21,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825566106] [2021-08-29 12:55:21,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825566106] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:55:21,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:55:21,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-29 12:55:21,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179399929] [2021-08-29 12:55:21,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-29 12:55:21,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:55:21,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-29 12:55:21,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-29 12:55:21,529 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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 12:55:21,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:55:21,744 INFO L93 Difference]: Finished difference Result 140 states and 157 transitions. [2021-08-29 12:55:21,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 12:55:21,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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 12:55:21,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:55:21,746 INFO L225 Difference]: With dead ends: 140 [2021-08-29 12:55:21,746 INFO L226 Difference]: Without dead ends: 136 [2021-08-29 12:55:21,746 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 64.70ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-29 12:55:21,747 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 173 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 124.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.30ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 161.67ms IncrementalHoareTripleChecker+Time [2021-08-29 12:55:21,747 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 0 Invalid, 283 Unknown, 0 Unchecked, 1.30ms Time], IncrementalHoareTripleChecker [11 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 161.67ms Time] [2021-08-29 12:55:21,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-08-29 12:55:21,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 75. [2021-08-29 12:55:21,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.3) internal successors, (91), 74 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:55:21,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2021-08-29 12:55:21,756 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 20 [2021-08-29 12:55:21,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:55:21,761 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2021-08-29 12:55:21,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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 12:55:21,761 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2021-08-29 12:55:21,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-29 12:55:21,762 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:55:21,762 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:55:21,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-29 12:55:21,976 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 12:55:21,977 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 12:55:21,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:55:21,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1264867958, now seen corresponding path program 1 times [2021-08-29 12:55:21,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:55:21,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862373503] [2021-08-29 12:55:21,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:21,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:55:21,987 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:55:21,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145575114] [2021-08-29 12:55:21,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:21,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:55:21,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:55:21,988 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 12:55:21,991 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 12:55:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:55:22,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-29 12:55:22,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:55:22,171 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 12:55:22,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:55:22,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:55:22,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862373503] [2021-08-29 12:55:22,172 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:55:22,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145575114] [2021-08-29 12:55:22,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145575114] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:55:22,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:55:22,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-29 12:55:22,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468210331] [2021-08-29 12:55:22,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-29 12:55:22,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:55:22,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-29 12:55:22,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-29 12:55:22,174 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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 12:55:22,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:55:22,349 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2021-08-29 12:55:22,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 12:55:22,349 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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 12:55:22,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:55:22,350 INFO L225 Difference]: With dead ends: 95 [2021-08-29 12:55:22,350 INFO L226 Difference]: Without dead ends: 93 [2021-08-29 12:55:22,350 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 89.38ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-29 12:55:22,351 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 135 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.93ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 96.63ms IncrementalHoareTripleChecker+Time [2021-08-29 12:55:22,351 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 0 Invalid, 166 Unknown, 0 Unchecked, 0.93ms Time], IncrementalHoareTripleChecker [9 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 96.63ms Time] [2021-08-29 12:55:22,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-29 12:55:22,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2021-08-29 12:55:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.2911392405063291) internal successors, (102), 83 states have internal predecessors, (102), 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 12:55:22,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2021-08-29 12:55:22,361 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 21 [2021-08-29 12:55:22,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:55:22,361 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2021-08-29 12:55:22,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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 12:55:22,361 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2021-08-29 12:55:22,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-29 12:55:22,362 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:55:22,362 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:55:22,390 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 12:55:22,580 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 12:55:22,581 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 12:55:22,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:55:22,581 INFO L82 PathProgramCache]: Analyzing trace with hash 94063923, now seen corresponding path program 1 times [2021-08-29 12:55:22,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:55:22,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104585285] [2021-08-29 12:55:22,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:22,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:55:22,589 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:55:22,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164893844] [2021-08-29 12:55:22,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:22,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:55:22,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:55:22,591 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 12:55:22,597 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 12:55:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:55:22,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-29 12:55:22,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:55:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:55:23,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:55:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:55:23,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:55:23,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104585285] [2021-08-29 12:55:23,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:55:23,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164893844] [2021-08-29 12:55:23,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164893844] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:55:23,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:55:23,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2021-08-29 12:55:23,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17107650] [2021-08-29 12:55:23,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-29 12:55:23,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:55:23,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-29 12:55:23,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-08-29 12:55:23,159 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 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 12:55:23,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:55:23,712 INFO L93 Difference]: Finished difference Result 144 states and 165 transitions. [2021-08-29 12:55:23,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-29 12:55:23,712 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 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 12:55:23,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:55:23,713 INFO L225 Difference]: With dead ends: 144 [2021-08-29 12:55:23,713 INFO L226 Difference]: Without dead ends: 142 [2021-08-29 12:55:23,714 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 410.21ms TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2021-08-29 12:55:23,714 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 263 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 227.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.14ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 273.58ms IncrementalHoareTripleChecker+Time [2021-08-29 12:55:23,715 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 0 Invalid, 479 Unknown, 0 Unchecked, 2.14ms Time], IncrementalHoareTripleChecker [44 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 273.58ms Time] [2021-08-29 12:55:23,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-29 12:55:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 116. [2021-08-29 12:55:23,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.3153153153153154) internal successors, (146), 115 states have internal predecessors, (146), 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 12:55:23,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 146 transitions. [2021-08-29 12:55:23,728 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 146 transitions. Word has length 22 [2021-08-29 12:55:23,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:55:23,729 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 146 transitions. [2021-08-29 12:55:23,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 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 12:55:23,729 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 146 transitions. [2021-08-29 12:55:23,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-29 12:55:23,730 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:55:23,730 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:55:23,756 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 12:55:23,944 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 12:55:23,944 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 12:55:23,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:55:23,945 INFO L82 PathProgramCache]: Analyzing trace with hash 62520889, now seen corresponding path program 1 times [2021-08-29 12:55:23,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:55:23,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686602032] [2021-08-29 12:55:23,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:23,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:55:23,958 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:55:23,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1163482893] [2021-08-29 12:55:23,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:23,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:55:23,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:55:23,964 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 12:55:23,965 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 12:55:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:55:24,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-29 12:55:24,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:55:24,071 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 12:55:24,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:55:24,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:55:24,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686602032] [2021-08-29 12:55:24,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:55:24,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163482893] [2021-08-29 12:55:24,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163482893] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:55:24,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:55:24,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 12:55:24,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473354726] [2021-08-29 12:55:24,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 12:55:24,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:55:24,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 12:55:24,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 12:55:24,074 INFO L87 Difference]: Start difference. First operand 116 states and 146 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:55:24,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:55:24,169 INFO L93 Difference]: Finished difference Result 226 states and 287 transitions. [2021-08-29 12:55:24,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 12:55:24,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-29 12:55:24,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:55:24,173 INFO L225 Difference]: With dead ends: 226 [2021-08-29 12:55:24,173 INFO L226 Difference]: Without dead ends: 224 [2021-08-29 12:55:24,173 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.05ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 12:55:24,174 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.41ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.25ms IncrementalHoareTripleChecker+Time [2021-08-29 12:55:24,175 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 134 Unknown, 0 Unchecked, 0.41ms Time], IncrementalHoareTripleChecker [3 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 67.25ms Time] [2021-08-29 12:55:24,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-08-29 12:55:24,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 164. [2021-08-29 12:55:24,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.2893081761006289) internal successors, (205), 163 states have internal predecessors, (205), 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 12:55:24,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 205 transitions. [2021-08-29 12:55:24,204 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 205 transitions. Word has length 23 [2021-08-29 12:55:24,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:55:24,204 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 205 transitions. [2021-08-29 12:55:24,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:55:24,204 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 205 transitions. [2021-08-29 12:55:24,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-29 12:55:24,208 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:55:24,208 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:55:24,232 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 12:55:24,424 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 12:55:24,424 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 12:55:24,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:55:24,424 INFO L82 PathProgramCache]: Analyzing trace with hash 201274102, now seen corresponding path program 1 times [2021-08-29 12:55:24,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:55:24,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609926870] [2021-08-29 12:55:24,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:24,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:55:24,437 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:55:24,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209911416] [2021-08-29 12:55:24,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:24,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:55:24,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:55:24,439 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 12:55:24,461 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 12:55:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:55:24,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-29 12:55:24,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:55:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:55:24,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:55:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:55:24,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:55:24,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609926870] [2021-08-29 12:55:24,736 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:55:24,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209911416] [2021-08-29 12:55:24,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209911416] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:55:24,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:55:24,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-29 12:55:24,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424648510] [2021-08-29 12:55:24,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-29 12:55:24,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:55:24,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-29 12:55:24,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-29 12:55:24,739 INFO L87 Difference]: Start difference. First operand 164 states and 205 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 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 12:55:25,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:55:25,590 INFO L93 Difference]: Finished difference Result 440 states and 548 transitions. [2021-08-29 12:55:25,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-29 12:55:25,591 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 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 24 [2021-08-29 12:55:25,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:55:25,593 INFO L225 Difference]: With dead ends: 440 [2021-08-29 12:55:25,593 INFO L226 Difference]: Without dead ends: 434 [2021-08-29 12:55:25,594 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 244.72ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-08-29 12:55:25,596 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 272 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 534.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.41ms SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 585.89ms IncrementalHoareTripleChecker+Time [2021-08-29 12:55:25,596 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 0 Invalid, 501 Unknown, 0 Unchecked, 2.41ms Time], IncrementalHoareTripleChecker [75 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 585.89ms Time] [2021-08-29 12:55:25,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-08-29 12:55:25,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 261. [2021-08-29 12:55:25,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.28515625) internal successors, (329), 260 states have internal predecessors, (329), 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 12:55:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 329 transitions. [2021-08-29 12:55:25,632 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 329 transitions. Word has length 24 [2021-08-29 12:55:25,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:55:25,632 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 329 transitions. [2021-08-29 12:55:25,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 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 12:55:25,632 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 329 transitions. [2021-08-29 12:55:25,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-29 12:55:25,633 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:55:25,633 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:55:25,660 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 12:55:25,852 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 12:55:25,853 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 12:55:25,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:55:25,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1112899551, now seen corresponding path program 1 times [2021-08-29 12:55:25,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:55:25,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833412584] [2021-08-29 12:55:25,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:25,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:55:25,864 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:55:25,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842751893] [2021-08-29 12:55:25,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:25,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:55:25,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:55:25,865 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 12:55:25,868 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 12:55:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:55:25,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-29 12:55:25,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:55:26,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:55:26,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:55:26,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:55:26,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:55:26,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833412584] [2021-08-29 12:55:26,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:55:26,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842751893] [2021-08-29 12:55:26,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842751893] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:55:26,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:55:26,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-29 12:55:26,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409550998] [2021-08-29 12:55:26,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-29 12:55:26,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:55:26,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-29 12:55:26,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-29 12:55:26,762 INFO L87 Difference]: Start difference. First operand 261 states and 329 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 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 12:55:30,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:55:30,853 INFO L93 Difference]: Finished difference Result 750 states and 920 transitions. [2021-08-29 12:55:30,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-29 12:55:30,853 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 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 32 [2021-08-29 12:55:30,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:55:30,856 INFO L225 Difference]: With dead ends: 750 [2021-08-29 12:55:30,856 INFO L226 Difference]: Without dead ends: 737 [2021-08-29 12:55:30,857 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1351.71ms TimeCoverageRelationStatistics Valid=568, Invalid=2188, Unknown=0, NotChecked=0, Total=2756 [2021-08-29 12:55:30,858 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 442 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2644.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.20ms SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2814.30ms IncrementalHoareTripleChecker+Time [2021-08-29 12:55:30,858 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 0 Invalid, 1085 Unknown, 0 Unchecked, 5.20ms Time], IncrementalHoareTripleChecker [144 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 2814.30ms Time] [2021-08-29 12:55:30,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-08-29 12:55:30,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 405. [2021-08-29 12:55:30,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 400 states have (on average 1.27) internal successors, (508), 404 states have internal predecessors, (508), 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 12:55:30,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 508 transitions. [2021-08-29 12:55:30,915 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 508 transitions. Word has length 32 [2021-08-29 12:55:30,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:55:30,915 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 508 transitions. [2021-08-29 12:55:30,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 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 12:55:30,915 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 508 transitions. [2021-08-29 12:55:30,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-29 12:55:30,916 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:55:30,916 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:55:30,941 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 12:55:31,132 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 12:55:31,133 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 12:55:31,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:55:31,133 INFO L82 PathProgramCache]: Analyzing trace with hash -986732336, now seen corresponding path program 1 times [2021-08-29 12:55:31,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:55:31,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267045505] [2021-08-29 12:55:31,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:31,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:55:31,140 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:55:31,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227549011] [2021-08-29 12:55:31,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:31,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:55:31,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:55:31,142 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 12:55:31,144 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 12:55:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:55:31,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-29 12:55:31,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:55:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:55:31,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:55:31,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:55:31,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:55:31,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267045505] [2021-08-29 12:55:31,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:55:31,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227549011] [2021-08-29 12:55:31,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227549011] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:55:31,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:55:31,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 13 [2021-08-29 12:55:31,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196047351] [2021-08-29 12:55:31,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-29 12:55:31,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:55:31,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-29 12:55:31,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-29 12:55:31,640 INFO L87 Difference]: Start difference. First operand 405 states and 508 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 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 12:55:32,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:55:32,061 INFO L93 Difference]: Finished difference Result 450 states and 562 transitions. [2021-08-29 12:55:32,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-29 12:55:32,061 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 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 32 [2021-08-29 12:55:32,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:55:32,063 INFO L225 Difference]: With dead ends: 450 [2021-08-29 12:55:32,063 INFO L226 Difference]: Without dead ends: 448 [2021-08-29 12:55:32,064 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 267.92ms TimeCoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2021-08-29 12:55:32,064 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 152 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 172.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.52ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 215.31ms IncrementalHoareTripleChecker+Time [2021-08-29 12:55:32,065 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 0 Invalid, 446 Unknown, 0 Unchecked, 1.52ms Time], IncrementalHoareTripleChecker [24 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 215.31ms Time] [2021-08-29 12:55:32,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-08-29 12:55:32,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 315. [2021-08-29 12:55:32,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 311 states have (on average 1.2540192926045015) internal successors, (390), 314 states have internal predecessors, (390), 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 12:55:32,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 390 transitions. [2021-08-29 12:55:32,110 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 390 transitions. Word has length 32 [2021-08-29 12:55:32,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:55:32,110 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 390 transitions. [2021-08-29 12:55:32,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 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 12:55:32,110 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 390 transitions. [2021-08-29 12:55:32,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-29 12:55:32,111 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:55:32,111 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:55:32,133 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 12:55:32,324 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 12:55:32,325 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 12:55:32,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:55:32,328 INFO L82 PathProgramCache]: Analyzing trace with hash 913672398, now seen corresponding path program 1 times [2021-08-29 12:55:32,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:55:32,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739568046] [2021-08-29 12:55:32,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:32,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:55:32,356 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:55:32,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632108070] [2021-08-29 12:55:32,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:32,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:55:32,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:55:32,360 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 12:55:32,361 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 12:55:32,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:55:32,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-29 12:55:32,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:55:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-29 12:55:32,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:55:32,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:55:32,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739568046] [2021-08-29 12:55:32,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:55:32,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632108070] [2021-08-29 12:55:32,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632108070] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:55:32,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:55:32,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 12:55:32,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216501738] [2021-08-29 12:55:32,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 12:55:32,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:55:32,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 12:55:32,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-29 12:55:32,485 INFO L87 Difference]: Start difference. First operand 315 states and 390 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:55:32,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:55:32,628 INFO L93 Difference]: Finished difference Result 659 states and 825 transitions. [2021-08-29 12:55:32,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 12:55:32,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-29 12:55:32,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:55:32,631 INFO L225 Difference]: With dead ends: 659 [2021-08-29 12:55:32,631 INFO L226 Difference]: Without dead ends: 444 [2021-08-29 12:55:32,632 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.09ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-29 12:55:32,633 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.42ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.80ms IncrementalHoareTripleChecker+Time [2021-08-29 12:55:32,633 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 134 Unknown, 0 Unchecked, 0.42ms Time], IncrementalHoareTripleChecker [2 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 72.80ms Time] [2021-08-29 12:55:32,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-08-29 12:55:32,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 420. [2021-08-29 12:55:32,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 416 states have (on average 1.2403846153846154) internal successors, (516), 419 states have internal predecessors, (516), 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 12:55:32,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 516 transitions. [2021-08-29 12:55:32,694 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 516 transitions. Word has length 38 [2021-08-29 12:55:32,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:55:32,694 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 516 transitions. [2021-08-29 12:55:32,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:55:32,695 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 516 transitions. [2021-08-29 12:55:32,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-29 12:55:32,695 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:55:32,695 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:55:32,719 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 12:55:32,913 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 12:55:32,913 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 12:55:32,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:55:32,913 INFO L82 PathProgramCache]: Analyzing trace with hash 820532868, now seen corresponding path program 2 times [2021-08-29 12:55:32,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:55:32,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698891765] [2021-08-29 12:55:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:32,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:55:32,937 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:55:32,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140487444] [2021-08-29 12:55:32,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 12:55:32,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:55:32,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:55:32,939 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 12:55:32,940 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 12:55:32,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-29 12:55:32,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 12:55:32,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-29 12:55:32,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:55:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-29 12:55:33,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:55:33,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:55:33,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698891765] [2021-08-29 12:55:33,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:55:33,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140487444] [2021-08-29 12:55:33,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140487444] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:55:33,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:55:33,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 12:55:33,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236924320] [2021-08-29 12:55:33,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 12:55:33,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:55:33,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 12:55:33,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 12:55:33,065 INFO L87 Difference]: Start difference. First operand 420 states and 516 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 12:55:33,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:55:33,206 INFO L93 Difference]: Finished difference Result 562 states and 699 transitions. [2021-08-29 12:55:33,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 12:55:33,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-29 12:55:33,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:55:33,209 INFO L225 Difference]: With dead ends: 562 [2021-08-29 12:55:33,209 INFO L226 Difference]: Without dead ends: 560 [2021-08-29 12:55:33,209 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.40ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 12:55:33,210 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 12 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.37ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.83ms IncrementalHoareTripleChecker+Time [2021-08-29 12:55:33,211 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 0 Invalid, 110 Unknown, 0 Unchecked, 0.37ms Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 62.83ms Time] [2021-08-29 12:55:33,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-08-29 12:55:33,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 541. [2021-08-29 12:55:33,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 537 states have (on average 1.2364990689013036) internal successors, (664), 540 states have internal predecessors, (664), 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 12:55:33,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 664 transitions. [2021-08-29 12:55:33,290 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 664 transitions. Word has length 38 [2021-08-29 12:55:33,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:55:33,291 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 664 transitions. [2021-08-29 12:55:33,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 12:55:33,291 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 664 transitions. [2021-08-29 12:55:33,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-29 12:55:33,292 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:55:33,292 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:55:33,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-29 12:55:33,497 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 12:55:33,497 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 12:55:33,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:55:33,498 INFO L82 PathProgramCache]: Analyzing trace with hash -795421979, now seen corresponding path program 1 times [2021-08-29 12:55:33,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:55:33,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757218890] [2021-08-29 12:55:33,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:33,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:55:33,504 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:55:33,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781095339] [2021-08-29 12:55:33,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:33,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:55:33,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:55:33,505 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 12:55:33,512 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 12:55:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:55:33,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-29 12:55:33,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:55:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:55:33,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:55:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:55:33,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:55:33,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757218890] [2021-08-29 12:55:33,772 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:55:33,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781095339] [2021-08-29 12:55:33,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781095339] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:55:33,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:55:33,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-29 12:55:33,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012675944] [2021-08-29 12:55:33,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-29 12:55:33,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:55:33,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-29 12:55:33,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-29 12:55:33,774 INFO L87 Difference]: Start difference. First operand 541 states and 664 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 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 12:55:34,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:55:34,152 INFO L93 Difference]: Finished difference Result 702 states and 848 transitions. [2021-08-29 12:55:34,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-29 12:55:34,152 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 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) Word has length 39 [2021-08-29 12:55:34,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:55:34,154 INFO L225 Difference]: With dead ends: 702 [2021-08-29 12:55:34,154 INFO L226 Difference]: Without dead ends: 342 [2021-08-29 12:55:34,157 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 135.78ms TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2021-08-29 12:55:34,158 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 220 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 188.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.80ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 228.24ms IncrementalHoareTripleChecker+Time [2021-08-29 12:55:34,158 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 0 Invalid, 515 Unknown, 0 Unchecked, 1.80ms Time], IncrementalHoareTripleChecker [21 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 228.24ms Time] [2021-08-29 12:55:34,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-08-29 12:55:34,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 315. [2021-08-29 12:55:34,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 311 states have (on average 1.189710610932476) internal successors, (370), 314 states have internal predecessors, (370), 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 12:55:34,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 370 transitions. [2021-08-29 12:55:34,211 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 370 transitions. Word has length 39 [2021-08-29 12:55:34,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:55:34,212 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 370 transitions. [2021-08-29 12:55:34,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 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 12:55:34,212 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 370 transitions. [2021-08-29 12:55:34,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-29 12:55:34,213 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:55:34,214 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:55:34,239 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 12:55:34,428 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 12:55:34,429 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 12:55:34,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:55:34,429 INFO L82 PathProgramCache]: Analyzing trace with hash 274679198, now seen corresponding path program 1 times [2021-08-29 12:55:34,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:55:34,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608707449] [2021-08-29 12:55:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:34,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:55:34,434 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:55:34,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749455014] [2021-08-29 12:55:34,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:34,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:55:34,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:55:34,435 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 12:55:34,439 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 12:55:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:55:34,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 55 conjunts are in the unsatisfiable core [2021-08-29 12:55:34,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:55:35,204 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:55:35,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:55:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:55:36,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:55:36,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608707449] [2021-08-29 12:55:36,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:55:36,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749455014] [2021-08-29 12:55:36,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749455014] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:55:36,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:55:36,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-29 12:55:36,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203994303] [2021-08-29 12:55:36,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-29 12:55:36,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:55:36,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-29 12:55:36,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-29 12:55:36,270 INFO L87 Difference]: Start difference. First operand 315 states and 370 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 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 12:55:44,189 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 12:55:45,233 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:55:55,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:55:55,312 INFO L93 Difference]: Finished difference Result 457 states and 534 transitions. [2021-08-29 12:55:55,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-29 12:55:55,313 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 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 41 [2021-08-29 12:55:55,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:55:55,314 INFO L225 Difference]: With dead ends: 457 [2021-08-29 12:55:55,314 INFO L226 Difference]: Without dead ends: 453 [2021-08-29 12:55:55,315 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 10946.68ms TimeCoverageRelationStatistics Valid=619, Invalid=2137, Unknown=0, NotChecked=0, Total=2756 [2021-08-29 12:55:55,316 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 448 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8763.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.63ms SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8884.90ms IncrementalHoareTripleChecker+Time [2021-08-29 12:55:55,316 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 0 Invalid, 1304 Unknown, 0 Unchecked, 5.63ms Time], IncrementalHoareTripleChecker [243 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 8884.90ms Time] [2021-08-29 12:55:55,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-08-29 12:55:55,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 361. [2021-08-29 12:55:55,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 357 states have (on average 1.173669467787115) internal successors, (419), 360 states have internal predecessors, (419), 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 12:55:55,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 419 transitions. [2021-08-29 12:55:55,381 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 419 transitions. Word has length 41 [2021-08-29 12:55:55,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:55:55,381 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 419 transitions. [2021-08-29 12:55:55,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 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 12:55:55,382 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 419 transitions. [2021-08-29 12:55:55,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-29 12:55:55,382 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:55:55,382 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:55:55,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-29 12:55:55,582 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 12:55:55,583 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 12:55:55,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:55:55,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1976752845, now seen corresponding path program 1 times [2021-08-29 12:55:55,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:55:55,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804720480] [2021-08-29 12:55:55,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:55,584 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:55:55,590 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:55:55,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [944737609] [2021-08-29 12:55:55,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:55:55,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:55:55,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:55:55,594 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 12:55:55,599 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 12:55:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:55:55,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 88 conjunts are in the unsatisfiable core [2021-08-29 12:55:55,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:55:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:55:56,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:55:58,899 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 12:55:58,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:55:58,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804720480] [2021-08-29 12:55:58,899 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:55:58,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944737609] [2021-08-29 12:55:58,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944737609] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:55:58,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:55:58,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-08-29 12:55:58,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422099614] [2021-08-29 12:55:58,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-29 12:55:58,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:55:58,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-29 12:55:58,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-08-29 12:55:58,901 INFO L87 Difference]: Start difference. First operand 361 states and 419 transitions. Second operand has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 31 states have internal predecessors, (80), 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 12:56:10,872 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 12:56:15,042 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:56:23,620 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:56:24,860 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:56:37,303 WARN L515 Checker$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 12:56:47,644 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:56:51,948 WARN L515 Checker$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 12:57:00,797 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:57:05,288 WARN L515 Checker$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 12:57:12,107 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 12:57:16,277 WARN L515 Checker$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 12:57:16,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:57:16,698 INFO L93 Difference]: Finished difference Result 623 states and 716 transitions. [2021-08-29 12:57:16,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-08-29 12:57:16,699 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 31 states have internal predecessors, (80), 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 46 [2021-08-29 12:57:16,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:57:16,700 INFO L225 Difference]: With dead ends: 623 [2021-08-29 12:57:16,700 INFO L226 Difference]: Without dead ends: 617 [2021-08-29 12:57:16,704 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7804 ImplicationChecksByTransitivity, 43435.88ms TimeCoverageRelationStatistics Valid=3182, Invalid=17410, Unknown=0, NotChecked=0, Total=20592 [2021-08-29 12:57:16,704 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 641 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 313 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35755.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.39ms SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35950.66ms IncrementalHoareTripleChecker+Time [2021-08-29 12:57:16,704 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 0 Invalid, 2051 Unknown, 0 Unchecked, 19.39ms Time], IncrementalHoareTripleChecker [313 Valid, 1730 Invalid, 8 Unknown, 0 Unchecked, 35950.66ms Time] [2021-08-29 12:57:16,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-08-29 12:57:16,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 501. [2021-08-29 12:57:16,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 497 states have (on average 1.193158953722334) internal successors, (593), 500 states have internal predecessors, (593), 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 12:57:16,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 593 transitions. [2021-08-29 12:57:16,811 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 593 transitions. Word has length 46 [2021-08-29 12:57:16,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:57:16,812 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 593 transitions. [2021-08-29 12:57:16,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 31 states have internal predecessors, (80), 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 12:57:16,812 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 593 transitions. [2021-08-29 12:57:16,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-29 12:57:16,813 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:57:16,813 INFO L513 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:57:16,837 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 12:57:17,028 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 12:57:17,029 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 12:57:17,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:57:17,029 INFO L82 PathProgramCache]: Analyzing trace with hash 272025232, now seen corresponding path program 2 times [2021-08-29 12:57:17,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:57:17,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891781030] [2021-08-29 12:57:17,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:57:17,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:57:17,036 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:57:17,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747999988] [2021-08-29 12:57:17,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 12:57:17,036 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:57:17,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:57:17,041 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 12:57:17,043 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 12:57:17,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 12:57:17,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 12:57:17,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-29 12:57:17,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:57:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-29 12:57:17,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:57:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-29 12:57:17,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:57:17,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891781030] [2021-08-29 12:57:17,304 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:57:17,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747999988] [2021-08-29 12:57:17,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747999988] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:57:17,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:57:17,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-29 12:57:17,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292140136] [2021-08-29 12:57:17,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-29 12:57:17,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:57:17,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-29 12:57:17,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-29 12:57:17,306 INFO L87 Difference]: Start difference. First operand 501 states and 593 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:17,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:57:17,658 INFO L93 Difference]: Finished difference Result 503 states and 594 transitions. [2021-08-29 12:57:17,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 12:57:17,659 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-29 12:57:17,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:57:17,660 INFO L225 Difference]: With dead ends: 503 [2021-08-29 12:57:17,660 INFO L226 Difference]: Without dead ends: 499 [2021-08-29 12:57:17,661 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 84.57ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-29 12:57:17,661 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 51 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 188.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.25ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 206.56ms IncrementalHoareTripleChecker+Time [2021-08-29 12:57:17,662 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 0 Invalid, 143 Unknown, 0 Unchecked, 0.25ms Time], IncrementalHoareTripleChecker [13 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 206.56ms Time] [2021-08-29 12:57:17,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-08-29 12:57:17,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 360. [2021-08-29 12:57:17,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 357 states have (on average 1.145658263305322) internal successors, (409), 359 states have internal predecessors, (409), 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 12:57:17,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 409 transitions. [2021-08-29 12:57:17,759 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 409 transitions. Word has length 51 [2021-08-29 12:57:17,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:57:17,759 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 409 transitions. [2021-08-29 12:57:17,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:17,760 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 409 transitions. [2021-08-29 12:57:17,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-29 12:57:17,760 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:57:17,760 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:57:17,776 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 12:57:17,961 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 12:57:17,961 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 12:57:17,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:57:17,962 INFO L82 PathProgramCache]: Analyzing trace with hash 448462549, now seen corresponding path program 2 times [2021-08-29 12:57:17,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:57:17,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786791693] [2021-08-29 12:57:17,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:57:17,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:57:17,969 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:57:17,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1124933750] [2021-08-29 12:57:17,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 12:57:17,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:57:17,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:57:17,970 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 12:57:17,973 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 12:57:18,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 12:57:18,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 12:57:18,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 77 conjunts are in the unsatisfiable core [2021-08-29 12:57:18,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:57:19,120 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 12:57:19,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:57:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-29 12:57:20,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:57:20,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786791693] [2021-08-29 12:57:20,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:57:20,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124933750] [2021-08-29 12:57:20,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124933750] provided 1 perfect and 1 imperfect interpolant sequences [2021-08-29 12:57:20,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-29 12:57:20,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 26 [2021-08-29 12:57:20,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355443899] [2021-08-29 12:57:20,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-29 12:57:20,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:57:20,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-29 12:57:20,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-08-29 12:57:20,088 INFO L87 Difference]: Start difference. First operand 360 states and 409 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:25,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:57:25,480 INFO L93 Difference]: Finished difference Result 381 states and 430 transitions. [2021-08-29 12:57:25,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-29 12:57:25,484 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-29 12:57:25,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:57:25,485 INFO L225 Difference]: With dead ends: 381 [2021-08-29 12:57:25,486 INFO L226 Difference]: Without dead ends: 377 [2021-08-29 12:57:25,486 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1083.42ms TimeCoverageRelationStatistics Valid=310, Invalid=1022, Unknown=0, NotChecked=0, Total=1332 [2021-08-29 12:57:25,486 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4678.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.69ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4712.81ms IncrementalHoareTripleChecker+Time [2021-08-29 12:57:25,487 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 333 Unknown, 0 Unchecked, 0.69ms Time], IncrementalHoareTripleChecker [7 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 4712.81ms Time] [2021-08-29 12:57:25,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-08-29 12:57:25,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 201. [2021-08-29 12:57:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 198 states have (on average 1.1464646464646464) internal successors, (227), 200 states have internal predecessors, (227), 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 12:57:25,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 227 transitions. [2021-08-29 12:57:25,551 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 227 transitions. Word has length 53 [2021-08-29 12:57:25,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:57:25,552 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 227 transitions. [2021-08-29 12:57:25,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:57:25,552 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 227 transitions. [2021-08-29 12:57:25,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-29 12:57:25,553 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:57:25,553 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:57:25,573 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 12:57:25,765 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 12:57:25,765 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-29 12:57:25,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:57:25,765 INFO L82 PathProgramCache]: Analyzing trace with hash 311540980, now seen corresponding path program 1 times [2021-08-29 12:57:25,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:57:25,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629444258] [2021-08-29 12:57:25,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:57:25,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:57:25,771 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:57:25,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570817233] [2021-08-29 12:57:25,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:57:25,771 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:57:25,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:57:25,773 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 12:57:25,774 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 12:57:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:57:25,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-29 12:57:25,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:57:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 33 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-29 12:57:26,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:57:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-29 12:57:27,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:57:27,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629444258] [2021-08-29 12:57:27,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:57:27,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570817233] [2021-08-29 12:57:27,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570817233] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:57:27,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:57:27,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-29 12:57:27,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948712157] [2021-08-29 12:57:27,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-29 12:57:27,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:57:27,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-29 12:57:27,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-08-29 12:57:27,677 INFO L87 Difference]: Start difference. First operand 201 states and 227 transitions. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 18 states have internal predecessors, (110), 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 12:57:27,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:57:27,678 INFO L93 Difference]: Finished difference Result 201 states and 227 transitions. [2021-08-29 12:57:27,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 12:57:27,679 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 18 states have internal predecessors, (110), 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 59 [2021-08-29 12:57:27,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:57:27,679 INFO L225 Difference]: With dead ends: 201 [2021-08-29 12:57:27,679 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 12:57:27,680 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 799.40ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-08-29 12:57:27,681 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.00ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-08-29 12:57:27,681 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-08-29 12:57:27,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 12:57:27,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 12:57:27,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 12:57:27,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 12:57:27,683 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 59 [2021-08-29 12:57:27,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:57:27,683 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 12:57:27,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 18 states have internal predecessors, (110), 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 12:57:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 12:57:27,683 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 12:57:27,686 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2021-08-29 12:57:27,686 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2021-08-29 12:57:27,686 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2021-08-29 12:57:27,686 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2021-08-29 12:57:27,687 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2021-08-29 12:57:27,706 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 12:57:27,896 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 12:57:27,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 12:57:27,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 12:57:27,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 12:57:27,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 12:57:27,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 12:57:27,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 12:57:27,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 12:57:27,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 12:57:27,915 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 12:57:27,915 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 12:57:27,923 INFO L854 garLoopResultBuilder]: At program point L35-2(lines 35 73) the Hoare annotation is: false [2021-08-29 12:57:27,923 INFO L858 garLoopResultBuilder]: For program point L35-3(lines 35 73) no Hoare annotation was computed. [2021-08-29 12:57:27,923 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-08-29 12:57:27,923 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-08-29 12:57:27,923 INFO L854 garLoopResultBuilder]: At program point L11-2(lines 10 16) the Hoare annotation is: false [2021-08-29 12:57:27,923 INFO L858 garLoopResultBuilder]: For program point L11-3(lines 11 14) no Hoare annotation was computed. [2021-08-29 12:57:27,923 INFO L854 garLoopResultBuilder]: At program point L11-5(lines 10 16) the Hoare annotation is: false [2021-08-29 12:57:27,923 INFO L858 garLoopResultBuilder]: For program point L11-6(lines 11 14) no Hoare annotation was computed. [2021-08-29 12:57:27,924 INFO L858 garLoopResultBuilder]: For program point L36(lines 36 37) no Hoare annotation was computed. [2021-08-29 12:57:27,924 INFO L854 garLoopResultBuilder]: At program point L11-8(lines 10 16) the Hoare annotation is: false [2021-08-29 12:57:27,924 INFO L858 garLoopResultBuilder]: For program point L11-9(lines 11 14) no Hoare annotation was computed. [2021-08-29 12:57:27,924 INFO L854 garLoopResultBuilder]: At program point L11-11(lines 55 56) the Hoare annotation is: false [2021-08-29 12:57:27,924 INFO L858 garLoopResultBuilder]: For program point L11-12(lines 11 14) no Hoare annotation was computed. [2021-08-29 12:57:27,924 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-08-29 12:57:27,924 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 12:57:27,924 INFO L861 garLoopResultBuilder]: At program point L11-14(lines 10 16) the Hoare annotation is: true [2021-08-29 12:57:27,924 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 12:57:27,924 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-08-29 12:57:27,924 INFO L858 garLoopResultBuilder]: For program point L12-1(lines 12 13) no Hoare annotation was computed. [2021-08-29 12:57:27,924 INFO L858 garLoopResultBuilder]: For program point L12-2(lines 12 13) no Hoare annotation was computed. [2021-08-29 12:57:27,924 INFO L858 garLoopResultBuilder]: For program point L12-3(lines 12 13) no Hoare annotation was computed. [2021-08-29 12:57:27,924 INFO L858 garLoopResultBuilder]: For program point L12-4(lines 12 13) no Hoare annotation was computed. [2021-08-29 12:57:27,924 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-08-29 12:57:27,925 INFO L858 garLoopResultBuilder]: For program point L7(lines 7 9) no Hoare annotation was computed. [2021-08-29 12:57:27,925 INFO L858 garLoopResultBuilder]: For program point L7-1(lines 7 9) no Hoare annotation was computed. [2021-08-29 12:57:27,925 INFO L858 garLoopResultBuilder]: For program point L7-2(lines 7 9) no Hoare annotation was computed. [2021-08-29 12:57:27,925 INFO L858 garLoopResultBuilder]: For program point L7-3(lines 7 9) no Hoare annotation was computed. [2021-08-29 12:57:27,925 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 12:57:27,925 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-08-29 12:57:27,925 INFO L854 garLoopResultBuilder]: At program point L49-2(lines 49 59) the Hoare annotation is: false [2021-08-29 12:57:27,925 INFO L858 garLoopResultBuilder]: For program point L49-3(lines 49 59) no Hoare annotation was computed. [2021-08-29 12:57:27,925 INFO L858 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-08-29 12:57:27,925 INFO L858 garLoopResultBuilder]: For program point L8-2(line 8) no Hoare annotation was computed. [2021-08-29 12:57:27,925 INFO L858 garLoopResultBuilder]: For program point L8-4(line 8) no Hoare annotation was computed. [2021-08-29 12:57:27,925 INFO L858 garLoopResultBuilder]: For program point L8-6(line 8) no Hoare annotation was computed. [2021-08-29 12:57:27,925 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 12:57:27,925 INFO L861 garLoopResultBuilder]: At program point L75(lines 18 76) the Hoare annotation is: true [2021-08-29 12:57:27,925 INFO L854 garLoopResultBuilder]: At program point L42-2(lines 42 62) the Hoare annotation is: false [2021-08-29 12:57:27,925 INFO L858 garLoopResultBuilder]: For program point L42-3(lines 42 62) no Hoare annotation was computed. [2021-08-29 12:57:27,926 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-08-29 12:57:27,926 INFO L858 garLoopResultBuilder]: For program point L43(lines 43 44) no Hoare annotation was computed. [2021-08-29 12:57:27,928 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 12:57:27,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 12:57:27 BoogieIcfgContainer [2021-08-29 12:57:27,933 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 12:57:27,934 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 12:57:27,934 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 12:57:27,934 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 12:57:27,934 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 12:55:18" (3/4) ... [2021-08-29 12:57:27,936 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 12:57:27,945 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-08-29 12:57:27,945 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-29 12:57:27,945 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 12:57:27,945 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 12:57:27,979 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 12:57:27,979 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 12:57:27,979 INFO L158 Benchmark]: Toolchain (without parser) took 130299.37ms. Allocated memory was 65.0MB in the beginning and 96.5MB in the end (delta: 31.5MB). Free memory was 45.4MB in the beginning and 54.2MB in the end (delta: -8.8MB). Peak memory consumption was 21.5MB. Max. memory is 16.1GB. [2021-08-29 12:57:27,980 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 65.0MB. Free memory was 46.6MB in the beginning and 46.6MB in the end (delta: 48.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 12:57:27,980 INFO L158 Benchmark]: CACSL2BoogieTranslator took 244.86ms. Allocated memory is still 65.0MB. Free memory was 45.2MB in the beginning and 47.9MB in the end (delta: -2.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-08-29 12:57:27,981 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.15ms. Allocated memory is still 65.0MB. Free memory was 47.7MB in the beginning and 46.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 12:57:27,981 INFO L158 Benchmark]: Boogie Preprocessor took 32.27ms. Allocated memory is still 65.0MB. Free memory was 46.2MB in the beginning and 44.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 12:57:27,982 INFO L158 Benchmark]: RCFGBuilder took 248.01ms. Allocated memory is still 65.0MB. Free memory was 44.9MB in the beginning and 35.1MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 12:57:27,982 INFO L158 Benchmark]: TraceAbstraction took 129689.57ms. Allocated memory was 65.0MB in the beginning and 96.5MB in the end (delta: 31.5MB). Free memory was 34.6MB in the beginning and 57.3MB in the end (delta: -22.7MB). Peak memory consumption was 8.0MB. Max. memory is 16.1GB. [2021-08-29 12:57:27,983 INFO L158 Benchmark]: Witness Printer took 45.24ms. Allocated memory is still 96.5MB. Free memory was 57.3MB in the beginning and 54.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 12:57:27,985 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 65.0MB. Free memory was 46.6MB in the beginning and 46.6MB in the end (delta: 48.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 244.86ms. Allocated memory is still 65.0MB. Free memory was 45.2MB in the beginning and 47.9MB in the end (delta: -2.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.15ms. Allocated memory is still 65.0MB. Free memory was 47.7MB in the beginning and 46.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.27ms. Allocated memory is still 65.0MB. Free memory was 46.2MB in the beginning and 44.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 248.01ms. Allocated memory is still 65.0MB. Free memory was 44.9MB in the beginning and 35.1MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 129689.57ms. Allocated memory was 65.0MB in the beginning and 96.5MB in the end (delta: 31.5MB). Free memory was 34.6MB in the beginning and 57.3MB in the end (delta: -22.7MB). Peak memory consumption was 8.0MB. Max. memory is 16.1GB. * Witness Printer took 45.24ms. Allocated memory is still 96.5MB. Free memory was 57.3MB in the beginning and 54.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. 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 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 129637.66ms, OverallIterations: 19, TraceHistogramMax: 5, EmptinessCheckTime: 36.50ms, AutomataDifference: 110774.63ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 25.79ms, InitialAbstractionConstructionTime: 16.47ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 8 mSolverCounterUnknown, 3424 SdHoareTripleChecker+Valid, 54809.79ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3424 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 53886.78ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2565 mSDsCounter, 936 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7257 IncrementalHoareTripleChecker+Invalid, 8201 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 936 mSolverCounterUnsat, 0 mSDtfsCounter, 7257 mSolverCounterSat, 54.04ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1297 GetRequests, 821 SyntacticMatches, 13 SemanticMatches, 463 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10130 ImplicationChecksByTransitivity, 59523.17ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=541occurred in iteration=13, InterpolantAutomatonStates: 364, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 759.80ms AutomataMinimizationTime, 19 MinimizatonAttempts, 1437 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 9 LocationsWithAnnotation, 9 PreInvPairs, 11 NumberOfFragments, 9 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 15.70ms HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 4.98ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 124.80ms SsaConstructionTime, 348.19ms SatisfiabilityAnalysisTime, 12871.73ms InterpolantComputationTime, 604 NumberOfCodeBlocks, 587 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 993 ConstructedInterpolants, 0 QuantifiedInterpolants, 10874 SizeOfPredicates, 186 NumberOfNonLiveVariables, 2431 ConjunctsInSsa, 486 ConjunctsInUnsatCore, 30 InterpolantComputations, 9 PerfectInterpolantSequences, 257/478 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 - AllSpecificationsHoldResult: All specifications hold 5 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 55]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 0 RESULT: Ultimate proved your program to be correct! [2021-08-29 12:57:28,064 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...