./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_two_index_01.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_two_index_01.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 49688e6ac5964d079e81b93cbef6c2e6f5f14699441dc6a4423fa686d49b3f7f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 09:50:07,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 09:50:07,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 09:50:07,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 09:50:07,252 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 09:50:07,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 09:50:07,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 09:50:07,256 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 09:50:07,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 09:50:07,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 09:50:07,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 09:50:07,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 09:50:07,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 09:50:07,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 09:50:07,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 09:50:07,268 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 09:50:07,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 09:50:07,271 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 09:50:07,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 09:50:07,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 09:50:07,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 09:50:07,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 09:50:07,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 09:50:07,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 09:50:07,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 09:50:07,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 09:50:07,284 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 09:50:07,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 09:50:07,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 09:50:07,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 09:50:07,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 09:50:07,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 09:50:07,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 09:50:07,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 09:50:07,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 09:50:07,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 09:50:07,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 09:50:07,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 09:50:07,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 09:50:07,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 09:50:07,291 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 09:50:07,292 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 09:50:07,308 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 09:50:07,309 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 09:50:07,309 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 09:50:07,309 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 09:50:07,310 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 09:50:07,310 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 09:50:07,310 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 09:50:07,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 09:50:07,311 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 09:50:07,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 09:50:07,312 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 09:50:07,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 09:50:07,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 09:50:07,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 09:50:07,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 09:50:07,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 09:50:07,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 09:50:07,313 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 09:50:07,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 09:50:07,313 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 09:50:07,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 09:50:07,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 09:50:07,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 09:50:07,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 09:50:07,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:50:07,314 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 09:50:07,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 09:50:07,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 09:50:07,314 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 09:50:07,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 09:50:07,314 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 09:50:07,315 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 09:50:07,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 09:50:07,315 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 09:50:07,315 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49688e6ac5964d079e81b93cbef6c2e6f5f14699441dc6a4423fa686d49b3f7f [2021-12-21 09:50:07,480 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 09:50:07,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 09:50:07,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 09:50:07,518 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 09:50:07,518 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 09:50:07,519 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_01.i [2021-12-21 09:50:07,573 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84e11328e/afd5ee1fe4924034886a6a22025f0175/FLAG6453658b2 [2021-12-21 09:50:07,921 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 09:50:07,921 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_01.i [2021-12-21 09:50:07,933 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84e11328e/afd5ee1fe4924034886a6a22025f0175/FLAG6453658b2 [2021-12-21 09:50:08,352 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84e11328e/afd5ee1fe4924034886a6a22025f0175 [2021-12-21 09:50:08,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 09:50:08,355 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 09:50:08,356 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 09:50:08,356 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 09:50:08,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 09:50:08,359 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:50:08" (1/1) ... [2021-12-21 09:50:08,360 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f1e0a20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:50:08, skipping insertion in model container [2021-12-21 09:50:08,360 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:50:08" (1/1) ... [2021-12-21 09:50:08,365 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 09:50:08,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 09:50:08,508 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/array-examples/standard_two_index_01.i[814,827] [2021-12-21 09:50:08,517 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:50:08,522 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 09:50:08,530 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/array-examples/standard_two_index_01.i[814,827] [2021-12-21 09:50:08,535 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:50:08,544 INFO L208 MainTranslator]: Completed translation [2021-12-21 09:50:08,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:50:08 WrapperNode [2021-12-21 09:50:08,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 09:50:08,545 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 09:50:08,546 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 09:50:08,546 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 09:50:08,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:50:08" (1/1) ... [2021-12-21 09:50:08,556 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:50:08" (1/1) ... [2021-12-21 09:50:08,575 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2021-12-21 09:50:08,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 09:50:08,577 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 09:50:08,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 09:50:08,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 09:50:08,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:50:08" (1/1) ... [2021-12-21 09:50:08,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:50:08" (1/1) ... [2021-12-21 09:50:08,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:50:08" (1/1) ... [2021-12-21 09:50:08,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:50:08" (1/1) ... [2021-12-21 09:50:08,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:50:08" (1/1) ... [2021-12-21 09:50:08,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:50:08" (1/1) ... [2021-12-21 09:50:08,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:50:08" (1/1) ... [2021-12-21 09:50:08,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 09:50:08,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 09:50:08,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 09:50:08,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 09:50:08,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:50:08" (1/1) ... [2021-12-21 09:50:08,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:50:08,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:50:08,619 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 09:50:08,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 09:50:08,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 09:50:08,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 09:50:08,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 09:50:08,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 09:50:08,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 09:50:08,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 09:50:08,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 09:50:08,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 09:50:08,698 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 09:50:08,699 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 09:50:08,831 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 09:50:08,837 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 09:50:08,838 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 09:50:08,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:50:08 BoogieIcfgContainer [2021-12-21 09:50:08,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 09:50:08,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 09:50:08,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 09:50:08,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 09:50:08,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:50:08" (1/3) ... [2021-12-21 09:50:08,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2faf6ab3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:50:08, skipping insertion in model container [2021-12-21 09:50:08,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:50:08" (2/3) ... [2021-12-21 09:50:08,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2faf6ab3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:50:08, skipping insertion in model container [2021-12-21 09:50:08,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:50:08" (3/3) ... [2021-12-21 09:50:08,848 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_01.i [2021-12-21 09:50:08,852 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 09:50:08,853 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 09:50:08,902 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 09:50:08,910 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 09:50:08,910 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 09:50:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:50:08,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 09:50:08,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:50:08,943 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:50:08,943 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:50:08,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:50:08,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2021-12-21 09:50:08,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:50:08,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128037191] [2021-12-21 09:50:08,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:50:08,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:50:09,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:50:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:50:09,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:50:09,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128037191] [2021-12-21 09:50:09,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128037191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:50:09,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 09:50:09,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 09:50:09,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755955331] [2021-12-21 09:50:09,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:50:09,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 09:50:09,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:50:09,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 09:50:09,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 09:50:09,137 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:50:09,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:50:09,174 INFO L93 Difference]: Finished difference Result 34 states and 51 transitions. [2021-12-21 09:50:09,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 09:50:09,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-12-21 09:50:09,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:50:09,200 INFO L225 Difference]: With dead ends: 34 [2021-12-21 09:50:09,200 INFO L226 Difference]: Without dead ends: 18 [2021-12-21 09:50:09,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 09:50:09,207 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:50:09,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 20 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:50:09,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-21 09:50:09,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2021-12-21 09:50:09,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:50:09,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-12-21 09:50:09,244 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2021-12-21 09:50:09,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:50:09,245 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-12-21 09:50:09,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:50:09,245 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-12-21 09:50:09,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 09:50:09,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:50:09,246 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:50:09,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 09:50:09,246 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:50:09,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:50:09,247 INFO L85 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2021-12-21 09:50:09,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:50:09,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370229695] [2021-12-21 09:50:09,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:50:09,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:50:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:50:09,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 09:50:09,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:50:09,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370229695] [2021-12-21 09:50:09,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370229695] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:50:09,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656554279] [2021-12-21 09:50:09,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:50:09,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:50:09,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:50:09,289 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:50:09,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 09:50:09,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:50:09,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 09:50:09,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:50:09,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 09:50:09,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:50:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 09:50:09,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656554279] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:50:09,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:50:09,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-21 09:50:09,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656542912] [2021-12-21 09:50:09,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:50:09,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 09:50:09,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:50:09,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 09:50:09,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 09:50:09,432 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:50:09,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:50:09,470 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-12-21 09:50:09,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 09:50:09,470 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 11 [2021-12-21 09:50:09,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:50:09,471 INFO L225 Difference]: With dead ends: 44 [2021-12-21 09:50:09,471 INFO L226 Difference]: Without dead ends: 35 [2021-12-21 09:50:09,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 09:50:09,472 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:50:09,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 23 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:50:09,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-21 09:50:09,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 19. [2021-12-21 09:50:09,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:50:09,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-12-21 09:50:09,477 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 11 [2021-12-21 09:50:09,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:50:09,477 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-12-21 09:50:09,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:50:09,477 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-12-21 09:50:09,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 09:50:09,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:50:09,478 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:50:09,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 09:50:09,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:50:09,692 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:50:09,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:50:09,692 INFO L85 PathProgramCache]: Analyzing trace with hash -57020904, now seen corresponding path program 2 times [2021-12-21 09:50:09,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:50:09,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268298101] [2021-12-21 09:50:09,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:50:09,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:50:09,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:50:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 09:50:09,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:50:09,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268298101] [2021-12-21 09:50:09,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268298101] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:50:09,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962248116] [2021-12-21 09:50:09,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 09:50:09,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:50:09,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:50:09,835 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:50:09,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 09:50:09,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 09:50:09,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:50:09,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 09:50:09,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:50:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 09:50:09,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:50:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 09:50:10,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962248116] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:50:10,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:50:10,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-21 09:50:10,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347922233] [2021-12-21 09:50:10,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:50:10,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 09:50:10,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:50:10,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 09:50:10,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-21 09:50:10,021 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:50:10,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:50:10,107 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2021-12-21 09:50:10,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 09:50:10,107 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 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 [2021-12-21 09:50:10,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:50:10,110 INFO L225 Difference]: With dead ends: 89 [2021-12-21 09:50:10,110 INFO L226 Difference]: Without dead ends: 77 [2021-12-21 09:50:10,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-21 09:50:10,114 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 84 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:50:10,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 40 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:50:10,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-21 09:50:10,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 31. [2021-12-21 09:50:10,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 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) [2021-12-21 09:50:10,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-12-21 09:50:10,125 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 17 [2021-12-21 09:50:10,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:50:10,125 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-12-21 09:50:10,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:50:10,125 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-12-21 09:50:10,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 09:50:10,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:50:10,126 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:50:10,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 09:50:10,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-21 09:50:10,345 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:50:10,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:50:10,350 INFO L85 PathProgramCache]: Analyzing trace with hash 163360248, now seen corresponding path program 3 times [2021-12-21 09:50:10,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:50:10,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214807740] [2021-12-21 09:50:10,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:50:10,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:50:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:50:10,503 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-21 09:50:10,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:50:10,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214807740] [2021-12-21 09:50:10,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214807740] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:50:10,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976699108] [2021-12-21 09:50:10,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 09:50:10,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:50:10,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:50:10,512 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:50:10,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 09:50:10,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-21 09:50:10,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:50:10,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 09:50:10,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:50:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-21 09:50:10,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:50:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-21 09:50:11,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976699108] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:50:11,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:50:11,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-21 09:50:11,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900877283] [2021-12-21 09:50:11,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:50:11,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-21 09:50:11,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:50:11,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-21 09:50:11,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-21 09:50:11,005 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:50:11,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:50:11,160 INFO L93 Difference]: Finished difference Result 179 states and 206 transitions. [2021-12-21 09:50:11,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 09:50:11,161 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 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 29 [2021-12-21 09:50:11,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:50:11,162 INFO L225 Difference]: With dead ends: 179 [2021-12-21 09:50:11,162 INFO L226 Difference]: Without dead ends: 161 [2021-12-21 09:50:11,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-21 09:50:11,163 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 268 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:50:11,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 78 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:50:11,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-21 09:50:11,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 55. [2021-12-21 09:50:11,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:50:11,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-12-21 09:50:11,169 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 29 [2021-12-21 09:50:11,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:50:11,170 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-12-21 09:50:11,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:50:11,170 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-12-21 09:50:11,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-21 09:50:11,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:50:11,171 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:50:11,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 09:50:11,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:50:11,387 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:50:11,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:50:11,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1745446328, now seen corresponding path program 4 times [2021-12-21 09:50:11,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:50:11,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218197614] [2021-12-21 09:50:11,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:50:11,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:50:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:50:11,737 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-21 09:50:11,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:50:11,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218197614] [2021-12-21 09:50:11,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218197614] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:50:11,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053735829] [2021-12-21 09:50:11,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 09:50:11,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:50:11,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:50:11,738 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:50:11,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 09:50:11,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 09:50:11,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:50:11,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 09:50:11,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:50:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-21 09:50:11,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:50:12,714 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-21 09:50:12,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053735829] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:50:12,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:50:12,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-21 09:50:12,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803735080] [2021-12-21 09:50:12,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:50:12,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-21 09:50:12,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:50:12,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-21 09:50:12,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-21 09:50:12,720 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 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) [2021-12-21 09:50:13,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:50:13,032 INFO L93 Difference]: Finished difference Result 359 states and 410 transitions. [2021-12-21 09:50:13,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-21 09:50:13,032 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 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) Word has length 53 [2021-12-21 09:50:13,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:50:13,034 INFO L225 Difference]: With dead ends: 359 [2021-12-21 09:50:13,034 INFO L226 Difference]: Without dead ends: 329 [2021-12-21 09:50:13,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-21 09:50:13,035 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 616 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 09:50:13,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 148 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 09:50:13,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-12-21 09:50:13,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 103. [2021-12-21 09:50:13,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:50:13,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2021-12-21 09:50:13,043 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 53 [2021-12-21 09:50:13,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:50:13,044 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2021-12-21 09:50:13,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 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) [2021-12-21 09:50:13,044 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2021-12-21 09:50:13,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-21 09:50:13,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:50:13,046 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:50:13,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 09:50:13,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:50:13,263 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:50:13,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:50:13,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1914156344, now seen corresponding path program 5 times [2021-12-21 09:50:13,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:50:13,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450903727] [2021-12-21 09:50:13,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:50:13,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:50:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:50:14,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2021-12-21 09:50:14,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:50:14,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450903727] [2021-12-21 09:50:14,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450903727] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:50:14,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388698222] [2021-12-21 09:50:14,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 09:50:14,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:50:14,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:50:14,216 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:50:14,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process