./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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-scaling/ps5-ll_unwindbound1.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 7bf1fedabded59b54ffeedfdca15b4d2afc329082dbabcf446dea84149cd8668 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 11:11:53,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 11:11:53,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 11:11:53,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 11:11:53,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 11:11:53,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 11:11:53,598 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 11:11:53,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 11:11:53,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 11:11:53,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 11:11:53,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 11:11:53,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 11:11:53,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 11:11:53,610 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 11:11:53,611 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 11:11:53,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 11:11:53,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 11:11:53,613 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 11:11:53,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 11:11:53,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 11:11:53,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 11:11:53,622 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 11:11:53,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 11:11:53,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 11:11:53,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 11:11:53,628 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 11:11:53,628 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 11:11:53,629 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 11:11:53,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 11:11:53,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 11:11:53,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 11:11:53,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 11:11:53,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 11:11:53,632 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 11:11:53,633 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 11:11:53,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 11:11:53,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 11:11:53,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 11:11:53,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 11:11:53,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 11:11:53,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 11:11:53,635 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 11:11:53,664 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 11:11:53,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 11:11:53,665 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 11:11:53,665 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 11:11:53,666 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 11:11:53,666 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 11:11:53,666 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 11:11:53,666 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 11:11:53,667 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 11:11:53,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 11:11:53,667 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 11:11:53,668 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 11:11:53,668 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 11:11:53,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 11:11:53,668 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 11:11:53,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 11:11:53,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 11:11:53,669 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 11:11:53,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 11:11:53,669 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 11:11:53,669 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 11:11:53,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 11:11:53,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 11:11:53,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 11:11:53,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:11:53,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 11:11:53,670 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 11:11:53,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 11:11:53,671 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 11:11:53,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 11:11:53,671 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 11:11:53,671 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 11:11:53,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 11:11:53,672 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 11:11:53,672 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7bf1fedabded59b54ffeedfdca15b4d2afc329082dbabcf446dea84149cd8668 [2021-12-22 11:11:53,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 11:11:53,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 11:11:53,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 11:11:53,864 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 11:11:53,864 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 11:11:53,865 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound1.c [2021-12-22 11:11:53,902 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23738047b/bb71663b236346e891456bc606244a31/FLAG6c9b45603 [2021-12-22 11:11:54,245 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 11:11:54,245 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound1.c [2021-12-22 11:11:54,249 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23738047b/bb71663b236346e891456bc606244a31/FLAG6c9b45603 [2021-12-22 11:11:54,258 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23738047b/bb71663b236346e891456bc606244a31 [2021-12-22 11:11:54,260 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 11:11:54,261 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 11:11:54,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 11:11:54,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 11:11:54,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 11:11:54,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:11:54" (1/1) ... [2021-12-22 11:11:54,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8c4a0b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:11:54, skipping insertion in model container [2021-12-22 11:11:54,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:11:54" (1/1) ... [2021-12-22 11:11:54,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 11:11:54,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 11:11:54,381 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-scaling/ps5-ll_unwindbound1.c[458,471] [2021-12-22 11:11:54,390 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:11:54,397 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 11:11:54,408 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-scaling/ps5-ll_unwindbound1.c[458,471] [2021-12-22 11:11:54,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:11:54,435 INFO L208 MainTranslator]: Completed translation [2021-12-22 11:11:54,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:11:54 WrapperNode [2021-12-22 11:11:54,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 11:11:54,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 11:11:54,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 11:11:54,436 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 11:11:54,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:11:54" (1/1) ... [2021-12-22 11:11:54,444 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:11:54" (1/1) ... [2021-12-22 11:11:54,462 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2021-12-22 11:11:54,462 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 11:11:54,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 11:11:54,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 11:11:54,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 11:11:54,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:11:54" (1/1) ... [2021-12-22 11:11:54,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:11:54" (1/1) ... [2021-12-22 11:11:54,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:11:54" (1/1) ... [2021-12-22 11:11:54,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:11:54" (1/1) ... [2021-12-22 11:11:54,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:11:54" (1/1) ... [2021-12-22 11:11:54,475 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:11:54" (1/1) ... [2021-12-22 11:11:54,475 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:11:54" (1/1) ... [2021-12-22 11:11:54,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 11:11:54,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 11:11:54,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 11:11:54,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 11:11:54,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:11:54" (1/1) ... [2021-12-22 11:11:54,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:11:54,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:11:54,504 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) [2021-12-22 11:11:54,513 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 [2021-12-22 11:11:54,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 11:11:54,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 11:11:54,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 11:11:54,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 11:11:54,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 11:11:54,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 11:11:54,583 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 11:11:54,583 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 11:11:54,652 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 11:11:54,656 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 11:11:54,656 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 11:11:54,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:11:54 BoogieIcfgContainer [2021-12-22 11:11:54,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 11:11:54,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 11:11:54,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 11:11:54,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 11:11:54,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:11:54" (1/3) ... [2021-12-22 11:11:54,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@be7cd04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:11:54, skipping insertion in model container [2021-12-22 11:11:54,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:11:54" (2/3) ... [2021-12-22 11:11:54,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@be7cd04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:11:54, skipping insertion in model container [2021-12-22 11:11:54,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:11:54" (3/3) ... [2021-12-22 11:11:54,663 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound1.c [2021-12-22 11:11:54,666 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 11:11:54,666 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 11:11:54,701 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 11:11:54,710 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 [2021-12-22 11:11:54,710 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 11:11:54,719 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 11:11:54,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-22 11:11:54,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:11:54,722 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:11:54,723 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:11:54,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:11:54,729 INFO L85 PathProgramCache]: Analyzing trace with hash -579246775, now seen corresponding path program 1 times [2021-12-22 11:11:54,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:11:54,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700705434] [2021-12-22 11:11:54,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:11:54,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:11:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:11:54,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:11:54,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:11:54,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700705434] [2021-12-22 11:11:54,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700705434] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:11:54,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:11:54,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 11:11:54,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434915259] [2021-12-22 11:11:54,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:11:54,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 11:11:54,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:11:54,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 11:11:54,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 11:11:54,846 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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) [2021-12-22 11:11:54,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:11:54,862 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2021-12-22 11:11:54,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 11:11:54,863 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 [2021-12-22 11:11:54,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:11:54,868 INFO L225 Difference]: With dead ends: 37 [2021-12-22 11:11:54,868 INFO L226 Difference]: Without dead ends: 16 [2021-12-22 11:11:54,878 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 [2021-12-22 11:11:54,885 INFO L933 BasicCegarLoop]: 23 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, 23 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 [2021-12-22 11:11:54,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:11:54,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-22 11:11:54,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-22 11:11:54,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 11:11:54,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-12-22 11:11:54,917 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2021-12-22 11:11:54,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:11:54,917 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-12-22 11:11:54,918 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) [2021-12-22 11:11:54,918 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-12-22 11:11:54,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 11:11:54,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:11:54,919 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:11:54,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 11:11:54,920 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:11:54,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:11:54,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1986551203, now seen corresponding path program 1 times [2021-12-22 11:11:54,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:11:54,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147322633] [2021-12-22 11:11:54,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:11:54,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:11:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:11:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:11:54,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:11:54,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147322633] [2021-12-22 11:11:54,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147322633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:11:54,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:11:54,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:11:54,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186134187] [2021-12-22 11:11:54,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:11:54,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:11:54,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:11:54,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:11:54,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:11:54,986 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-12-22 11:11:55,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:11:55,008 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-12-22 11:11:55,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:11:55,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2021-12-22 11:11:55,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:11:55,009 INFO L225 Difference]: With dead ends: 26 [2021-12-22 11:11:55,009 INFO L226 Difference]: Without dead ends: 18 [2021-12-22 11:11:55,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:11:55,014 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:11:55,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:11:55,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-22 11:11:55,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-22 11:11:55,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 11:11:55,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-12-22 11:11:55,024 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2021-12-22 11:11:55,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:11:55,025 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-12-22 11:11:55,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-12-22 11:11:55,026 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-12-22 11:11:55,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 11:11:55,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:11:55,028 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:11:55,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 11:11:55,030 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:11:55,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:11:55,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1984763743, now seen corresponding path program 1 times [2021-12-22 11:11:55,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:11:55,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012541090] [2021-12-22 11:11:55,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:11:55,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:11:55,047 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 11:11:55,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920392452] [2021-12-22 11:11:55,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:11:55,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:11:55,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:11:55,049 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) [2021-12-22 11:11:55,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 11:11:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:11:55,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 11:11:55,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:11:55,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:11:55,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 11:11:55,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:11:55,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012541090] [2021-12-22 11:11:55,180 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 11:11:55,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920392452] [2021-12-22 11:11:55,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920392452] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:11:55,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:11:55,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:11:55,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990775111] [2021-12-22 11:11:55,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:11:55,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:11:55,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:11:55,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:11:55,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:11:55,183 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-12-22 11:11:55,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:11:55,229 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-12-22 11:11:55,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:11:55,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 10 [2021-12-22 11:11:55,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:11:55,231 INFO L225 Difference]: With dead ends: 28 [2021-12-22 11:11:55,231 INFO L226 Difference]: Without dead ends: 24 [2021-12-22 11:11:55,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:11:55,232 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:11:55,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 62 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:11:55,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-22 11:11:55,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-22 11:11:55,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 11:11:55,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-22 11:11:55,255 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2021-12-22 11:11:55,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:11:55,256 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-22 11:11:55,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-12-22 11:11:55,256 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-22 11:11:55,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-22 11:11:55,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:11:55,257 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:11:55,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 11:11:55,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:11:55,471 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:11:55,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:11:55,472 INFO L85 PathProgramCache]: Analyzing trace with hash -69803837, now seen corresponding path program 1 times [2021-12-22 11:11:55,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:11:55,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029103710] [2021-12-22 11:11:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:11:55,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:11:55,479 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 11:11:55,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856249408] [2021-12-22 11:11:55,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:11:55,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:11:55,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:11:55,483 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) [2021-12-22 11:11:55,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 11:11:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:11:55,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 11:11:55,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:11:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:11:55,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:11:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:11:55,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:11:55,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029103710] [2021-12-22 11:11:55,652 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 11:11:55,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856249408] [2021-12-22 11:11:55,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856249408] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 11:11:55,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 11:11:55,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-22 11:11:55,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256845993] [2021-12-22 11:11:55,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:11:55,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:11:55,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:11:55,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:11:55,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:11:55,654 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 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) [2021-12-22 11:11:55,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:11:55,679 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-12-22 11:11:55,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:11:55,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 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 [2021-12-22 11:11:55,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:11:55,680 INFO L225 Difference]: With dead ends: 30 [2021-12-22 11:11:55,680 INFO L226 Difference]: Without dead ends: 26 [2021-12-22 11:11:55,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:11:55,681 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:11:55,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 47 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:11:55,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-22 11:11:55,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-22 11:11:55,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 11:11:55,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-12-22 11:11:55,685 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2021-12-22 11:11:55,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:11:55,685 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-12-22 11:11:55,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 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) [2021-12-22 11:11:55,685 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-12-22 11:11:55,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 11:11:55,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:11:55,686 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:11:55,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 11:11:55,902 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,SelfDestructingSolverStorable3 [2021-12-22 11:11:55,902 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:11:55,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:11:55,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1744353567, now seen corresponding path program 1 times [2021-12-22 11:11:55,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:11:55,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021092995] [2021-12-22 11:11:55,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:11:55,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:11:55,911 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 11:11:55,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965008350] [2021-12-22 11:11:55,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:11:55,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:11:55,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:11:55,912 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) [2021-12-22 11:11:55,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 11:11:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 11:11:55,945 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 11:11:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 11:11:55,978 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 11:11:55,979 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-22 11:11:55,980 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-22 11:11:56,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 11:11:56,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:11:56,198 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2021-12-22 11:11:56,199 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 11:11:56,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 11:11:56 BoogieIcfgContainer [2021-12-22 11:11:56,215 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 11:11:56,216 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 11:11:56,216 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 11:11:56,216 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 11:11:56,216 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:11:54" (3/4) ... [2021-12-22 11:11:56,218 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-22 11:11:56,243 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-22 11:11:56,244 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 11:11:56,244 INFO L158 Benchmark]: Toolchain (without parser) took 1983.26ms. Allocated memory was 88.1MB in the beginning and 115.3MB in the end (delta: 27.3MB). Free memory was 58.4MB in the beginning and 68.3MB in the end (delta: -9.8MB). Peak memory consumption was 18.5MB. Max. memory is 16.1GB. [2021-12-22 11:11:56,244 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 88.1MB. Free memory is still 45.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 11:11:56,245 INFO L158 Benchmark]: CACSL2BoogieTranslator took 173.61ms. Allocated memory was 88.1MB in the beginning and 115.3MB in the end (delta: 27.3MB). Free memory was 58.4MB in the beginning and 93.1MB in the end (delta: -34.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-22 11:11:56,245 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.12ms. Allocated memory is still 115.3MB. Free memory was 92.7MB in the beginning and 91.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 11:11:56,245 INFO L158 Benchmark]: Boogie Preprocessor took 13.37ms. Allocated memory is still 115.3MB. Free memory was 91.3MB in the beginning and 90.6MB in the end (delta: 667.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 11:11:56,245 INFO L158 Benchmark]: RCFGBuilder took 180.84ms. Allocated memory is still 115.3MB. Free memory was 89.9MB in the beginning and 80.8MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 11:11:56,245 INFO L158 Benchmark]: TraceAbstraction took 1556.30ms. Allocated memory is still 115.3MB. Free memory was 80.1MB in the beginning and 71.2MB in the end (delta: 8.9MB). Peak memory consumption was 11.0MB. Max. memory is 16.1GB. [2021-12-22 11:11:56,246 INFO L158 Benchmark]: Witness Printer took 27.90ms. Allocated memory is still 115.3MB. Free memory was 71.2MB in the beginning and 68.3MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-22 11:11:56,247 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 88.1MB. Free memory is still 45.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 173.61ms. Allocated memory was 88.1MB in the beginning and 115.3MB in the end (delta: 27.3MB). Free memory was 58.4MB in the beginning and 93.1MB in the end (delta: -34.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.12ms. Allocated memory is still 115.3MB. Free memory was 92.7MB in the beginning and 91.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 13.37ms. Allocated memory is still 115.3MB. Free memory was 91.3MB in the beginning and 90.6MB in the end (delta: 667.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 180.84ms. Allocated memory is still 115.3MB. Free memory was 89.9MB in the beginning and 80.8MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 1556.30ms. Allocated memory is still 115.3MB. Free memory was 80.1MB in the beginning and 71.2MB in the end (delta: 8.9MB). Peak memory consumption was 11.0MB. Max. memory is 16.1GB. * Witness Printer took 27.90ms. Allocated memory is still 115.3MB. Free memory was 71.2MB in the beginning and 68.3MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L22] CALL assume_abort_if_not(k <= 256) [L7] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L22] RET assume_abort_if_not(k <= 256) [L24] y = 0 [L25] x = 0 [L26] c = 0 VAL [c=0, counter=0, k=2, x=0, y=0] [L28] EXPR counter++ VAL [c=0, counter=1, counter++=0, k=2, x=0, y=0] [L28] COND TRUE counter++<1 [L29] CALL __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) VAL [\old(cond)=1, counter=1] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L29] RET __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) VAL [c=0, counter=1, k=2, x=0, y=0] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [c=1, counter=1, k=2, x=1, y=1] [L28] EXPR counter++ VAL [c=1, counter=2, counter++=1, k=2, x=1, y=1] [L28] COND FALSE !(counter++<1) [L39] CALL __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) VAL [\old(cond)=1, counter=2] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L39] RET __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) VAL [c=1, counter=2, k=2, x=1, y=1] [L40] CALL __VERIFIER_assert(k*y == y*y) VAL [\old(cond)=0, counter=2] [L10] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=2] [L12] reach_error() VAL [\old(cond)=0, cond=0, counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.5s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 15 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12 mSDsluCounter, 177 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 106 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 49 IncrementalHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 71 mSDtfsCounter, 49 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=4, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 70 NumberOfCodeBlocks, 70 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 349 SizeOfPredicates, 2 NumberOfNonLiveVariables, 129 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 6/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-12-22 11:11:56,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE