./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/avg.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/reducercommutativity/avg.i -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 40ea744e34964af110b03a02fd30edb5f9eceb5eca9cf560d6cf7ef319b1e1e5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 09:36:18,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 09:36:18,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 09:36:18,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 09:36:18,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 09:36:18,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 09:36:18,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 09:36:18,797 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 09:36:18,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 09:36:18,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 09:36:18,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 09:36:18,804 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 09:36:18,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 09:36:18,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 09:36:18,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 09:36:18,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 09:36:18,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 09:36:18,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 09:36:18,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 09:36:18,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 09:36:18,817 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 09:36:18,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 09:36:18,819 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 09:36:18,819 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 09:36:18,820 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 09:36:18,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 09:36:18,826 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 09:36:18,826 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 09:36:18,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 09:36:18,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 09:36:18,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 09:36:18,829 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 09:36:18,830 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 09:36:18,831 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 09:36:18,831 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 09:36:18,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 09:36:18,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 09:36:18,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 09:36:18,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 09:36:18,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 09:36:18,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 09:36:18,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 09:36:18,836 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 09:36:18,862 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 09:36:18,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 09:36:18,863 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 09:36:18,863 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 09:36:18,864 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 09:36:18,864 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 09:36:18,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 09:36:18,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 09:36:18,865 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 09:36:18,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 09:36:18,865 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 09:36:18,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 09:36:18,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 09:36:18,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 09:36:18,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 09:36:18,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 09:36:18,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 09:36:18,867 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 09:36:18,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 09:36:18,869 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 09:36:18,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 09:36:18,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 09:36:18,874 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 09:36:18,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 09:36:18,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:36:18,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 09:36:18,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 09:36:18,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 09:36:18,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 09:36:18,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 09:36:18,876 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 09:36:18,876 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 09:36:18,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 09:36:18,877 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 40ea744e34964af110b03a02fd30edb5f9eceb5eca9cf560d6cf7ef319b1e1e5 [2022-07-22 09:36:19,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 09:36:19,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 09:36:19,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 09:36:19,069 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 09:36:19,069 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 09:36:19,070 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/avg.i [2022-07-22 09:36:19,111 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0ed85db7/dde202bc1d3b42c89217c1b0d13bcb91/FLAGdbb289982 [2022-07-22 09:36:19,457 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 09:36:19,457 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/avg.i [2022-07-22 09:36:19,462 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0ed85db7/dde202bc1d3b42c89217c1b0d13bcb91/FLAGdbb289982 [2022-07-22 09:36:19,487 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0ed85db7/dde202bc1d3b42c89217c1b0d13bcb91 [2022-07-22 09:36:19,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 09:36:19,490 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 09:36:19,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 09:36:19,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 09:36:19,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 09:36:19,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:36:19" (1/1) ... [2022-07-22 09:36:19,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1903a1e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:19, skipping insertion in model container [2022-07-22 09:36:19,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:36:19" (1/1) ... [2022-07-22 09:36:19,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 09:36:19,511 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 09:36:19,676 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/avg.i[1286,1299] [2022-07-22 09:36:19,679 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:36:19,689 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 09:36:19,714 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/avg.i[1286,1299] [2022-07-22 09:36:19,715 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:36:19,726 INFO L208 MainTranslator]: Completed translation [2022-07-22 09:36:19,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:19 WrapperNode [2022-07-22 09:36:19,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 09:36:19,728 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 09:36:19,728 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 09:36:19,728 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 09:36:19,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:19" (1/1) ... [2022-07-22 09:36:19,744 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:19" (1/1) ... [2022-07-22 09:36:19,761 INFO L137 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2022-07-22 09:36:19,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 09:36:19,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 09:36:19,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 09:36:19,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 09:36:19,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:19" (1/1) ... [2022-07-22 09:36:19,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:19" (1/1) ... [2022-07-22 09:36:19,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:19" (1/1) ... [2022-07-22 09:36:19,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:19" (1/1) ... [2022-07-22 09:36:19,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:19" (1/1) ... [2022-07-22 09:36:19,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:19" (1/1) ... [2022-07-22 09:36:19,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:19" (1/1) ... [2022-07-22 09:36:19,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 09:36:19,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 09:36:19,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 09:36:19,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 09:36:19,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:19" (1/1) ... [2022-07-22 09:36:19,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:36:19,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:36:19,823 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) [2022-07-22 09:36:19,838 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 [2022-07-22 09:36:19,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 09:36:19,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 09:36:19,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 09:36:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 09:36:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2022-07-22 09:36:19,859 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2022-07-22 09:36:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 09:36:19,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 09:36:19,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 09:36:19,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 09:36:19,916 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 09:36:19,918 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 09:36:20,083 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 09:36:20,087 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 09:36:20,087 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 09:36:20,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:36:20 BoogieIcfgContainer [2022-07-22 09:36:20,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 09:36:20,090 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 09:36:20,090 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 09:36:20,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 09:36:20,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:36:19" (1/3) ... [2022-07-22 09:36:20,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@720dee85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:36:20, skipping insertion in model container [2022-07-22 09:36:20,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:19" (2/3) ... [2022-07-22 09:36:20,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@720dee85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:36:20, skipping insertion in model container [2022-07-22 09:36:20,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:36:20" (3/3) ... [2022-07-22 09:36:20,094 INFO L111 eAbstractionObserver]: Analyzing ICFG avg.i [2022-07-22 09:36:20,120 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 09:36:20,120 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 09:36:20,161 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 09:36:20,167 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3bba1a0a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@424a914a [2022-07-22 09:36:20,168 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 09:36:20,171 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:36:20,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 09:36:20,177 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:36:20,178 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:36:20,179 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:36:20,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:36:20,183 INFO L85 PathProgramCache]: Analyzing trace with hash 471565210, now seen corresponding path program 1 times [2022-07-22 09:36:20,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:36:20,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496806102] [2022-07-22 09:36:20,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:36:20,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:36:20,286 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 09:36:20,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103828735] [2022-07-22 09:36:20,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:36:20,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:36:20,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:36:20,289 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) [2022-07-22 09:36:20,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 09:36:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:36:20,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-22 09:36:20,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:36:20,410 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 09:36:20,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 09:36:20,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:36:20,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496806102] [2022-07-22 09:36:20,411 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 09:36:20,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103828735] [2022-07-22 09:36:20,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103828735] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:36:20,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:36:20,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 09:36:20,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167081844] [2022-07-22 09:36:20,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:36:20,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 09:36:20,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:36:20,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 09:36:20,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 09:36:20,437 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 09:36:20,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:36:20,452 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2022-07-22 09:36:20,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 09:36:20,454 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-07-22 09:36:20,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:36:20,459 INFO L225 Difference]: With dead ends: 48 [2022-07-22 09:36:20,459 INFO L226 Difference]: Without dead ends: 21 [2022-07-22 09:36:20,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 09:36:20,466 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:36:20,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:36:20,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-22 09:36:20,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-22 09:36:20,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:36:20,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-07-22 09:36:20,494 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 28 [2022-07-22 09:36:20,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:36:20,496 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-07-22 09:36:20,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 09:36:20,496 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-07-22 09:36:20,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 09:36:20,498 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:36:20,498 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:36:20,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 09:36:20,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-22 09:36:20,699 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:36:20,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:36:20,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1631628524, now seen corresponding path program 1 times [2022-07-22 09:36:20,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:36:20,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554406642] [2022-07-22 09:36:20,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:36:20,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:36:20,735 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 09:36:20,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690881064] [2022-07-22 09:36:20,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:36:20,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:36:20,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:36:20,736 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) [2022-07-22 09:36:20,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 09:36:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:36:20,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 09:36:20,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:36:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 09:36:20,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 09:36:20,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:36:20,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554406642] [2022-07-22 09:36:20,864 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 09:36:20,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690881064] [2022-07-22 09:36:20,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690881064] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:36:20,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:36:20,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 09:36:20,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961992745] [2022-07-22 09:36:20,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:36:20,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 09:36:20,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:36:20,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 09:36:20,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 09:36:20,870 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 09:36:20,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:36:20,925 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-07-22 09:36:20,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 09:36:20,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-07-22 09:36:20,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:36:20,927 INFO L225 Difference]: With dead ends: 40 [2022-07-22 09:36:20,927 INFO L226 Difference]: Without dead ends: 23 [2022-07-22 09:36:20,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 09:36:20,930 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:36:20,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 24 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:36:20,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-22 09:36:20,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-07-22 09:36:20,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:36:20,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-07-22 09:36:20,940 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 28 [2022-07-22 09:36:20,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:36:20,940 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-07-22 09:36:20,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 09:36:20,941 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-07-22 09:36:20,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-22 09:36:20,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:36:20,942 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:36:20,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 09:36:21,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-07-22 09:36:21,153 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:36:21,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:36:21,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1116044242, now seen corresponding path program 1 times [2022-07-22 09:36:21,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:36:21,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24962256] [2022-07-22 09:36:21,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:36:21,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:36:21,171 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 09:36:21,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606336016] [2022-07-22 09:36:21,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:36:21,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:36:21,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:36:21,176 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) [2022-07-22 09:36:21,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 09:36:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:36:21,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 09:36:21,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:36:21,269 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 09:36:21,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:36:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 09:36:21,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:36:21,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24962256] [2022-07-22 09:36:21,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 09:36:21,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606336016] [2022-07-22 09:36:21,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606336016] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:36:21,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 09:36:21,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2022-07-22 09:36:21,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612811872] [2022-07-22 09:36:21,333 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 09:36:21,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 09:36:21,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:36:21,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 09:36:21,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-22 09:36:21,335 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 09:36:21,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:36:21,385 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2022-07-22 09:36:21,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 09:36:21,386 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 34 [2022-07-22 09:36:21,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:36:21,387 INFO L225 Difference]: With dead ends: 43 [2022-07-22 09:36:21,387 INFO L226 Difference]: Without dead ends: 25 [2022-07-22 09:36:21,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-22 09:36:21,388 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:36:21,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 39 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:36:21,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-22 09:36:21,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-22 09:36:21,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:36:21,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-07-22 09:36:21,392 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 34 [2022-07-22 09:36:21,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:36:21,392 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-07-22 09:36:21,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 09:36:21,392 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-07-22 09:36:21,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-22 09:36:21,393 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:36:21,393 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:36:21,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-22 09:36:21,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:36:21,608 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:36:21,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:36:21,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1547444720, now seen corresponding path program 2 times [2022-07-22 09:36:21,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:36:21,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657400003] [2022-07-22 09:36:21,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:36:21,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:36:21,621 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 09:36:21,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019818252] [2022-07-22 09:36:21,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:36:21,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:36:21,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:36:21,630 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) [2022-07-22 09:36:21,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 09:36:21,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:36:21,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:36:21,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 09:36:21,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:36:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-22 09:36:21,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 09:36:21,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:36:21,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657400003] [2022-07-22 09:36:21,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 09:36:21,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019818252] [2022-07-22 09:36:21,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019818252] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:36:21,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:36:21,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 09:36:21,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308098928] [2022-07-22 09:36:21,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:36:21,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 09:36:21,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:36:21,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 09:36:21,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 09:36:21,744 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 09:36:21,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:36:21,771 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2022-07-22 09:36:21,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 09:36:21,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-07-22 09:36:21,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:36:21,772 INFO L225 Difference]: With dead ends: 41 [2022-07-22 09:36:21,772 INFO L226 Difference]: Without dead ends: 26 [2022-07-22 09:36:21,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 09:36:21,773 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:36:21,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:36:21,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-22 09:36:21,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-07-22 09:36:21,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:36:21,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-07-22 09:36:21,777 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 40 [2022-07-22 09:36:21,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:36:21,777 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-07-22 09:36:21,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 09:36:21,777 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-07-22 09:36:21,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-22 09:36:21,778 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:36:21,778 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:36:21,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 09:36:21,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:36:21,991 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:36:21,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:36:21,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1088129362, now seen corresponding path program 1 times [2022-07-22 09:36:21,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:36:21,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603040361] [2022-07-22 09:36:21,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:36:21,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:36:22,005 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 09:36:22,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339416552] [2022-07-22 09:36:22,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:36:22,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:36:22,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:36:22,008 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) [2022-07-22 09:36:22,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 09:36:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:36:22,290 WARN L261 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 99 conjunts are in the unsatisfiable core [2022-07-22 09:36:22,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:36:22,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:36:23,002 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 09:36:23,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 269 treesize of output 139 [2022-07-22 09:36:44,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:36:44,606 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 09:36:44,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 467 treesize of output 242 [2022-07-22 09:36:56,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 09:36:56,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:36:56,272 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 09:36:56,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 384 treesize of output 254 [2022-07-22 09:37:08,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:37:08,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 09:37:08,591 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 09:37:08,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 705 treesize of output 348 [2022-07-22 09:37:27,714 WARN L233 SmtUtils]: Spent 16.98s on a formula simplification. DAG size of input: 69 DAG size of output: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 09:37:37,063 WARN L233 SmtUtils]: Spent 8.26s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 09:37:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 09:37:37,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:39:21,066 WARN L233 SmtUtils]: Spent 23.33s on a formula simplification. DAG size of input: 138 DAG size of output: 133 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 09:40:17,943 WARN L233 SmtUtils]: Spent 32.08s on a formula simplification. DAG size of input: 122 DAG size of output: 117 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)