./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array1_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3dbbec33 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/array-patterns/array1_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f9fbee177c3231db1a1e3277e649158ac81edd180968ad454e1d0751d0f1d4e9 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 10:08:42,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 10:08:42,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 10:08:42,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 10:08:42,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 10:08:42,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 10:08:42,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 10:08:42,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 10:08:42,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 10:08:42,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 10:08:42,583 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 10:08:42,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 10:08:42,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 10:08:42,588 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 10:08:42,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 10:08:42,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 10:08:42,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 10:08:42,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 10:08:42,594 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 10:08:42,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 10:08:42,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 10:08:42,601 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 10:08:42,602 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 10:08:42,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 10:08:42,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 10:08:42,620 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 10:08:42,621 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 10:08:42,621 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 10:08:42,622 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 10:08:42,622 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 10:08:42,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 10:08:42,623 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 10:08:42,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 10:08:42,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 10:08:42,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 10:08:42,624 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 10:08:42,625 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 10:08:42,625 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 10:08:42,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 10:08:42,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 10:08:42,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 10:08:42,627 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 10:08:42,648 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 10:08:42,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 10:08:42,648 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 10:08:42,649 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 10:08:42,649 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 10:08:42,649 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 10:08:42,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 10:08:42,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 10:08:42,650 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 10:08:42,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 10:08:42,651 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 10:08:42,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 10:08:42,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 10:08:42,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 10:08:42,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 10:08:42,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 10:08:42,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 10:08:42,652 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 10:08:42,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 10:08:42,652 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 10:08:42,652 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 10:08:42,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 10:08:42,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 10:08:42,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 10:08:42,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 10:08:42,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 10:08:42,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 10:08:42,653 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 10:08:42,654 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 10:08:42,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 10:08:42,654 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 10:08:42,654 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 10:08:42,654 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 10:08:42,655 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 10:08:42,655 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 10:08:42,655 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9fbee177c3231db1a1e3277e649158ac81edd180968ad454e1d0751d0f1d4e9 [2023-02-14 10:08:42,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 10:08:42,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 10:08:42,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 10:08:42,832 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 10:08:42,849 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 10:08:42,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array1_pattern.c [2023-02-14 10:08:43,814 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 10:08:43,927 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 10:08:43,927 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array1_pattern.c [2023-02-14 10:08:43,931 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70778fb2b/67fe77c959f94256aa7aaa21cc85dc24/FLAG779457ac9 [2023-02-14 10:08:43,945 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70778fb2b/67fe77c959f94256aa7aaa21cc85dc24 [2023-02-14 10:08:43,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 10:08:43,948 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 10:08:43,950 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 10:08:43,950 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 10:08:43,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 10:08:43,953 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:08:43" (1/1) ... [2023-02-14 10:08:43,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3252eba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:43, skipping insertion in model container [2023-02-14 10:08:43,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:08:43" (1/1) ... [2023-02-14 10:08:43,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 10:08:43,975 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 10:08:44,089 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array1_pattern.c[1307,1320] [2023-02-14 10:08:44,103 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 10:08:44,110 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 10:08:44,120 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array1_pattern.c[1307,1320] [2023-02-14 10:08:44,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 10:08:44,145 INFO L208 MainTranslator]: Completed translation [2023-02-14 10:08:44,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:44 WrapperNode [2023-02-14 10:08:44,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 10:08:44,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 10:08:44,147 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 10:08:44,147 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 10:08:44,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:44" (1/1) ... [2023-02-14 10:08:44,162 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:44" (1/1) ... [2023-02-14 10:08:44,178 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 76 [2023-02-14 10:08:44,179 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 10:08:44,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 10:08:44,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 10:08:44,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 10:08:44,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:44" (1/1) ... [2023-02-14 10:08:44,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:44" (1/1) ... [2023-02-14 10:08:44,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:44" (1/1) ... [2023-02-14 10:08:44,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:44" (1/1) ... [2023-02-14 10:08:44,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:44" (1/1) ... [2023-02-14 10:08:44,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:44" (1/1) ... [2023-02-14 10:08:44,206 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:44" (1/1) ... [2023-02-14 10:08:44,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:44" (1/1) ... [2023-02-14 10:08:44,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 10:08:44,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 10:08:44,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 10:08:44,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 10:08:44,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:44" (1/1) ... [2023-02-14 10:08:44,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 10:08:44,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:08:44,232 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) [2023-02-14 10:08:44,245 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 [2023-02-14 10:08:44,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 10:08:44,258 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-14 10:08:44,258 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-14 10:08:44,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 10:08:44,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-14 10:08:44,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 10:08:44,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 10:08:44,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 10:08:44,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 10:08:44,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 10:08:44,300 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 10:08:44,302 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 10:08:44,402 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 10:08:44,417 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 10:08:44,417 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-14 10:08:44,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:08:44 BoogieIcfgContainer [2023-02-14 10:08:44,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 10:08:44,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 10:08:44,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 10:08:44,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 10:08:44,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:08:43" (1/3) ... [2023-02-14 10:08:44,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3977cc59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:08:44, skipping insertion in model container [2023-02-14 10:08:44,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:08:44" (2/3) ... [2023-02-14 10:08:44,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3977cc59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:08:44, skipping insertion in model container [2023-02-14 10:08:44,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:08:44" (3/3) ... [2023-02-14 10:08:44,425 INFO L112 eAbstractionObserver]: Analyzing ICFG array1_pattern.c [2023-02-14 10:08:44,436 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 10:08:44,436 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 10:08:44,473 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 10:08:44,477 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1a31f620, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 10:08:44,478 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 10:08:44,480 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:08:44,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-14 10:08:44,485 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:08:44,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:08:44,486 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:08:44,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:08:44,490 INFO L85 PathProgramCache]: Analyzing trace with hash -800294020, now seen corresponding path program 1 times [2023-02-14 10:08:44,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:08:44,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777087874] [2023-02-14 10:08:44,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:08:44,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:08:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:08:44,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:08:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:08:44,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:08:44,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:08:44,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777087874] [2023-02-14 10:08:44,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777087874] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:08:44,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:08:44,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 10:08:44,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542411731] [2023-02-14 10:08:44,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:08:44,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 10:08:44,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:08:44,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 10:08:44,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 10:08:44,659 INFO L87 Difference]: Start difference. First operand has 25 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 10:08:44,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:08:44,674 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2023-02-14 10:08:44,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 10:08:44,676 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-02-14 10:08:44,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:08:44,680 INFO L225 Difference]: With dead ends: 47 [2023-02-14 10:08:44,680 INFO L226 Difference]: Without dead ends: 21 [2023-02-14 10:08:44,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 10:08:44,685 INFO L413 NwaCegarLoop]: 28 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, 28 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 [2023-02-14 10:08:44,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:08:44,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-14 10:08:44,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-02-14 10:08:44,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:08:44,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-02-14 10:08:44,709 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2023-02-14 10:08:44,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:08:44,709 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-02-14 10:08:44,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 10:08:44,710 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-02-14 10:08:44,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-14 10:08:44,711 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:08:44,711 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:08:44,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 10:08:44,712 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:08:44,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:08:44,712 INFO L85 PathProgramCache]: Analyzing trace with hash -952637313, now seen corresponding path program 1 times [2023-02-14 10:08:44,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:08:44,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136864164] [2023-02-14 10:08:44,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:08:44,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:08:44,750 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:08:44,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607798670] [2023-02-14 10:08:44,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:08:44,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:08:44,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:08:44,766 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) [2023-02-14 10:08:44,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 10:08:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:08:44,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 10:08:44,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:08:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 10:08:44,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 10:08:44,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:08:44,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136864164] [2023-02-14 10:08:44,940 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:08:44,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607798670] [2023-02-14 10:08:44,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607798670] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:08:44,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:08:44,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 10:08:44,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776330047] [2023-02-14 10:08:44,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:08:44,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 10:08:44,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:08:44,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 10:08:44,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 10:08:44,945 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:08:44,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:08:44,972 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2023-02-14 10:08:44,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 10:08:44,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-02-14 10:08:44,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:08:44,976 INFO L225 Difference]: With dead ends: 26 [2023-02-14 10:08:44,976 INFO L226 Difference]: Without dead ends: 22 [2023-02-14 10:08:44,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 10:08:44,977 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:08:44,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 54 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:08:44,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-14 10:08:44,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-14 10:08:44,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:08:44,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-02-14 10:08:44,983 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 22 [2023-02-14 10:08:44,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:08:44,983 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-02-14 10:08:44,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:08:44,984 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-02-14 10:08:44,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 10:08:44,984 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:08:44,985 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:08:44,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 10:08:45,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:08:45,190 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:08:45,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:08:45,190 INFO L85 PathProgramCache]: Analyzing trace with hash -603190335, now seen corresponding path program 1 times [2023-02-14 10:08:45,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:08:45,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331895077] [2023-02-14 10:08:45,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:08:45,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:08:45,224 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:08:45,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [957028885] [2023-02-14 10:08:45,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:08:45,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:08:45,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:08:45,227 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) [2023-02-14 10:08:45,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 10:08:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:08:45,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 10:08:45,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:08:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:08:45,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 10:08:45,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:08:45,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331895077] [2023-02-14 10:08:45,366 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:08:45,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957028885] [2023-02-14 10:08:45,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957028885] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:08:45,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:08:45,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 10:08:45,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978680433] [2023-02-14 10:08:45,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:08:45,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 10:08:45,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:08:45,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 10:08:45,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 10:08:45,369 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:08:45,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:08:45,413 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2023-02-14 10:08:45,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 10:08:45,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-02-14 10:08:45,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:08:45,415 INFO L225 Difference]: With dead ends: 41 [2023-02-14 10:08:45,415 INFO L226 Difference]: Without dead ends: 25 [2023-02-14 10:08:45,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-14 10:08:45,417 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:08:45,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 68 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:08:45,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-14 10:08:45,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-02-14 10:08:45,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:08:45,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-02-14 10:08:45,425 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 24 [2023-02-14 10:08:45,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:08:45,426 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-02-14 10:08:45,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:08:45,426 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-02-14 10:08:45,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-14 10:08:45,427 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:08:45,427 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:08:45,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 10:08:45,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-14 10:08:45,632 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:08:45,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:08:45,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1366149955, now seen corresponding path program 1 times [2023-02-14 10:08:45,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:08:45,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338205977] [2023-02-14 10:08:45,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:08:45,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:08:45,647 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:08:45,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353648477] [2023-02-14 10:08:45,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:08:45,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:08:45,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:08:45,648 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:08:45,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 10:08:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:08:45,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-14 10:08:45,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:08:45,740 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 8 [2023-02-14 10:08:45,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:08:45,775 INFO L350 Elim1Store]: Elim1 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 18 [2023-02-14 10:08:45,778 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-14 10:08:46,033 INFO L350 Elim1Store]: Elim1 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 117 treesize of output 95 [2023-02-14 10:08:46,047 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 92 treesize of output 88 [2023-02-14 10:08:46,064 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:08:46,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:08:46,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 150 [2023-02-14 10:08:46,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 101 treesize of output 9 [2023-02-14 10:08:46,248 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 10:08:46,253 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-02-14 10:08:46,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 17 [2023-02-14 10:08:46,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:08:46,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:08:48,366 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse10 (mod (+ c_~ARR_SIZE~0 4294967295 (* 4294967295 |c_ULTIMATE.start_main_~index~0#1|)) 4294967296))) (let ((.cse7 (<= .cse10 2147483647)) (.cse2 (* 4 .cse10)) (.cse3 (* |c_ULTIMATE.start_main_~index~0#1| |c_ULTIMATE.start_main_~num~0#1|)) (.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|)) (.cse5 (* |c_ULTIMATE.start_main_~index~0#1| 4)) (.cse6 (* |c_ULTIMATE.start_main_~index~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|))) (and (or (forall ((|ULTIMATE.start_main_~#array1~0#1.offset| Int)) (= (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse4 (+ |ULTIMATE.start_main_~#array1~0#1.offset| .cse5) .cse6)))) (let ((.cse0 (store (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ (- 17179869184) .cse2 |c_ULTIMATE.start_main_~#array2~0#1.offset|) .cse3))) (+ (select .cse0 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select (select (store .cse1 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse0) |c_ULTIMATE.start_main_~#array1~0#1.base|) |ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|))) 0)) .cse7) (or (not .cse7) (forall ((|ULTIMATE.start_main_~#array1~0#1.offset| Int)) (= (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse4 (+ |ULTIMATE.start_main_~#array1~0#1.offset| .cse5) .cse6)))) (let ((.cse9 (store (select .cse8 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ .cse2 |c_ULTIMATE.start_main_~#array2~0#1.offset|) .cse3))) (+ |c_ULTIMATE.start_main_~sum~0#1| (select (select (store .cse8 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse9) |c_ULTIMATE.start_main_~#array1~0#1.base|) |ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse9 |c_ULTIMATE.start_main_~#array2~0#1.offset|)))) 0)))))) is different from false [2023-02-14 10:08:54,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:08:54,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338205977] [2023-02-14 10:08:54,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:08:54,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353648477] [2023-02-14 10:08:54,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353648477] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:08:54,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:08:54,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-02-14 10:08:54,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866960293] [2023-02-14 10:08:54,690 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 10:08:54,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-14 10:08:54,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:08:54,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-14 10:08:54,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=350, Unknown=2, NotChecked=38, Total=462 [2023-02-14 10:08:54,691 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 14 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:08:55,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:08:55,668 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2023-02-14 10:08:55,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-14 10:08:55,668 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 14 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-02-14 10:08:55,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:08:55,670 INFO L225 Difference]: With dead ends: 56 [2023-02-14 10:08:55,670 INFO L226 Difference]: Without dead ends: 52 [2023-02-14 10:08:55,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=205, Invalid=853, Unknown=2, NotChecked=62, Total=1122 [2023-02-14 10:08:55,673 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 72 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 10:08:55,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 106 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 10:08:55,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-14 10:08:55,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2023-02-14 10:08:55,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 10:08:55,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2023-02-14 10:08:55,693 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 26 [2023-02-14 10:08:55,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:08:55,693 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2023-02-14 10:08:55,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 14 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:08:55,693 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2023-02-14 10:08:55,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 10:08:55,694 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:08:55,694 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:08:55,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 10:08:55,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:08:55,896 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:08:55,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:08:55,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1336652411, now seen corresponding path program 2 times [2023-02-14 10:08:55,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:08:55,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023380604] [2023-02-14 10:08:55,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:08:55,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:08:55,913 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:08:55,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [482254475] [2023-02-14 10:08:55,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 10:08:55,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:08:55,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:08:55,916 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:08:55,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 10:08:55,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 10:08:55,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:08:55,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 10:08:55,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:08:56,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:08:56,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:08:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 10:08:56,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:08:56,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023380604] [2023-02-14 10:08:56,049 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 10:08:56,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482254475] [2023-02-14 10:08:56,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482254475] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:08:56,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:08:56,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-14 10:08:56,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143137524] [2023-02-14 10:08:56,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 10:08:56,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 10:08:56,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:08:56,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 10:08:56,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-14 10:08:56,051 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 10:08:56,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:08:56,120 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2023-02-14 10:08:56,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 10:08:56,120 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2023-02-14 10:08:56,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:08:56,122 INFO L225 Difference]: With dead ends: 55 [2023-02-14 10:08:56,122 INFO L226 Difference]: Without dead ends: 37 [2023-02-14 10:08:56,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-02-14 10:08:56,124 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:08:56,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 95 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:08:56,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-14 10:08:56,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2023-02-14 10:08:56,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 10:08:56,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-02-14 10:08:56,131 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 28 [2023-02-14 10:08:56,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:08:56,132 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-02-14 10:08:56,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 10:08:56,133 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-02-14 10:08:56,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 10:08:56,133 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:08:56,134 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:08:56,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 10:08:56,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:08:56,338 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:08:56,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:08:56,339 INFO L85 PathProgramCache]: Analyzing trace with hash -178408891, now seen corresponding path program 3 times [2023-02-14 10:08:56,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:08:56,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081500175] [2023-02-14 10:08:56,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:08:56,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:08:56,354 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 10:08:56,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634335318] [2023-02-14 10:08:56,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 10:08:56,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:08:56,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:08:56,386 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:08:56,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 10:08:56,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-14 10:08:56,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:08:56,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-14 10:08:56,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:08:56,475 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 8 [2023-02-14 10:08:56,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 10:08:56,602 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 86 treesize of output 87 [2023-02-14 10:08:56,606 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 86 treesize of output 84 [2023-02-14 10:08:56,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 131 [2023-02-14 10:08:56,617 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2023-02-14 10:08:56,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 84 treesize of output 5 [2023-02-14 10:08:56,956 INFO L321 Elim1Store]: treesize reduction 21, result has 72.7 percent of original size [2023-02-14 10:08:56,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 127 treesize of output 119 [2023-02-14 10:09:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 10:09:01,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:09:01,818 INFO L321 Elim1Store]: treesize reduction 20, result has 64.3 percent of original size [2023-02-14 10:09:01,818 INFO L350 Elim1Store]: Elim1 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 161 treesize of output 177 [2023-02-14 10:09:01,830 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:09:01,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 126 treesize of output 193 [2023-02-14 10:09:01,849 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:09:01,849 INFO L350 Elim1Store]: Elim1 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 59 treesize of output 61 [2023-02-14 10:09:03,407 INFO L321 Elim1Store]: treesize reduction 224, result has 42.0 percent of original size [2023-02-14 10:09:03,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 444 treesize of output 522 [2023-02-14 10:09:18,937 WARN L233 SmtUtils]: Spent 14.37s on a formula simplification that was a NOOP. DAG size: 258 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-02-14 10:09:18,938 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 10:09:18,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 1129 treesize of output 1628