./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/forester-heap/dll-circular-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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-circular-2.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 5b2cf85bdf3ceca18f859bba09ed8bf6de8160130db2f8571365ac2bc4f0e30c --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 13:37:52,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 13:37:52,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 13:37:52,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 13:37:52,189 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 13:37:52,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 13:37:52,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 13:37:52,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 13:37:52,196 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 13:37:52,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 13:37:52,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 13:37:52,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 13:37:52,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 13:37:52,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 13:37:52,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 13:37:52,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 13:37:52,209 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 13:37:52,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 13:37:52,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 13:37:52,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 13:37:52,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 13:37:52,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 13:37:52,218 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 13:37:52,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 13:37:52,223 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 13:37:52,223 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 13:37:52,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 13:37:52,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 13:37:52,225 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 13:37:52,225 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 13:37:52,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 13:37:52,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 13:37:52,227 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 13:37:52,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 13:37:52,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 13:37:52,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 13:37:52,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 13:37:52,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 13:37:52,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 13:37:52,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 13:37:52,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 13:37:52,233 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 13:37:52,258 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 13:37:52,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 13:37:52,258 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 13:37:52,259 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 13:37:52,259 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 13:37:52,259 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 13:37:52,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 13:37:52,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 13:37:52,260 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 13:37:52,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 13:37:52,261 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 13:37:52,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 13:37:52,261 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 13:37:52,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 13:37:52,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 13:37:52,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 13:37:52,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 13:37:52,262 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 13:37:52,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 13:37:52,262 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 13:37:52,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 13:37:52,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 13:37:52,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 13:37:52,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 13:37:52,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:37:52,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 13:37:52,263 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 13:37:52,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 13:37:52,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 13:37:52,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 13:37:52,264 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 13:37:52,264 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 13:37:52,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 13:37:52,265 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 13:37:52,265 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b2cf85bdf3ceca18f859bba09ed8bf6de8160130db2f8571365ac2bc4f0e30c [2021-12-14 13:37:52,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 13:37:52,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 13:37:52,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 13:37:52,484 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 13:37:52,484 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 13:37:52,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/dll-circular-2.i [2021-12-14 13:37:52,535 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b73026717/58f8435c90d84806a60b7f6d8f6989ea/FLAGccb440b68 [2021-12-14 13:37:52,952 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 13:37:52,953 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-circular-2.i [2021-12-14 13:37:52,962 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b73026717/58f8435c90d84806a60b7f6d8f6989ea/FLAGccb440b68 [2021-12-14 13:37:53,356 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b73026717/58f8435c90d84806a60b7f6d8f6989ea [2021-12-14 13:37:53,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 13:37:53,358 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 13:37:53,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 13:37:53,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 13:37:53,362 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 13:37:53,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:37:53" (1/1) ... [2021-12-14 13:37:53,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74a39ed2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:53, skipping insertion in model container [2021-12-14 13:37:53,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:37:53" (1/1) ... [2021-12-14 13:37:53,368 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 13:37:53,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 13:37:53,570 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-circular-2.i[22391,22404] [2021-12-14 13:37:53,573 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-circular-2.i[22497,22510] [2021-12-14 13:37:53,574 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-circular-2.i[22622,22635] [2021-12-14 13:37:53,576 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:37:53,581 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 13:37:53,622 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-circular-2.i[22391,22404] [2021-12-14 13:37:53,623 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-circular-2.i[22497,22510] [2021-12-14 13:37:53,624 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-circular-2.i[22622,22635] [2021-12-14 13:37:53,640 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:37:53,657 INFO L208 MainTranslator]: Completed translation [2021-12-14 13:37:53,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:53 WrapperNode [2021-12-14 13:37:53,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 13:37:53,660 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 13:37:53,660 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 13:37:53,660 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 13:37:53,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:53" (1/1) ... [2021-12-14 13:37:53,682 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:53" (1/1) ... [2021-12-14 13:37:53,697 INFO L137 Inliner]: procedures = 119, calls = 31, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 117 [2021-12-14 13:37:53,697 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 13:37:53,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 13:37:53,697 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 13:37:53,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 13:37:53,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:53" (1/1) ... [2021-12-14 13:37:53,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:53" (1/1) ... [2021-12-14 13:37:53,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:53" (1/1) ... [2021-12-14 13:37:53,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:53" (1/1) ... [2021-12-14 13:37:53,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:53" (1/1) ... [2021-12-14 13:37:53,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:53" (1/1) ... [2021-12-14 13:37:53,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:53" (1/1) ... [2021-12-14 13:37:53,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 13:37:53,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 13:37:53,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 13:37:53,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 13:37:53,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:53" (1/1) ... [2021-12-14 13:37:53,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:37:53,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:37:53,808 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) [2021-12-14 13:37:53,830 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 [2021-12-14 13:37:53,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 13:37:53,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 13:37:53,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 13:37:53,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 13:37:53,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 13:37:53,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 13:37:53,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 13:37:53,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 13:37:53,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 13:37:53,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 13:37:53,995 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 13:37:53,996 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 13:37:54,130 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 13:37:54,134 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 13:37:54,134 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-14 13:37:54,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:37:54 BoogieIcfgContainer [2021-12-14 13:37:54,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 13:37:54,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 13:37:54,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 13:37:54,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 13:37:54,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:37:53" (1/3) ... [2021-12-14 13:37:54,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5984d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:37:54, skipping insertion in model container [2021-12-14 13:37:54,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:53" (2/3) ... [2021-12-14 13:37:54,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5984d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:37:54, skipping insertion in model container [2021-12-14 13:37:54,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:37:54" (3/3) ... [2021-12-14 13:37:54,146 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-circular-2.i [2021-12-14 13:37:54,149 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 13:37:54,150 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-12-14 13:37:54,180 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 13:37:54,185 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 [2021-12-14 13:37:54,186 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-14 13:37:54,195 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:37:54,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-14 13:37:54,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:37:54,199 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-14 13:37:54,200 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:37:54,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:37:54,208 INFO L85 PathProgramCache]: Analyzing trace with hash 890892102, now seen corresponding path program 1 times [2021-12-14 13:37:54,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:37:54,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019364452] [2021-12-14 13:37:54,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:37:54,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:37:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:37:54,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:37:54,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019364452] [2021-12-14 13:37:54,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019364452] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:37:54,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:37:54,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 13:37:54,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549706777] [2021-12-14 13:37:54,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:37:54,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 13:37:54,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:37:54,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 13:37:54,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 13:37:54,407 INFO L87 Difference]: Start difference. First operand has 33 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:37:54,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:37:54,421 INFO L93 Difference]: Finished difference Result 64 states and 100 transitions. [2021-12-14 13:37:54,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 13:37:54,423 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-14 13:37:54,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:37:54,428 INFO L225 Difference]: With dead ends: 64 [2021-12-14 13:37:54,428 INFO L226 Difference]: Without dead ends: 26 [2021-12-14 13:37:54,430 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 [2021-12-14 13:37:54,433 INFO L933 BasicCegarLoop]: 39 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, 39 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 [2021-12-14 13:37:54,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:37:54,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-14 13:37:54,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-14 13:37:54,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:37:54,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-12-14 13:37:54,458 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 6 [2021-12-14 13:37:54,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:37:54,458 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-12-14 13:37:54,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:37:54,458 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-12-14 13:37:54,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-14 13:37:54,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:37:54,459 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:37:54,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 13:37:54,460 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:37:54,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:37:54,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1806883023, now seen corresponding path program 1 times [2021-12-14 13:37:54,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:37:54,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820281023] [2021-12-14 13:37:54,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:37:54,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:37:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:37:54,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:37:54,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820281023] [2021-12-14 13:37:54,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820281023] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:37:54,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:37:54,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 13:37:54,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143762351] [2021-12-14 13:37:54,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:37:54,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 13:37:54,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:37:54,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 13:37:54,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 13:37:54,597 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2021-12-14 13:37:54,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:37:54,640 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-12-14 13:37:54,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 13:37:54,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 [2021-12-14 13:37:54,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:37:54,641 INFO L225 Difference]: With dead ends: 42 [2021-12-14 13:37:54,641 INFO L226 Difference]: Without dead ends: 38 [2021-12-14 13:37:54,642 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 [2021-12-14 13:37:54,642 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:37:54,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 47 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:37:54,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-14 13:37:54,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2021-12-14 13:37:54,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 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) [2021-12-14 13:37:54,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-12-14 13:37:54,647 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 7 [2021-12-14 13:37:54,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:37:54,647 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-12-14 13:37:54,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2021-12-14 13:37:54,648 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-12-14 13:37:54,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-14 13:37:54,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:37:54,648 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:37:54,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 13:37:54,649 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:37:54,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:37:54,649 INFO L85 PathProgramCache]: Analyzing trace with hash 706691337, now seen corresponding path program 1 times [2021-12-14 13:37:54,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:37:54,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47103329] [2021-12-14 13:37:54,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:37:54,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:37:54,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:37:54,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:37:54,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47103329] [2021-12-14 13:37:54,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47103329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:37:54,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:37:54,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 13:37:54,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262269658] [2021-12-14 13:37:54,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:37:54,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 13:37:54,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:37:54,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 13:37:54,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 13:37:54,691 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2021-12-14 13:37:54,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:37:54,703 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2021-12-14 13:37:54,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 13:37:54,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 [2021-12-14 13:37:54,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:37:54,705 INFO L225 Difference]: With dead ends: 71 [2021-12-14 13:37:54,705 INFO L226 Difference]: Without dead ends: 49 [2021-12-14 13:37:54,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 13:37:54,707 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:37:54,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 48 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:37:54,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-14 13:37:54,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2021-12-14 13:37:54,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.303030303030303) internal successors, (43), 34 states have internal predecessors, (43), 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) [2021-12-14 13:37:54,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2021-12-14 13:37:54,711 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 10 [2021-12-14 13:37:54,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:37:54,712 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2021-12-14 13:37:54,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2021-12-14 13:37:54,712 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2021-12-14 13:37:54,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-14 13:37:54,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:37:54,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:37:54,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 13:37:54,713 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:37:54,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:37:54,713 INFO L85 PathProgramCache]: Analyzing trace with hash -84804677, now seen corresponding path program 1 times [2021-12-14 13:37:54,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:37:54,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185329637] [2021-12-14 13:37:54,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:37:54,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:37:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:37:54,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:37:54,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185329637] [2021-12-14 13:37:54,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185329637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:37:54,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:37:54,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 13:37:54,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076954288] [2021-12-14 13:37:54,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:37:54,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 13:37:54,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:37:54,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 13:37:54,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 13:37:54,737 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2021-12-14 13:37:54,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:37:54,747 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2021-12-14 13:37:54,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 13:37:54,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 13 [2021-12-14 13:37:54,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:37:54,748 INFO L225 Difference]: With dead ends: 38 [2021-12-14 13:37:54,748 INFO L226 Difference]: Without dead ends: 36 [2021-12-14 13:37:54,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 13:37:54,749 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:37:54,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:37:54,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-14 13:37:54,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-12-14 13:37:54,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 35 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) [2021-12-14 13:37:54,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2021-12-14 13:37:54,753 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 13 [2021-12-14 13:37:54,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:37:54,754 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2021-12-14 13:37:54,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2021-12-14 13:37:54,754 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2021-12-14 13:37:54,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-14 13:37:54,755 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:37:54,755 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:37:54,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 13:37:54,755 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:37:54,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:37:54,756 INFO L85 PathProgramCache]: Analyzing trace with hash -84802755, now seen corresponding path program 1 times [2021-12-14 13:37:54,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:37:54,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291329481] [2021-12-14 13:37:54,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:37:54,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:37:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:54,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:37:54,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:37:54,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291329481] [2021-12-14 13:37:54,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291329481] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:37:54,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:37:54,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 13:37:54,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113236033] [2021-12-14 13:37:54,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:37:54,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 13:37:54,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:37:54,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 13:37:54,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 13:37:54,907 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2021-12-14 13:37:55,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:37:55,025 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2021-12-14 13:37:55,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 13:37:55,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 13 [2021-12-14 13:37:55,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:37:55,027 INFO L225 Difference]: With dead ends: 47 [2021-12-14 13:37:55,027 INFO L226 Difference]: Without dead ends: 34 [2021-12-14 13:37:55,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 13:37:55,028 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:37:55,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 68 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:37:55,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-14 13:37:55,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-14 13:37:55,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.28125) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:37:55,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-12-14 13:37:55,032 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 13 [2021-12-14 13:37:55,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:37:55,033 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-12-14 13:37:55,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2021-12-14 13:37:55,033 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-12-14 13:37:55,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-14 13:37:55,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:37:55,034 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:37:55,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 13:37:55,034 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:37:55,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:37:55,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1783178116, now seen corresponding path program 1 times [2021-12-14 13:37:55,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:37:55,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643494447] [2021-12-14 13:37:55,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:37:55,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:37:55,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:37:55,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:37:55,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643494447] [2021-12-14 13:37:55,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643494447] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:37:55,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315504786] [2021-12-14 13:37:55,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:37:55,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:37:55,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:37:55,132 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) [2021-12-14 13:37:55,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 13:37:55,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:55,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-14 13:37:55,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:37:55,283 INFO L388 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 [2021-12-14 13:37:55,363 INFO L388 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 36 treesize of output 27 [2021-12-14 13:37:55,378 INFO L354 Elim1Store]: treesize reduction 50, result has 9.1 percent of original size [2021-12-14 13:37:55,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 53 [2021-12-14 13:37:55,383 INFO L388 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 30 treesize of output 28 [2021-12-14 13:37:55,390 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-14 13:37:55,390 INFO L388 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 [2021-12-14 13:37:55,434 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 13:37:55,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 30 treesize of output 28 [2021-12-14 13:37:55,495 INFO L388 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 47 treesize of output 27 [2021-12-14 13:37:55,507 INFO L388 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 18 treesize of output 16 [2021-12-14 13:37:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:37:55,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:37:55,540 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_322 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_322) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0))) is different from false [2021-12-14 13:37:55,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:37:55,599 INFO L388 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 [2021-12-14 13:37:55,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:37:55,607 INFO L388 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 [2021-12-14 13:37:55,613 INFO L388 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 196 [2021-12-14 13:37:55,619 INFO L388 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 196 treesize of output 184 [2021-12-14 13:37:55,624 INFO L388 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 184 treesize of output 180 [2021-12-14 13:37:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-14 13:37:55,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315504786] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:37:55,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:37:55,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-14 13:37:55,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331338425] [2021-12-14 13:37:55,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:37:55,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 13:37:55,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:37:55,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 13:37:55,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=40, Unknown=1, NotChecked=12, Total=72 [2021-12-14 13:37:55,753 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 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) [2021-12-14 13:37:55,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:37:55,810 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2021-12-14 13:37:55,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 13:37:55,810 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 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 13 [2021-12-14 13:37:55,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:37:55,811 INFO L225 Difference]: With dead ends: 61 [2021-12-14 13:37:55,811 INFO L226 Difference]: Without dead ends: 59 [2021-12-14 13:37:55,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=50, Unknown=1, NotChecked=14, Total=90 [2021-12-14 13:37:55,812 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 30 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:37:55,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 109 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 58 Unchecked, 0.0s Time] [2021-12-14 13:37:55,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-14 13:37:55,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2021-12-14 13:37:55,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:37:55,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2021-12-14 13:37:55,816 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 13 [2021-12-14 13:37:55,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:37:55,817 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2021-12-14 13:37:55,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 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) [2021-12-14 13:37:55,817 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2021-12-14 13:37:55,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 13:37:55,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:37:55,818 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:37:55,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 13:37:56,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-14 13:37:56,035 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:37:56,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:37:56,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1644077251, now seen corresponding path program 1 times [2021-12-14 13:37:56,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:37:56,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765425298] [2021-12-14 13:37:56,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:37:56,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:37:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:37:56,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:37:56,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765425298] [2021-12-14 13:37:56,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765425298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:37:56,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:37:56,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 13:37:56,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433066485] [2021-12-14 13:37:56,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:37:56,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 13:37:56,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:37:56,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 13:37:56,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 13:37:56,088 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:37:56,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:37:56,105 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2021-12-14 13:37:56,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 13:37:56,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-14 13:37:56,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:37:56,107 INFO L225 Difference]: With dead ends: 96 [2021-12-14 13:37:56,107 INFO L226 Difference]: Without dead ends: 73 [2021-12-14 13:37:56,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 13:37:56,108 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 17 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:37:56,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 70 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:37:56,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-14 13:37:56,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 56. [2021-12-14 13:37:56,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 55 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:37:56,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2021-12-14 13:37:56,125 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 17 [2021-12-14 13:37:56,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:37:56,125 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2021-12-14 13:37:56,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:37:56,125 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2021-12-14 13:37:56,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 13:37:56,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:37:56,126 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:37:56,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 13:37:56,126 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:37:56,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:37:56,127 INFO L85 PathProgramCache]: Analyzing trace with hash 619754034, now seen corresponding path program 1 times [2021-12-14 13:37:56,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:37:56,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346451107] [2021-12-14 13:37:56,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:37:56,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:37:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:37:56,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:37:56,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346451107] [2021-12-14 13:37:56,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346451107] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:37:56,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595448587] [2021-12-14 13:37:56,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:37:56,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:37:56,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:37:56,255 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) [2021-12-14 13:37:56,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 13:37:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:56,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-14 13:37:56,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:37:56,358 INFO L388 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 [2021-12-14 13:37:56,363 INFO L388 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 [2021-12-14 13:37:56,432 INFO L354 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2021-12-14 13:37:56,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 131 treesize of output 102 [2021-12-14 13:37:56,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:37:56,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 13:37:56,444 INFO L388 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 39 treesize of output 30 [2021-12-14 13:37:56,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:37:56,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:37:56,478 INFO L354 Elim1Store]: treesize reduction 125, result has 11.3 percent of original size [2021-12-14 13:37:56,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 96 treesize of output 93 [2021-12-14 13:37:56,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:37:56,489 INFO L388 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 27 treesize of output 29 [2021-12-14 13:37:56,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:37:56,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:37:56,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:37:56,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 13:37:56,500 INFO L388 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 27 treesize of output 24 [2021-12-14 13:37:56,508 INFO L388 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 8 treesize of output 7 [2021-12-14 13:37:56,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:37:56,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:37:56,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 13:37:56,518 INFO L388 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 19 treesize of output 18 [2021-12-14 13:37:56,525 INFO L388 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 8 treesize of output 7 [2021-12-14 13:37:56,535 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 13:37:56,535 INFO L388 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 11 treesize of output 11 [2021-12-14 13:37:56,543 INFO L388 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-14 13:37:56,550 INFO L388 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 8 treesize of output 7 [2021-12-14 13:37:56,555 INFO L388 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 8 treesize of output 7 [2021-12-14 13:37:56,566 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-14 13:37:56,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:37:56,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-14 13:37:56,583 INFO L388 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 5 treesize of output 3 [2021-12-14 13:37:56,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:37:56,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-14 13:37:56,595 INFO L388 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 5 treesize of output 3 [2021-12-14 13:37:56,688 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 13:37:56,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 16 treesize of output 22 [2021-12-14 13:37:56,696 INFO L388 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 7 treesize of output 3 [2021-12-14 13:37:56,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:37:56,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:37:56,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 13:37:56,710 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-14 13:37:56,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 41 [2021-12-14 13:37:56,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:37:56,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-12-14 13:37:56,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:37:56,815 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-14 13:37:56,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 76 [2021-12-14 13:37:56,825 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-12-14 13:37:56,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 55 [2021-12-14 13:37:56,829 INFO L388 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 [2021-12-14 13:37:56,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 13:37:56,946 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-12-14 13:37:56,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 57 [2021-12-14 13:37:56,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 13:37:56,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2021-12-14 13:37:56,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:37:56,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:37:56,989 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_639 (Array Int Int)) (v_ArrVal_636 Int) (v_ArrVal_635 Int)) (= 0 (let ((.cse4 (+ 8 |c_ULTIMATE.start_main_~x~0#1.offset|))) (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base|) .cse4 v_ArrVal_636))) (.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) .cse4 v_ArrVal_635)))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (.cse2 (select (select .cse3 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_639) (select (select .cse0 .cse1) .cse2)) (+ (select (select .cse3 .cse1) .cse2) 8))))))) is different from false [2021-12-14 13:37:57,144 INFO L354 Elim1Store]: treesize reduction 13, result has 69.0 percent of original size [2021-12-14 13:37:57,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 2303 treesize of output 1827 [2021-12-14 13:37:57,316 INFO L354 Elim1Store]: treesize reduction 27, result has 64.9 percent of original size [2021-12-14 13:37:57,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 6612 treesize of output 4633 [2021-12-14 13:38:00,404 INFO L354 Elim1Store]: treesize reduction 371, result has 64.4 percent of original size [2021-12-14 13:38:00,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 12 new quantified variables, introduced 36 case distinctions, treesize of input 186750 treesize of output 168719 [2021-12-14 13:38:14,609 WARN L227 SmtUtils]: Spent 12.14s on a formula simplification. DAG size of input: 314 DAG size of output: 290 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-14 13:38:14,610 INFO L354 Elim1Store]: treesize reduction 180, result has 86.1 percent of original size [2021-12-14 13:38:14,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 14 new quantified variables, introduced 66 case distinctions, treesize of input 4910520 treesize of output 4578998 [2021-12-14 13:38:35,854 WARN L227 SmtUtils]: Spent 21.21s on a formula simplification. DAG size of input: 16279 DAG size of output: 16279 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)