./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/array_2-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/loop-acceleration/array_2-1.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 d1726b0c52a0be10cb8b374bfde8cdbfe3513d4b934203f7e56a3a1bce5e9e5b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:16:32,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:16:32,702 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:16:32,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:16:32,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:16:32,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:16:32,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:16:32,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:16:32,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:16:32,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:16:32,751 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:16:32,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:16:32,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:16:32,753 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:16:32,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:16:32,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:16:32,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:16:32,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:16:32,758 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:16:32,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:16:32,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:16:32,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:16:32,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:16:32,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:16:32,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:16:32,766 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:16:32,767 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:16:32,768 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:16:32,768 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:16:32,769 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:16:32,769 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:16:32,770 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:16:32,770 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:16:32,771 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:16:32,772 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:16:32,772 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:16:32,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:16:32,773 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:16:32,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:16:32,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:16:32,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:16:32,778 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 12:16:32,805 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:16:32,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:16:32,805 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:16:32,806 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:16:32,806 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:16:32,806 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:16:32,807 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:16:32,807 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:16:32,807 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:16:32,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:16:32,808 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:16:32,808 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 12:16:32,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:16:32,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:16:32,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:16:32,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:16:32,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:16:32,809 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:16:32,809 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:16:32,809 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:16:32,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:16:32,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:16:32,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:16:32,810 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:16:32,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:16:32,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:16:32,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:16:32,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:16:32,810 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 12:16:32,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 12:16:32,811 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:16:32,818 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:16:32,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:16:32,819 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:16:32,819 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d1726b0c52a0be10cb8b374bfde8cdbfe3513d4b934203f7e56a3a1bce5e9e5b [2021-12-21 12:16:33,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:16:33,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:16:33,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:16:33,051 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:16:33,051 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:16:33,052 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/array_2-1.i [2021-12-21 12:16:33,104 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9decfc3d9/4cebd342f38e424f91cf65f6c1b30792/FLAGba2110e4a [2021-12-21 12:16:33,440 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:16:33,441 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_2-1.i [2021-12-21 12:16:33,446 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9decfc3d9/4cebd342f38e424f91cf65f6c1b30792/FLAGba2110e4a [2021-12-21 12:16:33,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9decfc3d9/4cebd342f38e424f91cf65f6c1b30792 [2021-12-21 12:16:33,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:16:33,471 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:16:33,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:16:33,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:16:33,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:16:33,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:16:33" (1/1) ... [2021-12-21 12:16:33,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10ca0088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:33, skipping insertion in model container [2021-12-21 12:16:33,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:16:33" (1/1) ... [2021-12-21 12:16:33,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:16:33,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:16:33,692 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/loop-acceleration/array_2-1.i[849,862] [2021-12-21 12:16:33,714 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:16:33,719 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:16:33,730 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/loop-acceleration/array_2-1.i[849,862] [2021-12-21 12:16:33,737 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:16:33,748 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:16:33,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:33 WrapperNode [2021-12-21 12:16:33,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:16:33,749 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:16:33,750 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:16:33,750 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:16:33,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:33" (1/1) ... [2021-12-21 12:16:33,761 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:33" (1/1) ... [2021-12-21 12:16:33,776 INFO L137 Inliner]: procedures = 16, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2021-12-21 12:16:33,776 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:16:33,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:16:33,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:16:33,777 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:16:33,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:33" (1/1) ... [2021-12-21 12:16:33,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:33" (1/1) ... [2021-12-21 12:16:33,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:33" (1/1) ... [2021-12-21 12:16:33,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:33" (1/1) ... [2021-12-21 12:16:33,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:33" (1/1) ... [2021-12-21 12:16:33,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:33" (1/1) ... [2021-12-21 12:16:33,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:33" (1/1) ... [2021-12-21 12:16:33,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:16:33,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:16:33,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:16:33,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:16:33,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:33" (1/1) ... [2021-12-21 12:16:33,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:16:33,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:16:33,822 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 12:16:33,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 12:16:33,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:16:33,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 12:16:33,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 12:16:33,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 12:16:33,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:16:33,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:16:33,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 12:16:33,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 12:16:33,902 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:16:33,903 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:16:33,991 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:16:33,996 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:16:33,996 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 12:16:33,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:16:33 BoogieIcfgContainer [2021-12-21 12:16:33,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:16:34,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:16:34,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:16:34,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:16:34,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:16:33" (1/3) ... [2021-12-21 12:16:34,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e10bf7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:16:34, skipping insertion in model container [2021-12-21 12:16:34,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:16:33" (2/3) ... [2021-12-21 12:16:34,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e10bf7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:16:34, skipping insertion in model container [2021-12-21 12:16:34,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:16:33" (3/3) ... [2021-12-21 12:16:34,005 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-1.i [2021-12-21 12:16:34,009 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:16:34,010 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:16:34,050 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:16:34,059 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 12:16:34,061 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:16:34,076 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:16:34,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 12:16:34,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:16:34,080 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:16:34,081 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:16:34,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:16:34,092 INFO L85 PathProgramCache]: Analyzing trace with hash 212047733, now seen corresponding path program 1 times [2021-12-21 12:16:34,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:16:34,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230388320] [2021-12-21 12:16:34,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:16:34,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:16:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:16:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:16:34,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:16:34,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230388320] [2021-12-21 12:16:34,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230388320] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:16:34,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:16:34,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 12:16:34,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803394623] [2021-12-21 12:16:34,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:16:34,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 12:16:34,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:16:34,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 12:16:34,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:16:34,372 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 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) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:16:34,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:16:34,443 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2021-12-21 12:16:34,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 12:16:34,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-21 12:16:34,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:16:34,452 INFO L225 Difference]: With dead ends: 30 [2021-12-21 12:16:34,452 INFO L226 Difference]: Without dead ends: 15 [2021-12-21 12:16:34,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:16:34,457 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:16:34,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:16:34,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-21 12:16:34,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2021-12-21 12:16:34,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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) [2021-12-21 12:16:34,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-12-21 12:16:34,519 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2021-12-21 12:16:34,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:16:34,520 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-12-21 12:16:34,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:16:34,521 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-12-21 12:16:34,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 12:16:34,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:16:34,522 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:16:34,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 12:16:34,523 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:16:34,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:16:34,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1312443705, now seen corresponding path program 1 times [2021-12-21 12:16:34,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:16:34,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651312910] [2021-12-21 12:16:34,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:16:34,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:16:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:16:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:16:34,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:16:34,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651312910] [2021-12-21 12:16:34,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651312910] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:16:34,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643475172] [2021-12-21 12:16:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:16:34,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:16:34,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:16:34,624 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:16:34,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 12:16:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:16:34,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 12:16:34,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:16:34,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:16:34,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:16:34,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:16:34,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643475172] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:16:34,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:16:34,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-21 12:16:34,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837020292] [2021-12-21 12:16:34,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:16:34,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 12:16:34,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:16:34,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 12:16:34,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 12:16:34,802 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:16:34,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:16:34,858 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-12-21 12:16:34,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:16:34,859 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 12 [2021-12-21 12:16:34,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:16:34,863 INFO L225 Difference]: With dead ends: 33 [2021-12-21 12:16:34,864 INFO L226 Difference]: Without dead ends: 25 [2021-12-21 12:16:34,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 12:16:34,866 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:16:34,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 16 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:16:34,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-21 12:16:34,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-21 12:16:34,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:16:34,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-12-21 12:16:34,883 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 12 [2021-12-21 12:16:34,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:16:34,884 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-12-21 12:16:34,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:16:34,884 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-12-21 12:16:34,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-21 12:16:34,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:16:34,886 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:16:34,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 12:16:35,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:16:35,100 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:16:35,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:16:35,100 INFO L85 PathProgramCache]: Analyzing trace with hash 682476165, now seen corresponding path program 2 times [2021-12-21 12:16:35,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:16:35,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993330079] [2021-12-21 12:16:35,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:16:35,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:16:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:16:35,209 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 12:16:35,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:16:35,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993330079] [2021-12-21 12:16:35,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993330079] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:16:35,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615145667] [2021-12-21 12:16:35,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 12:16:35,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:16:35,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:16:35,211 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:16:35,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 12:16:35,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 12:16:35,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:16:35,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 12:16:35,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:16:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 12:16:35,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:16:35,486 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 12:16:35,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615145667] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:16:35,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:16:35,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-21 12:16:35,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582511264] [2021-12-21 12:16:35,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:16:35,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 12:16:35,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:16:35,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 12:16:35,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-21 12:16:35,494 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:16:35,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:16:35,580 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2021-12-21 12:16:35,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 12:16:35,581 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-21 12:16:35,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:16:35,584 INFO L225 Difference]: With dead ends: 63 [2021-12-21 12:16:35,584 INFO L226 Difference]: Without dead ends: 49 [2021-12-21 12:16:35,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-21 12:16:35,588 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:16:35,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 16 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:16:35,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-21 12:16:35,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-21 12:16:35,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:16:35,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-12-21 12:16:35,601 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 24 [2021-12-21 12:16:35,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:16:35,601 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-12-21 12:16:35,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:16:35,602 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-12-21 12:16:35,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-21 12:16:35,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:16:35,603 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:16:35,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 12:16:35,818 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 [2021-12-21 12:16:35,819 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:16:35,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:16:35,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1926519011, now seen corresponding path program 3 times [2021-12-21 12:16:35,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:16:35,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18183433] [2021-12-21 12:16:35,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:16:35,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:16:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:16:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-21 12:16:36,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:16:36,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18183433] [2021-12-21 12:16:36,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18183433] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:16:36,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239817938] [2021-12-21 12:16:36,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 12:16:36,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:16:36,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:16:36,044 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:16:36,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 12:16:37,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-21 12:16:37,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:16:37,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 12:16:37,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:16:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-21 12:16:38,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:16:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-21 12:16:38,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239817938] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:16:38,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:16:38,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-21 12:16:38,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842601380] [2021-12-21 12:16:38,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:16:38,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-21 12:16:38,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:16:38,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-21 12:16:38,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-21 12:16:38,389 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:16:38,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:16:38,569 INFO L93 Difference]: Finished difference Result 123 states and 148 transitions. [2021-12-21 12:16:38,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 12:16:38,570 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-21 12:16:38,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:16:38,572 INFO L225 Difference]: With dead ends: 123 [2021-12-21 12:16:38,573 INFO L226 Difference]: Without dead ends: 97 [2021-12-21 12:16:38,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-21 12:16:38,576 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 66 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:16:38,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 24 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:16:38,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-21 12:16:38,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-12-21 12:16:38,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:16:38,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2021-12-21 12:16:38,600 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 48 [2021-12-21 12:16:38,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:16:38,601 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2021-12-21 12:16:38,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:16:38,604 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2021-12-21 12:16:38,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-21 12:16:38,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:16:38,608 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:16:38,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 12:16:38,834 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 [2021-12-21 12:16:38,835 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:16:38,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:16:38,835 INFO L85 PathProgramCache]: Analyzing trace with hash -154707891, now seen corresponding path program 4 times [2021-12-21 12:16:38,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:16:38,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990037915] [2021-12-21 12:16:38,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:16:38,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:16:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:16:39,242 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-12-21 12:16:39,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:16:39,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990037915] [2021-12-21 12:16:39,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990037915] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:16:39,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573424832] [2021-12-21 12:16:39,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 12:16:39,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:16:39,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:16:39,248 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:16:39,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 12:16:39,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 12:16:39,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:16:39,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 12:16:39,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:16:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-12-21 12:16:39,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:16:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-12-21 12:16:40,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573424832] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:16:40,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:16:40,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-21 12:16:40,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406487405] [2021-12-21 12:16:40,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:16:40,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-21 12:16:40,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:16:40,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-21 12:16:40,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-21 12:16:40,530 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 49 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:16:40,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:16:40,890 INFO L93 Difference]: Finished difference Result 243 states and 292 transitions. [2021-12-21 12:16:40,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-21 12:16:40,890 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 49 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-21 12:16:40,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:16:40,891 INFO L225 Difference]: With dead ends: 243 [2021-12-21 12:16:40,891 INFO L226 Difference]: Without dead ends: 193 [2021-12-21 12:16:40,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-21 12:16:40,893 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 169 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 12:16:40,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 36 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 12:16:40,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-12-21 12:16:40,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2021-12-21 12:16:40,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 192 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:16:40,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2021-12-21 12:16:40,906 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 96 [2021-12-21 12:16:40,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:16:40,906 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2021-12-21 12:16:40,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 49 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:16:40,906 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2021-12-21 12:16:40,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-21 12:16:40,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:16:40,908 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:16:40,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 12:16:41,131 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 [2021-12-21 12:16:41,132 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:16:41,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:16:41,132 INFO L85 PathProgramCache]: Analyzing trace with hash -224503123, now seen corresponding path program 5 times [2021-12-21 12:16:41,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:16:41,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358483811] [2021-12-21 12:16:41,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:16:41,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:16:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:16:42,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2021-12-21 12:16:42,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:16:42,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358483811] [2021-12-21 12:16:42,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358483811] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:16:42,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845380619] [2021-12-21 12:16:42,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 12:16:42,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:16:42,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:16:42,319 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:16:42,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process