./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/prodbin-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/nla-digbench/prodbin-ll.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 77bbfba272f7904e5efe099569a5ed86d54de3fd07a8ce9d48301467c5048e30 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 00:13:51,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 00:13:51,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 00:13:51,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 00:13:51,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 00:13:51,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 00:13:51,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 00:13:51,364 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 00:13:51,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 00:13:51,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 00:13:51,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 00:13:51,370 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 00:13:51,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 00:13:51,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 00:13:51,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 00:13:51,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 00:13:51,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 00:13:51,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 00:13:51,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 00:13:51,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 00:13:51,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 00:13:51,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 00:13:51,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 00:13:51,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 00:13:51,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 00:13:51,392 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 00:13:51,393 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 00:13:51,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 00:13:51,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 00:13:51,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 00:13:51,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 00:13:51,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 00:13:51,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 00:13:51,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 00:13:51,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 00:13:51,398 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 00:13:51,398 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 00:13:51,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 00:13:51,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 00:13:51,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 00:13:51,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 00:13:51,401 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 00:13:51,425 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 00:13:51,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 00:13:51,426 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 00:13:51,426 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 00:13:51,427 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 00:13:51,427 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 00:13:51,427 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 00:13:51,428 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 00:13:51,428 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 00:13:51,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 00:13:51,429 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 00:13:51,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 00:13:51,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 00:13:51,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 00:13:51,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 00:13:51,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 00:13:51,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 00:13:51,430 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 00:13:51,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 00:13:51,430 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 00:13:51,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 00:13:51,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 00:13:51,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 00:13:51,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 00:13:51,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 00:13:51,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 00:13:51,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 00:13:51,432 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 00:13:51,432 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 00:13:51,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 00:13:51,432 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 00:13:51,432 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 00:13:51,433 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 00:13:51,433 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 00:13:51,433 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77bbfba272f7904e5efe099569a5ed86d54de3fd07a8ce9d48301467c5048e30 [2021-12-16 00:13:51,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 00:13:51,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 00:13:51,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 00:13:51,627 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 00:13:51,628 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 00:13:51,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/prodbin-ll.c [2021-12-16 00:13:51,679 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33280ee17/af593526f54a409fa1abef6339672688/FLAGdbc666838 [2021-12-16 00:13:52,055 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 00:13:52,056 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/prodbin-ll.c [2021-12-16 00:13:52,059 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33280ee17/af593526f54a409fa1abef6339672688/FLAGdbc666838 [2021-12-16 00:13:52,068 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33280ee17/af593526f54a409fa1abef6339672688 [2021-12-16 00:13:52,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 00:13:52,070 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 00:13:52,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 00:13:52,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 00:13:52,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 00:13:52,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:13:52" (1/1) ... [2021-12-16 00:13:52,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e96db23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:13:52, skipping insertion in model container [2021-12-16 00:13:52,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:13:52" (1/1) ... [2021-12-16 00:13:52,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 00:13:52,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 00:13:52,213 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/nla-digbench/prodbin-ll.c[537,550] [2021-12-16 00:13:52,220 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 00:13:52,228 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 00:13:52,238 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/nla-digbench/prodbin-ll.c[537,550] [2021-12-16 00:13:52,251 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 00:13:52,259 INFO L208 MainTranslator]: Completed translation [2021-12-16 00:13:52,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:13:52 WrapperNode [2021-12-16 00:13:52,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 00:13:52,260 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 00:13:52,261 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 00:13:52,261 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 00:13:52,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:13:52" (1/1) ... [2021-12-16 00:13:52,269 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:13:52" (1/1) ... [2021-12-16 00:13:52,279 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2021-12-16 00:13:52,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 00:13:52,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 00:13:52,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 00:13:52,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 00:13:52,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:13:52" (1/1) ... [2021-12-16 00:13:52,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:13:52" (1/1) ... [2021-12-16 00:13:52,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:13:52" (1/1) ... [2021-12-16 00:13:52,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:13:52" (1/1) ... [2021-12-16 00:13:52,287 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:13:52" (1/1) ... [2021-12-16 00:13:52,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:13:52" (1/1) ... [2021-12-16 00:13:52,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:13:52" (1/1) ... [2021-12-16 00:13:52,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 00:13:52,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 00:13:52,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 00:13:52,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 00:13:52,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:13:52" (1/1) ... [2021-12-16 00:13:52,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 00:13:52,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:13:52,320 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) [2021-12-16 00:13:52,337 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 [2021-12-16 00:13:52,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 00:13:52,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 00:13:52,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 00:13:52,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 00:13:52,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 00:13:52,354 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 00:13:52,402 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 00:13:52,403 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 00:13:52,470 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 00:13:52,474 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 00:13:52,474 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-16 00:13:52,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:13:52 BoogieIcfgContainer [2021-12-16 00:13:52,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 00:13:52,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 00:13:52,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 00:13:52,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 00:13:52,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 12:13:52" (1/3) ... [2021-12-16 00:13:52,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39891001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:13:52, skipping insertion in model container [2021-12-16 00:13:52,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:13:52" (2/3) ... [2021-12-16 00:13:52,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39891001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:13:52, skipping insertion in model container [2021-12-16 00:13:52,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:13:52" (3/3) ... [2021-12-16 00:13:52,480 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll.c [2021-12-16 00:13:52,483 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 00:13:52,483 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 00:13:52,521 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 00:13:52,526 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 [2021-12-16 00:13:52,526 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 00:13:52,555 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 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) [2021-12-16 00:13:52,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-16 00:13:52,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:13:52,567 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:13:52,568 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:13:52,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:13:52,576 INFO L85 PathProgramCache]: Analyzing trace with hash -589251586, now seen corresponding path program 1 times [2021-12-16 00:13:52,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:13:52,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733642973] [2021-12-16 00:13:52,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:13:52,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:13:52,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:13:52,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:13:52,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:13:52,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733642973] [2021-12-16 00:13:52,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733642973] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:13:52,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:13:52,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 00:13:52,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038098969] [2021-12-16 00:13:52,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:13:52,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 00:13:52,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:13:52,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 00:13:52,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 00:13:52,795 INFO L87 Difference]: Start difference. First operand has 20 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 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) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:13:52,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:13:52,831 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2021-12-16 00:13:52,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 00:13:52,833 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-16 00:13:52,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:13:52,838 INFO L225 Difference]: With dead ends: 37 [2021-12-16 00:13:52,838 INFO L226 Difference]: Without dead ends: 16 [2021-12-16 00:13:52,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 00:13:52,842 INFO L933 BasicCegarLoop]: 22 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, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:13:52,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:13:52,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-16 00:13:52,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-16 00:13:52,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 00:13:52,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-12-16 00:13:52,879 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2021-12-16 00:13:52,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:13:52,879 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-12-16 00:13:52,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:13:52,880 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-12-16 00:13:52,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-16 00:13:52,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:13:52,882 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:13:52,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 00:13:52,883 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:13:52,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:13:52,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1187543236, now seen corresponding path program 1 times [2021-12-16 00:13:52,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:13:52,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740723651] [2021-12-16 00:13:52,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:13:52,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:13:52,912 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:13:52,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846411466] [2021-12-16 00:13:52,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:13:52,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:13:52,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:13:52,927 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) [2021-12-16 00:13:52,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 00:13:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:13:52,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 00:13:52,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:13:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:13:53,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:13:53,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:13:53,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740723651] [2021-12-16 00:13:53,063 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:13:53,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846411466] [2021-12-16 00:13:53,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846411466] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:13:53,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:13:53,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 00:13:53,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043790946] [2021-12-16 00:13:53,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:13:53,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:13:53,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:13:53,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:13:53,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 00:13:53,067 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:13:53,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:13:53,110 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-12-16 00:13:53,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:13:53,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-16 00:13:53,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:13:53,111 INFO L225 Difference]: With dead ends: 28 [2021-12-16 00:13:53,111 INFO L226 Difference]: Without dead ends: 26 [2021-12-16 00:13:53,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 00:13:53,112 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:13:53,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 43 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:13:53,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-16 00:13:53,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2021-12-16 00:13:53,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 00:13:53,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-12-16 00:13:53,117 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 9 [2021-12-16 00:13:53,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:13:53,118 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-12-16 00:13:53,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:13:53,118 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-12-16 00:13:53,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-16 00:13:53,119 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:13:53,119 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:13:53,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-16 00:13:53,351 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 [2021-12-16 00:13:53,352 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:13:53,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:13:53,352 INFO L85 PathProgramCache]: Analyzing trace with hash -423389445, now seen corresponding path program 1 times [2021-12-16 00:13:53,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:13:53,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075568387] [2021-12-16 00:13:53,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:13:53,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:13:53,363 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:13:53,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1059948413] [2021-12-16 00:13:53,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:13:53,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:13:53,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:13:53,365 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) [2021-12-16 00:13:53,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 00:13:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:13:53,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 00:13:53,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:13:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:13:53,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:13:53,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:13:53,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075568387] [2021-12-16 00:13:53,493 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:13:53,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059948413] [2021-12-16 00:13:53,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059948413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:13:53,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:13:53,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 00:13:53,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889582910] [2021-12-16 00:13:53,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:13:53,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:13:53,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:13:53,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:13:53,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 00:13:53,496 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 00:13:53,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:13:53,546 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-12-16 00:13:53,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:13:53,547 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-16 00:13:53,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:13:53,547 INFO L225 Difference]: With dead ends: 32 [2021-12-16 00:13:53,547 INFO L226 Difference]: Without dead ends: 25 [2021-12-16 00:13:53,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-16 00:13:53,548 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:13:53,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 40 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:13:53,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-16 00:13:53,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2021-12-16 00:13:53,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 00:13:53,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-12-16 00:13:53,552 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2021-12-16 00:13:53,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:13:53,553 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-12-16 00:13:53,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 00:13:53,553 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-12-16 00:13:53,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-16 00:13:53,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:13:53,554 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:13:53,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 00:13:53,767 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 [2021-12-16 00:13:53,767 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:13:53,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:13:53,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1566145315, now seen corresponding path program 1 times [2021-12-16 00:13:53,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:13:53,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538594286] [2021-12-16 00:13:53,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:13:53,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:13:53,778 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:13:53,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583303995] [2021-12-16 00:13:53,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:13:53,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:13:53,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:13:53,788 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) [2021-12-16 00:13:53,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 00:13:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:13:53,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 00:13:53,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:13:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:13:54,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:13:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:13:59,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:13:59,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538594286] [2021-12-16 00:13:59,340 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:13:59,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583303995] [2021-12-16 00:13:59,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583303995] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 00:13:59,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:13:59,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-12-16 00:13:59,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618664305] [2021-12-16 00:13:59,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:13:59,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 00:13:59,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:13:59,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 00:13:59,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=65, Unknown=2, NotChecked=0, Total=90 [2021-12-16 00:13:59,343 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 00:14:01,460 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-16 00:14:02,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:14:02,008 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-12-16 00:14:02,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 00:14:02,009 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-16 00:14:02,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:14:02,009 INFO L225 Difference]: With dead ends: 36 [2021-12-16 00:14:02,010 INFO L226 Difference]: Without dead ends: 34 [2021-12-16 00:14:02,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=33, Invalid=97, Unknown=2, NotChecked=0, Total=132 [2021-12-16 00:14:02,011 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-16 00:14:02,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 44 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-12-16 00:14:02,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-16 00:14:02,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-12-16 00:14:02,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 00:14:02,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-12-16 00:14:02,017 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 18 [2021-12-16 00:14:02,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:14:02,017 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-12-16 00:14:02,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 00:14:02,018 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-12-16 00:14:02,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-16 00:14:02,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:14:02,018 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:14:02,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 00:14:02,235 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 [2021-12-16 00:14:02,235 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:14:02,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:14:02,236 INFO L85 PathProgramCache]: Analyzing trace with hash 208862047, now seen corresponding path program 1 times [2021-12-16 00:14:02,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:14:02,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206294483] [2021-12-16 00:14:02,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:14:02,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:14:02,242 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:14:02,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501216892] [2021-12-16 00:14:02,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:14:02,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:14:02,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:14:02,251 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) [2021-12-16 00:14:02,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 00:14:02,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:14:02,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 00:14:02,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:14:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:14:04,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:14:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:14:04,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:14:04,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206294483] [2021-12-16 00:14:04,902 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:14:04,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501216892] [2021-12-16 00:14:04,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501216892] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:14:04,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 00:14:04,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-12-16 00:14:04,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14693565] [2021-12-16 00:14:04,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 00:14:04,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 00:14:04,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:14:04,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 00:14:04,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-12-16 00:14:04,903 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 17 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 00:14:05,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:14:05,730 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2021-12-16 00:14:05,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 00:14:05,731 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 17 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-12-16 00:14:05,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:14:05,733 INFO L225 Difference]: With dead ends: 57 [2021-12-16 00:14:05,733 INFO L226 Difference]: Without dead ends: 50 [2021-12-16 00:14:05,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-12-16 00:14:05,737 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 58 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 00:14:05,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 68 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 00:14:05,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-16 00:14:05,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-12-16 00:14:05,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.236842105263158) internal successors, (47), 40 states have internal predecessors, (47), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-16 00:14:05,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-12-16 00:14:05,756 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 18 [2021-12-16 00:14:05,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:14:05,756 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-12-16 00:14:05,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 17 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 00:14:05,757 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-12-16 00:14:05,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-16 00:14:05,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:14:05,758 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:14:05,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 00:14:05,971 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 [2021-12-16 00:14:05,971 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:14:05,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:14:05,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1499753556, now seen corresponding path program 1 times [2021-12-16 00:14:05,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:14:05,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773007011] [2021-12-16 00:14:05,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:14:05,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:14:05,996 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:14:05,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358243721] [2021-12-16 00:14:05,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:14:05,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:14:05,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:14:05,997 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) [2021-12-16 00:14:05,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 00:14:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:14:06,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 00:14:06,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:14:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 00:14:06,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:14:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 00:14:06,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:14:06,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773007011] [2021-12-16 00:14:06,155 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:14:06,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358243721] [2021-12-16 00:14:06,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358243721] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:14:06,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 00:14:06,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-12-16 00:14:06,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181439535] [2021-12-16 00:14:06,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 00:14:06,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 00:14:06,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:14:06,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 00:14:06,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:14:06,158 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 00:14:08,161 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-16 00:14:10,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-16 00:14:10,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:14:10,226 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2021-12-16 00:14:10,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 00:14:10,227 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-12-16 00:14:10,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:14:10,228 INFO L225 Difference]: With dead ends: 57 [2021-12-16 00:14:10,228 INFO L226 Difference]: Without dead ends: 50 [2021-12-16 00:14:10,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-12-16 00:14:10,229 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:14:10,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 67 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 2 Unknown, 0 Unchecked, 4.0s Time] [2021-12-16 00:14:10,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-16 00:14:10,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-12-16 00:14:10,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-16 00:14:10,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-12-16 00:14:10,240 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 24 [2021-12-16 00:14:10,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:14:10,240 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-12-16 00:14:10,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 00:14:10,241 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-12-16 00:14:10,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 00:14:10,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:14:10,242 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:14:10,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 00:14:10,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:14:10,452 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:14:10,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:14:10,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1993243494, now seen corresponding path program 1 times [2021-12-16 00:14:10,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:14:10,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886232421] [2021-12-16 00:14:10,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:14:10,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:14:10,466 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:14:10,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583956435] [2021-12-16 00:14:10,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:14:10,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:14:10,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:14:10,467 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:14:10,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 00:14:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:14:10,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-16 00:14:10,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:14:45,754 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aux_mod_aux_div_v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_12_63_64| Int) (|v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_12| Int) (|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_12| Int) (|aux_div_aux_div_v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_12_63_64| Int) (|aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_12_63_70| Int)) (let ((.cse0 (+ (* 2 (* |aux_mod_aux_div_v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_12_63_64| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_12|)) |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_12| (* 4 (* |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_12| |aux_div_aux_div_v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_12_63_64|)) (* 2 (* |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_12| |aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_12_63_70|)))) (.cse1 (* 2 |aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_12_63_70|))) (and (= (+ |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_12| (* 2 (* |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_12| |aux_mod_aux_div_v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_12_63_64|)) (* 4 (* |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_12| |aux_div_aux_div_v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_12_63_64|)) (* 2 (* |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_12| |aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_12_63_70|))) .cse0) (or (not (= (+ |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_12| (* 4 (* |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_12| (div (+ |aux_mod_aux_div_v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_12_63_64| (* |aux_div_aux_div_v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_12_63_64| 2) |aux_div_aux_mod_v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_12_63_70|) 2)))) .cse0)) (<= 1 |c___VERIFIER_assert_#in~cond|)) (< |aux_mod_aux_div_v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_12_63_64| 2) (not (= 1 |aux_mod_aux_div_v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_12_63_64|)) (<= 0 |aux_mod_aux_div_v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_12_63_64|) (<= 0 (+ (* 2 |aux_mod_aux_div_v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_12_63_64|) (* 4 |aux_div_aux_div_v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_12_63_64|) .cse1)) (<= 0 .cse1) (< .cse1 2)))) is different from true [2021-12-16 00:14:50,546 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 00:14:50,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:14:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:14:53,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:14:53,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886232421] [2021-12-16 00:14:53,095 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:14:53,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583956435] [2021-12-16 00:14:53,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583956435] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:14:53,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 00:14:53,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-12-16 00:14:53,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35084189] [2021-12-16 00:14:53,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 00:14:53,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 00:14:53,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:14:53,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 00:14:53,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=301, Unknown=3, NotChecked=36, Total=420 [2021-12-16 00:14:53,097 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 19 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 00:15:03,248 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-16 00:15:03,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:15:03,947 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2021-12-16 00:15:03,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-16 00:15:03,948 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 19 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2021-12-16 00:15:03,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:15:03,948 INFO L225 Difference]: With dead ends: 83 [2021-12-16 00:15:03,948 INFO L226 Difference]: Without dead ends: 81 [2021-12-16 00:15:03,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=274, Invalid=987, Unknown=3, NotChecked=68, Total=1332 [2021-12-16 00:15:03,949 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 68 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-16 00:15:03,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 103 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 242 Invalid, 0 Unknown, 68 Unchecked, 3.5s Time] [2021-12-16 00:15:03,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-16 00:15:03,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-12-16 00:15:03,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 60 states have (on average 1.15) internal successors, (69), 63 states have internal predecessors, (69), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-16 00:15:03,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2021-12-16 00:15:03,960 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 27 [2021-12-16 00:15:03,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:15:03,960 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2021-12-16 00:15:03,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 19 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 00:15:03,961 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2021-12-16 00:15:03,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 00:15:03,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:15:03,962 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-16 00:15:04,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 00:15:04,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:15:04,162 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:15:04,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:15:04,163 INFO L85 PathProgramCache]: Analyzing trace with hash 648870724, now seen corresponding path program 2 times [2021-12-16 00:15:04,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:15:04,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737454157] [2021-12-16 00:15:04,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:15:04,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:15:04,168 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:15:04,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097927642] [2021-12-16 00:15:04,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 00:15:04,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:15:04,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:15:04,177 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:15:04,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 00:15:04,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 00:15:04,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:15:04,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-16 00:15:04,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:15:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 00:15:06,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:15:10,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:15:10,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737454157] [2021-12-16 00:15:10,299 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:15:10,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097927642] [2021-12-16 00:15:10,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097927642] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:15:10,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:15:10,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-12-16 00:15:10,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106753548] [2021-12-16 00:15:10,300 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-16 00:15:10,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 00:15:10,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:15:10,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 00:15:10,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-12-16 00:15:10,301 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)