./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/forester-heap/dll-reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/forester-heap/dll-reverse.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 52fc70d7844651686a4c27e057f507f0498e7d5f7c17f07a035699d1630f6ea2 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 23:48:40,023 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 23:48:40,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 23:48:40,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 23:48:40,063 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 23:48:40,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 23:48:40,066 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 23:48:40,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 23:48:40,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 23:48:40,076 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 23:48:40,083 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 23:48:40,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 23:48:40,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 23:48:40,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 23:48:40,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 23:48:40,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 23:48:40,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 23:48:40,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 23:48:40,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 23:48:40,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 23:48:40,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 23:48:40,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 23:48:40,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 23:48:40,104 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 23:48:40,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 23:48:40,109 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 23:48:40,109 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 23:48:40,110 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 23:48:40,110 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 23:48:40,111 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 23:48:40,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 23:48:40,112 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 23:48:40,113 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 23:48:40,114 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 23:48:40,114 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 23:48:40,115 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 23:48:40,115 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 23:48:40,115 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 23:48:40,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 23:48:40,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 23:48:40,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 23:48:40,119 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 23:48:40,144 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 23:48:40,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 23:48:40,145 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 23:48:40,145 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 23:48:40,146 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 23:48:40,146 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 23:48:40,147 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 23:48:40,147 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 23:48:40,147 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 23:48:40,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 23:48:40,148 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 23:48:40,148 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 23:48:40,148 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 23:48:40,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 23:48:40,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 23:48:40,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 23:48:40,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 23:48:40,149 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 23:48:40,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 23:48:40,149 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 23:48:40,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 23:48:40,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 23:48:40,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 23:48:40,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 23:48:40,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:48:40,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 23:48:40,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 23:48:40,150 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 23:48:40,151 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 23:48:40,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 23:48:40,151 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 23:48:40,151 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 23:48:40,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 23:48:40,151 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52fc70d7844651686a4c27e057f507f0498e7d5f7c17f07a035699d1630f6ea2 [2021-12-27 23:48:40,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 23:48:40,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 23:48:40,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 23:48:40,418 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 23:48:40,419 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 23:48:40,420 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/dll-reverse.i [2021-12-27 23:48:40,465 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7950f52c2/ab3512a3c0d84b71914d2d6520701f02/FLAGd67bf0237 [2021-12-27 23:48:40,842 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 23:48:40,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-reverse.i [2021-12-27 23:48:40,853 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7950f52c2/ab3512a3c0d84b71914d2d6520701f02/FLAGd67bf0237 [2021-12-27 23:48:41,220 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7950f52c2/ab3512a3c0d84b71914d2d6520701f02 [2021-12-27 23:48:41,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 23:48:41,224 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 23:48:41,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 23:48:41,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 23:48:41,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 23:48:41,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:48:41" (1/1) ... [2021-12-27 23:48:41,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77af4164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:41, skipping insertion in model container [2021-12-27 23:48:41,237 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:48:41" (1/1) ... [2021-12-27 23:48:41,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 23:48:41,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 23:48:41,469 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/forester-heap/dll-reverse.i[22309,22322] [2021-12-27 23:48:41,473 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/forester-heap/dll-reverse.i[22394,22407] [2021-12-27 23:48:41,483 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/forester-heap/dll-reverse.i[22924,22937] [2021-12-27 23:48:41,489 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:48:41,496 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 23:48:41,537 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/forester-heap/dll-reverse.i[22309,22322] [2021-12-27 23:48:41,544 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/forester-heap/dll-reverse.i[22394,22407] [2021-12-27 23:48:41,547 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/forester-heap/dll-reverse.i[22924,22937] [2021-12-27 23:48:41,552 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:48:41,570 INFO L208 MainTranslator]: Completed translation [2021-12-27 23:48:41,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:41 WrapperNode [2021-12-27 23:48:41,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 23:48:41,571 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 23:48:41,572 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 23:48:41,572 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 23:48:41,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:41" (1/1) ... [2021-12-27 23:48:41,603 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:41" (1/1) ... [2021-12-27 23:48:41,626 INFO L137 Inliner]: procedures = 119, calls = 41, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 144 [2021-12-27 23:48:41,627 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 23:48:41,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 23:48:41,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 23:48:41,628 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 23:48:41,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:41" (1/1) ... [2021-12-27 23:48:41,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:41" (1/1) ... [2021-12-27 23:48:41,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:41" (1/1) ... [2021-12-27 23:48:41,645 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:41" (1/1) ... [2021-12-27 23:48:41,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:41" (1/1) ... [2021-12-27 23:48:41,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:41" (1/1) ... [2021-12-27 23:48:41,660 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:41" (1/1) ... [2021-12-27 23:48:41,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 23:48:41,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 23:48:41,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 23:48:41,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 23:48:41,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:41" (1/1) ... [2021-12-27 23:48:41,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:48:41,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:48:41,690 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) [2021-12-27 23:48:41,697 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 [2021-12-27 23:48:41,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-27 23:48:41,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-27 23:48:41,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-27 23:48:41,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 23:48:41,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-27 23:48:41,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-27 23:48:41,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-27 23:48:41,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 23:48:41,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 23:48:41,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 23:48:41,790 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 23:48:41,791 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 23:48:42,004 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 23:48:42,008 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 23:48:42,009 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-12-27 23:48:42,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:48:42 BoogieIcfgContainer [2021-12-27 23:48:42,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 23:48:42,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 23:48:42,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 23:48:42,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 23:48:42,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 11:48:41" (1/3) ... [2021-12-27 23:48:42,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ce8fb3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:48:42, skipping insertion in model container [2021-12-27 23:48:42,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:41" (2/3) ... [2021-12-27 23:48:42,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ce8fb3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:48:42, skipping insertion in model container [2021-12-27 23:48:42,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:48:42" (3/3) ... [2021-12-27 23:48:42,016 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-reverse.i [2021-12-27 23:48:42,020 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 23:48:42,020 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-12-27 23:48:42,051 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 23:48:42,056 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 [2021-12-27 23:48:42,056 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-27 23:48:42,066 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:48:42,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-27 23:48:42,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:48:42,070 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:48:42,071 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:48:42,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:48:42,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1813527409, now seen corresponding path program 1 times [2021-12-27 23:48:42,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:48:42,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17795971] [2021-12-27 23:48:42,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:48:42,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:48:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:48:42,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:48:42,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:48:42,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17795971] [2021-12-27 23:48:42,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17795971] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:48:42,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:48:42,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 23:48:42,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259521095] [2021-12-27 23:48:42,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:48:42,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-27 23:48:42,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:48:42,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-27 23:48:42,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 23:48:42,293 INFO L87 Difference]: Start difference. First operand has 37 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-12-27 23:48:42,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:48:42,310 INFO L93 Difference]: Finished difference Result 70 states and 112 transitions. [2021-12-27 23:48:42,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-27 23:48:42,312 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-12-27 23:48:42,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:48:42,318 INFO L225 Difference]: With dead ends: 70 [2021-12-27 23:48:42,318 INFO L226 Difference]: Without dead ends: 31 [2021-12-27 23:48:42,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 23:48:42,325 INFO L933 BasicCegarLoop]: 45 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, 45 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 [2021-12-27 23:48:42,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 23:48:42,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-27 23:48:42,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-27 23:48:42,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 30 states have internal predecessors, (38), 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) [2021-12-27 23:48:42,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-12-27 23:48:42,348 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 7 [2021-12-27 23:48:42,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:48:42,349 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-12-27 23:48:42,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-12-27 23:48:42,349 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-12-27 23:48:42,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-27 23:48:42,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:48:42,350 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:48:42,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 23:48:42,350 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:48:42,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:48:42,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1038813004, now seen corresponding path program 1 times [2021-12-27 23:48:42,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:48:42,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271417946] [2021-12-27 23:48:42,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:48:42,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:48:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:48:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:48:42,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:48:42,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271417946] [2021-12-27 23:48:42,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271417946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:48:42,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:48:42,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 23:48:42,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697375787] [2021-12-27 23:48:42,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:48:42,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 23:48:42,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:48:42,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 23:48:42,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-27 23:48:42,473 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:48:42,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:48:42,597 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2021-12-27 23:48:42,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-27 23:48:42,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-27 23:48:42,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:48:42,598 INFO L225 Difference]: With dead ends: 71 [2021-12-27 23:48:42,599 INFO L226 Difference]: Without dead ends: 45 [2021-12-27 23:48:42,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-27 23:48:42,600 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 23:48:42,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 92 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 23:48:42,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-27 23:48:42,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2021-12-27 23:48:42,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:48:42,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-12-27 23:48:42,604 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 10 [2021-12-27 23:48:42,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:48:42,604 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-12-27 23:48:42,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:48:42,605 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-12-27 23:48:42,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-27 23:48:42,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:48:42,605 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:48:42,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-27 23:48:42,605 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:48:42,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:48:42,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1038754672, now seen corresponding path program 1 times [2021-12-27 23:48:42,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:48:42,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640022783] [2021-12-27 23:48:42,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:48:42,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:48:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:48:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:48:42,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:48:42,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640022783] [2021-12-27 23:48:42,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640022783] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:48:42,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:48:42,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 23:48:42,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647503627] [2021-12-27 23:48:42,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:48:42,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 23:48:42,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:48:42,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 23:48:42,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-27 23:48:42,645 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:48:42,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:48:42,714 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2021-12-27 23:48:42,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 23:48:42,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-27 23:48:42,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:48:42,716 INFO L225 Difference]: With dead ends: 64 [2021-12-27 23:48:42,717 INFO L226 Difference]: Without dead ends: 50 [2021-12-27 23:48:42,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-27 23:48:42,718 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 23:48:42,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 54 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 23:48:42,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-27 23:48:42,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-12-27 23:48:42,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 43 states have internal predecessors, (54), 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) [2021-12-27 23:48:42,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2021-12-27 23:48:42,723 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 10 [2021-12-27 23:48:42,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:48:42,724 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2021-12-27 23:48:42,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:48:42,724 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2021-12-27 23:48:42,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-27 23:48:42,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:48:42,725 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:48:42,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-27 23:48:42,725 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:48:42,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:48:42,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1414194791, now seen corresponding path program 1 times [2021-12-27 23:48:42,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:48:42,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389756998] [2021-12-27 23:48:42,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:48:42,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:48:42,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:48:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-27 23:48:42,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:48:42,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389756998] [2021-12-27 23:48:42,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389756998] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:48:42,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671368588] [2021-12-27 23:48:42,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:48:42,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:48:42,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:48:42,828 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) [2021-12-27 23:48:42,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-27 23:48:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:48:42,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-27 23:48:42,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:48:43,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-12-27 23:48:43,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-12-27 23:48:43,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-27 23:48:43,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:48:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-27 23:48:43,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671368588] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 23:48:43,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 23:48:43,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2021-12-27 23:48:43,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000360678] [2021-12-27 23:48:43,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 23:48:43,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-27 23:48:43,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:48:43,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-27 23:48:43,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-27 23:48:43,139 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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) [2021-12-27 23:48:43,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:48:43,264 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2021-12-27 23:48:43,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-27 23:48:43,264 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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 18 [2021-12-27 23:48:43,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:48:43,266 INFO L225 Difference]: With dead ends: 50 [2021-12-27 23:48:43,268 INFO L226 Difference]: Without dead ends: 46 [2021-12-27 23:48:43,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-27 23:48:43,271 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 23:48:43,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 51 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 23:48:43,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-27 23:48:43,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2021-12-27 23:48:43,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 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) [2021-12-27 23:48:43,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-12-27 23:48:43,284 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 18 [2021-12-27 23:48:43,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:48:43,284 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-12-27 23:48:43,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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) [2021-12-27 23:48:43,284 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-12-27 23:48:43,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-27 23:48:43,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:48:43,285 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:48:43,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-27 23:48:43,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:48:43,502 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:48:43,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:48:43,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1635066921, now seen corresponding path program 1 times [2021-12-27 23:48:43,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:48:43,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935803940] [2021-12-27 23:48:43,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:48:43,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:48:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:48:43,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:48:43,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:48:43,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935803940] [2021-12-27 23:48:43,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935803940] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:48:43,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670286933] [2021-12-27 23:48:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:48:43,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:48:43,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:48:43,607 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) [2021-12-27 23:48:43,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-27 23:48:43,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:48:43,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-27 23:48:43,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:48:43,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-27 23:48:43,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-12-27 23:48:43,887 INFO L353 Elim1Store]: treesize reduction 56, result has 33.3 percent of original size [2021-12-27 23:48:43,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 78 [2021-12-27 23:48:43,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-12-27 23:48:43,900 INFO L353 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-27 23:48:43,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 15 treesize of output 15 [2021-12-27 23:48:43,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:48:43,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-12-27 23:48:43,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-12-27 23:48:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:48:43,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:48:44,018 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:48:44,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2021-12-27 23:48:44,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:48:44,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 334 treesize of output 225 [2021-12-27 23:48:44,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 192 [2021-12-27 23:48:44,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 188 [2021-12-27 23:48:44,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 180 [2021-12-27 23:48:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:48:44,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670286933] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 23:48:44,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 23:48:44,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-27 23:48:44,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035308455] [2021-12-27 23:48:44,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 23:48:44,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-27 23:48:44,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:48:44,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-27 23:48:44,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-27 23:48:44,297 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:48:44,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:48:44,552 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2021-12-27 23:48:44,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-27 23:48:44,552 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-27 23:48:44,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:48:44,553 INFO L225 Difference]: With dead ends: 79 [2021-12-27 23:48:44,553 INFO L226 Difference]: Without dead ends: 69 [2021-12-27 23:48:44,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-12-27 23:48:44,554 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 144 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 23:48:44,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 161 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 136 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2021-12-27 23:48:44,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-27 23:48:44,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 49. [2021-12-27 23:48:44,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 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) [2021-12-27 23:48:44,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2021-12-27 23:48:44,560 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 20 [2021-12-27 23:48:44,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:48:44,560 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2021-12-27 23:48:44,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:48:44,561 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2021-12-27 23:48:44,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-27 23:48:44,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:48:44,561 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:48:44,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-27 23:48:44,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:48:44,775 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:48:44,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:48:44,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1979842005, now seen corresponding path program 1 times [2021-12-27 23:48:44,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:48:44,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211345081] [2021-12-27 23:48:44,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:48:44,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:48:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:48:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 23:48:44,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:48:44,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211345081] [2021-12-27 23:48:44,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211345081] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:48:44,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:48:44,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 23:48:44,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683220712] [2021-12-27 23:48:44,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:48:44,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 23:48:44,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:48:44,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 23:48:44,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-27 23:48:44,831 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2021-12-27 23:48:44,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:48:44,941 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2021-12-27 23:48:44,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-27 23:48:44,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-27 23:48:44,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:48:44,942 INFO L225 Difference]: With dead ends: 64 [2021-12-27 23:48:44,942 INFO L226 Difference]: Without dead ends: 51 [2021-12-27 23:48:44,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-27 23:48:44,942 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 23:48:44,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 87 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 23:48:44,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-27 23:48:44,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-12-27 23:48:44,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 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) [2021-12-27 23:48:44,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2021-12-27 23:48:44,946 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 20 [2021-12-27 23:48:44,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:48:44,946 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2021-12-27 23:48:44,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2021-12-27 23:48:44,946 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2021-12-27 23:48:44,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-27 23:48:44,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:48:44,947 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:48:44,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-27 23:48:44,947 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:48:44,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:48:44,948 INFO L85 PathProgramCache]: Analyzing trace with hash 742290787, now seen corresponding path program 2 times [2021-12-27 23:48:44,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:48:44,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013108803] [2021-12-27 23:48:44,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:48:44,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:48:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:48:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:48:45,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:48:45,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013108803] [2021-12-27 23:48:45,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013108803] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:48:45,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691027460] [2021-12-27 23:48:45,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 23:48:45,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:48:45,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:48:45,108 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) [2021-12-27 23:48:45,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-27 23:48:45,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 23:48:45,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 23:48:45,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-27 23:48:45,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:48:45,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-27 23:48:45,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-27 23:48:45,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 23:48:45,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 44 [2021-12-27 23:48:45,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 40 [2021-12-27 23:48:45,443 INFO L353 Elim1Store]: treesize reduction 56, result has 33.3 percent of original size [2021-12-27 23:48:45,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 107 [2021-12-27 23:48:45,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 23:48:45,463 INFO L353 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2021-12-27 23:48:45,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 83 [2021-12-27 23:48:45,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 79 [2021-12-27 23:48:45,479 INFO L353 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-27 23:48:45,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-27 23:48:45,508 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:48:45,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-12-27 23:48:45,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:48:45,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-12-27 23:48:45,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 25 [2021-12-27 23:48:45,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-27 23:48:45,654 INFO L353 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-27 23:48:45,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-12-27 23:48:45,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-27 23:48:45,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 23:48:45,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-27 23:48:45,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-12-27 23:48:45,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-12-27 23:48:45,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-27 23:48:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:48:45,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:48:45,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-12-27 23:48:45,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2021-12-27 23:48:45,755 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_609 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_609) |c_ULTIMATE.start_main_~prev~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~prev~0#1.offset|)) 1)) is different from false [2021-12-27 23:48:45,773 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_608 Int) (v_ArrVal_609 (Array Int Int)) (v_ArrVal_606 Int)) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset| v_ArrVal_606) (+ |c_ULTIMATE.start_main_~x~0#1.offset| 4) v_ArrVal_608)) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_609) |c_ULTIMATE.start_main_~x~0#1.base|) (+ |c_ULTIMATE.start_main_~x~0#1.offset| 8)) 1)) is different from false [2021-12-27 23:48:45,780 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_608 Int) (v_ArrVal_609 (Array Int Int)) (v_ArrVal_606 Int)) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~head~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset| v_ArrVal_606) (+ |c_ULTIMATE.start_main_~head~0#1.offset| 4) v_ArrVal_608)) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) v_ArrVal_609) |c_ULTIMATE.start_main_~head~0#1.base|) (+ |c_ULTIMATE.start_main_~head~0#1.offset| 8)) 1)) is different from false [2021-12-27 23:48:45,790 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:48:45,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 93 [2021-12-27 23:48:45,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:48:45,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 728 treesize of output 575 [2021-12-27 23:48:45,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 558 treesize of output 534 [2021-12-27 23:48:45,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 534 treesize of output 526 [2021-12-27 23:48:45,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 264 treesize of output 260 [2021-12-27 23:48:47,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-27 23:48:47,638 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:48:47,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 67 [2021-12-27 23:48:49,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-27 23:48:49,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:48:49,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 41 [2021-12-27 23:48:49,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-27 23:48:49,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:48:49,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 41 [2021-12-27 23:48:49,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-27 23:48:49,789 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:48:49,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 41 [2021-12-27 23:48:51,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-27 23:48:51,390 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:48:51,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 41 [2021-12-27 23:48:51,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-27 23:48:51,714 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:48:51,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 67 [2021-12-27 23:48:52,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-27 23:48:52,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:48:52,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 41 [2021-12-27 23:48:53,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-27 23:48:53,924 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:48:53,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 41 [2021-12-27 23:48:54,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-27 23:48:54,225 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:48:54,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 67 [2021-12-27 23:48:54,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-27 23:48:54,789 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:48:54,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 41 [2021-12-27 23:48:54,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-27 23:48:54,906 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:48:54,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 41 [2021-12-27 23:48:55,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-27 23:48:55,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:48:55,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 41 [2021-12-27 23:48:55,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-27 23:48:55,812 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:48:55,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 67 [2021-12-27 23:48:57,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-27 23:48:57,628 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:48:57,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 67