./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/apache-escape-absolute.i --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/loop-invgen/apache-escape-absolute.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b5097186312a07da16ab8fdeadf6c0d6b4634620407ae37986153d9e0823e6f5 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 10:39:43,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 10:39:43,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 10:39:43,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 10:39:43,615 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 10:39:43,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 10:39:43,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 10:39:43,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 10:39:43,619 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 10:39:43,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 10:39:43,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 10:39:43,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 10:39:43,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 10:39:43,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 10:39:43,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 10:39:43,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 10:39:43,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 10:39:43,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 10:39:43,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 10:39:43,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 10:39:43,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 10:39:43,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 10:39:43,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 10:39:43,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 10:39:43,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 10:39:43,632 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 10:39:43,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 10:39:43,633 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 10:39:43,634 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 10:39:43,634 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 10:39:43,634 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 10:39:43,635 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 10:39:43,636 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 10:39:43,636 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 10:39:43,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 10:39:43,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 10:39:43,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 10:39:43,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 10:39:43,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 10:39:43,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 10:39:43,639 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 10:39:43,640 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 10:39:43,661 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 10:39:43,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 10:39:43,662 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 10:39:43,662 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 10:39:43,662 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 10:39:43,662 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 10:39:43,663 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 10:39:43,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 10:39:43,668 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 10:39:43,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 10:39:43,668 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 10:39:43,668 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 10:39:43,668 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 10:39:43,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 10:39:43,669 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 10:39:43,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 10:39:43,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 10:39:43,669 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 10:39:43,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 10:39:43,670 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 10:39:43,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 10:39:43,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 10:39:43,670 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 10:39:43,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 10:39:43,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:39:43,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 10:39:43,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 10:39:43,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 10:39:43,671 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 10:39:43,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 10:39:43,672 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 10:39:43,672 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 10:39:43,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 10:39:43,674 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 10:39:43,674 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b5097186312a07da16ab8fdeadf6c0d6b4634620407ae37986153d9e0823e6f5 [2021-12-22 10:39:43,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 10:39:43,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 10:39:43,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 10:39:43,929 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 10:39:43,943 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 10:39:43,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/apache-escape-absolute.i [2021-12-22 10:39:44,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1b2a5e2f/870376c830ca455aa87938f21bcd835d/FLAGed0cfe1bf [2021-12-22 10:39:44,478 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 10:39:44,479 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/apache-escape-absolute.i [2021-12-22 10:39:44,486 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1b2a5e2f/870376c830ca455aa87938f21bcd835d/FLAGed0cfe1bf [2021-12-22 10:39:44,853 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1b2a5e2f/870376c830ca455aa87938f21bcd835d [2021-12-22 10:39:44,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 10:39:44,856 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 10:39:44,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 10:39:44,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 10:39:44,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 10:39:44,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:39:44" (1/1) ... [2021-12-22 10:39:44,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1566240a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:39:44, skipping insertion in model container [2021-12-22 10:39:44,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:39:44" (1/1) ... [2021-12-22 10:39:44,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 10:39:44,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 10:39:45,019 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/loop-invgen/apache-escape-absolute.i[893,906] [2021-12-22 10:39:45,043 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:39:45,048 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 10:39:45,056 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/loop-invgen/apache-escape-absolute.i[893,906] [2021-12-22 10:39:45,062 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:39:45,070 INFO L208 MainTranslator]: Completed translation [2021-12-22 10:39:45,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:39:45 WrapperNode [2021-12-22 10:39:45,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 10:39:45,071 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 10:39:45,071 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 10:39:45,071 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 10:39:45,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:39:45" (1/1) ... [2021-12-22 10:39:45,080 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:39:45" (1/1) ... [2021-12-22 10:39:45,091 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 106 [2021-12-22 10:39:45,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 10:39:45,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 10:39:45,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 10:39:45,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 10:39:45,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:39:45" (1/1) ... [2021-12-22 10:39:45,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:39:45" (1/1) ... [2021-12-22 10:39:45,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:39:45" (1/1) ... [2021-12-22 10:39:45,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:39:45" (1/1) ... [2021-12-22 10:39:45,101 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:39:45" (1/1) ... [2021-12-22 10:39:45,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:39:45" (1/1) ... [2021-12-22 10:39:45,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:39:45" (1/1) ... [2021-12-22 10:39:45,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 10:39:45,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 10:39:45,106 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 10:39:45,106 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 10:39:45,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:39:45" (1/1) ... [2021-12-22 10:39:45,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:39:45,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:39:45,136 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 10:39:45,141 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 10:39:45,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 10:39:45,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 10:39:45,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 10:39:45,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 10:39:45,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 10:39:45,182 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 10:39:45,236 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 10:39:45,238 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 10:39:45,482 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 10:39:45,487 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 10:39:45,487 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 10:39:45,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:39:45 BoogieIcfgContainer [2021-12-22 10:39:45,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 10:39:45,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 10:39:45,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 10:39:45,492 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 10:39:45,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:39:44" (1/3) ... [2021-12-22 10:39:45,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af17f50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:39:45, skipping insertion in model container [2021-12-22 10:39:45,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:39:45" (2/3) ... [2021-12-22 10:39:45,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af17f50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:39:45, skipping insertion in model container [2021-12-22 10:39:45,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:39:45" (3/3) ... [2021-12-22 10:39:45,494 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-escape-absolute.i [2021-12-22 10:39:45,499 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 10:39:45,499 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 10:39:45,533 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 10:39:45,546 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 10:39:45,547 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 10:39:45,558 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 32 states have internal predecessors, (47), 18 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-22 10:39:45,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 10:39:45,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:39:45,561 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:39:45,562 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:39:45,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:39:45,569 INFO L85 PathProgramCache]: Analyzing trace with hash 92647790, now seen corresponding path program 1 times [2021-12-22 10:39:45,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:39:45,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812921404] [2021-12-22 10:39:45,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:39:45,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:39:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:45,698 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 10:39:45,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:39:45,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812921404] [2021-12-22 10:39:45,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812921404] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:39:45,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:39:45,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 10:39:45,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235810585] [2021-12-22 10:39:45,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:39:45,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 10:39:45,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:39:45,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 10:39:45,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 10:39:45,740 INFO L87 Difference]: Start difference. First operand has 49 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 32 states have internal predecessors, (47), 18 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 10:39:45,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:39:45,832 INFO L93 Difference]: Finished difference Result 107 states and 201 transitions. [2021-12-22 10:39:45,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 10:39:45,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 13 [2021-12-22 10:39:45,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:39:45,840 INFO L225 Difference]: With dead ends: 107 [2021-12-22 10:39:45,840 INFO L226 Difference]: Without dead ends: 60 [2021-12-22 10:39:45,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 10:39:45,846 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 19 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:39:45,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 263 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:39:45,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-22 10:39:45,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2021-12-22 10:39:45,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 30 states have (on average 1.2) internal successors, (36), 34 states have internal predecessors, (36), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-22 10:39:45,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 76 transitions. [2021-12-22 10:39:45,890 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 76 transitions. Word has length 13 [2021-12-22 10:39:45,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:39:45,890 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 76 transitions. [2021-12-22 10:39:45,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 10:39:45,890 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 76 transitions. [2021-12-22 10:39:45,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-22 10:39:45,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:39:45,892 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:39:45,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 10:39:45,892 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:39:45,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:39:45,893 INFO L85 PathProgramCache]: Analyzing trace with hash -2083816530, now seen corresponding path program 1 times [2021-12-22 10:39:45,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:39:45,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965511169] [2021-12-22 10:39:45,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:39:45,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:39:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:45,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 10:39:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:45,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:39:45,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:39:45,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965511169] [2021-12-22 10:39:45,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965511169] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:39:45,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:39:45,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 10:39:45,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762427529] [2021-12-22 10:39:45,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:39:45,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 10:39:45,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:39:45,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 10:39:45,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:39:45,973 INFO L87 Difference]: Start difference. First operand 53 states and 76 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 10:39:46,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:39:46,087 INFO L93 Difference]: Finished difference Result 59 states and 81 transitions. [2021-12-22 10:39:46,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 10:39:46,087 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 10:39:46,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:39:46,090 INFO L225 Difference]: With dead ends: 59 [2021-12-22 10:39:46,091 INFO L226 Difference]: Without dead ends: 57 [2021-12-22 10:39:46,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-22 10:39:46,095 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 29 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:39:46,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 185 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:39:46,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-22 10:39:46,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-22 10:39:46,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 37 states have internal predecessors, (39), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-22 10:39:46,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2021-12-22 10:39:46,110 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 18 [2021-12-22 10:39:46,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:39:46,111 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2021-12-22 10:39:46,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 10:39:46,111 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2021-12-22 10:39:46,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-22 10:39:46,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:39:46,112 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:39:46,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 10:39:46,112 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:39:46,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:39:46,113 INFO L85 PathProgramCache]: Analyzing trace with hash 323306105, now seen corresponding path program 1 times [2021-12-22 10:39:46,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:39:46,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816656728] [2021-12-22 10:39:46,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:39:46,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:39:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 10:39:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 10:39:46,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 10:39:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 10:39:46,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 10:39:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-22 10:39:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-22 10:39:46,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:39:46,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816656728] [2021-12-22 10:39:46,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816656728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:39:46,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:39:46,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 10:39:46,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813897699] [2021-12-22 10:39:46,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:39:46,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 10:39:46,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:39:46,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 10:39:46,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 10:39:46,172 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-22 10:39:46,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:39:46,188 INFO L93 Difference]: Finished difference Result 86 states and 119 transitions. [2021-12-22 10:39:46,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 10:39:46,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2021-12-22 10:39:46,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:39:46,190 INFO L225 Difference]: With dead ends: 86 [2021-12-22 10:39:46,190 INFO L226 Difference]: Without dead ends: 57 [2021-12-22 10:39:46,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 10:39:46,191 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:39:46,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 123 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:39:46,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-22 10:39:46,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-22 10:39:46,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.121212121212121) internal successors, (37), 37 states have internal predecessors, (37), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-22 10:39:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2021-12-22 10:39:46,200 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 47 [2021-12-22 10:39:46,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:39:46,200 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2021-12-22 10:39:46,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-22 10:39:46,201 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2021-12-22 10:39:46,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 10:39:46,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:39:46,202 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:39:46,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 10:39:46,202 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:39:46,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:39:46,203 INFO L85 PathProgramCache]: Analyzing trace with hash -353292279, now seen corresponding path program 1 times [2021-12-22 10:39:46,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:39:46,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940770632] [2021-12-22 10:39:46,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:39:46,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:39:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 10:39:46,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 10:39:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 10:39:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 10:39:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 10:39:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 10:39:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-22 10:39:46,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:39:46,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940770632] [2021-12-22 10:39:46,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940770632] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:39:46,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:39:46,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 10:39:46,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608357428] [2021-12-22 10:39:46,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:39:46,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 10:39:46,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:39:46,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 10:39:46,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:39:46,295 INFO L87 Difference]: Start difference. First operand 57 states and 77 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-22 10:39:46,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:39:46,382 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2021-12-22 10:39:46,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 10:39:46,383 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2021-12-22 10:39:46,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:39:46,386 INFO L225 Difference]: With dead ends: 64 [2021-12-22 10:39:46,386 INFO L226 Difference]: Without dead ends: 62 [2021-12-22 10:39:46,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 10:39:46,394 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 22 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:39:46,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 153 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:39:46,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-22 10:39:46,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-12-22 10:39:46,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 40 states have internal predecessors, (40), 20 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-22 10:39:46,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2021-12-22 10:39:46,421 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 48 [2021-12-22 10:39:46,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:39:46,422 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2021-12-22 10:39:46,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-22 10:39:46,422 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2021-12-22 10:39:46,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-22 10:39:46,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:39:46,423 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:39:46,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 10:39:46,424 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:39:46,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:39:46,424 INFO L85 PathProgramCache]: Analyzing trace with hash 89962133, now seen corresponding path program 1 times [2021-12-22 10:39:46,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:39:46,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521484289] [2021-12-22 10:39:46,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:39:46,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:39:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 10:39:46,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 10:39:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 10:39:46,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 10:39:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 10:39:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 10:39:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-22 10:39:46,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 10:39:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 10:39:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-22 10:39:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 10:39:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 10:39:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-12-22 10:39:46,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:39:46,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521484289] [2021-12-22 10:39:46,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521484289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:39:46,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:39:46,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 10:39:46,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91821747] [2021-12-22 10:39:46,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:39:46,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 10:39:46,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:39:46,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 10:39:46,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:39:46,501 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-22 10:39:46,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:39:46,547 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2021-12-22 10:39:46,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 10:39:46,548 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 83 [2021-12-22 10:39:46,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:39:46,548 INFO L225 Difference]: With dead ends: 70 [2021-12-22 10:39:46,549 INFO L226 Difference]: Without dead ends: 68 [2021-12-22 10:39:46,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 10:39:46,549 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 8 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:39:46,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 265 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:39:46,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-22 10:39:46,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2021-12-22 10:39:46,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 43 states have internal predecessors, (43), 20 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-22 10:39:46,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 83 transitions. [2021-12-22 10:39:46,557 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 83 transitions. Word has length 83 [2021-12-22 10:39:46,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:39:46,557 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 83 transitions. [2021-12-22 10:39:46,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-22 10:39:46,558 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 83 transitions. [2021-12-22 10:39:46,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-22 10:39:46,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:39:46,559 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:39:46,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 10:39:46,560 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:39:46,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:39:46,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1632378009, now seen corresponding path program 1 times [2021-12-22 10:39:46,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:39:46,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051422951] [2021-12-22 10:39:46,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:39:46,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:39:46,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 10:39:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 10:39:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 10:39:46,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 10:39:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 10:39:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 10:39:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-22 10:39:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 10:39:46,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 10:39:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-22 10:39:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 10:39:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 10:39:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 10:39:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:39:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-12-22 10:39:46,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:39:46,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051422951] [2021-12-22 10:39:46,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051422951] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:39:46,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:39:46,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 10:39:46,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190335302] [2021-12-22 10:39:46,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:39:46,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 10:39:46,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:39:46,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 10:39:46,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:39:46,638 INFO L87 Difference]: Start difference. First operand 65 states and 83 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-22 10:39:46,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:39:46,689 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2021-12-22 10:39:46,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 10:39:46,689 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 88 [2021-12-22 10:39:46,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:39:46,690 INFO L225 Difference]: With dead ends: 71 [2021-12-22 10:39:46,690 INFO L226 Difference]: Without dead ends: 0 [2021-12-22 10:39:46,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 10:39:46,691 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 10 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:39:46,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 281 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:39:46,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-22 10:39:46,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-22 10:39:46,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:39:46,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-22 10:39:46,692 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 88 [2021-12-22 10:39:46,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:39:46,692 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-22 10:39:46,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-22 10:39:46,692 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-22 10:39:46,692 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-22 10:39:46,694 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-22 10:39:46,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 10:39:46,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-22 10:39:46,965 INFO L858 garLoopResultBuilder]: For program point L44(lines 44 80) no Hoare annotation was computed. [2021-12-22 10:39:46,965 INFO L858 garLoopResultBuilder]: For program point L69(lines 69 75) no Hoare annotation was computed. [2021-12-22 10:39:46,966 INFO L858 garLoopResultBuilder]: For program point L36(lines 25 83) no Hoare annotation was computed. [2021-12-22 10:39:46,966 INFO L858 garLoopResultBuilder]: For program point L69-1(lines 69 75) no Hoare annotation was computed. [2021-12-22 10:39:46,966 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-22 10:39:46,966 INFO L858 garLoopResultBuilder]: For program point L61(lines 61 79) no Hoare annotation was computed. [2021-12-22 10:39:46,966 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-22 10:39:46,966 INFO L854 garLoopResultBuilder]: At program point L53(line 53) the Hoare annotation is: (and (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2021-12-22 10:39:46,966 INFO L854 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2021-12-22 10:39:46,966 INFO L854 garLoopResultBuilder]: At program point L45-1(line 45) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2021-12-22 10:39:46,967 INFO L858 garLoopResultBuilder]: For program point L37(lines 25 83) no Hoare annotation was computed. [2021-12-22 10:39:46,967 INFO L858 garLoopResultBuilder]: For program point L54(lines 44 80) no Hoare annotation was computed. [2021-12-22 10:39:46,967 INFO L854 garLoopResultBuilder]: At program point L71(line 71) the Hoare annotation is: (and (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~c~0#1|) (<= (+ |ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~tokenlen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (not (= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|)) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2021-12-22 10:39:46,967 INFO L854 garLoopResultBuilder]: At program point L71-1(line 71) the Hoare annotation is: (and (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~c~0#1|) (<= (+ |ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~tokenlen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (not (= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|)) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2021-12-22 10:39:46,967 INFO L854 garLoopResultBuilder]: At program point L63(line 63) the Hoare annotation is: (and (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|) (= |ULTIMATE.start_main_~c~0#1| 0) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (not (= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|)) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2021-12-22 10:39:46,967 INFO L854 garLoopResultBuilder]: At program point L63-1(line 63) the Hoare annotation is: (and (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|) (= |ULTIMATE.start_main_~c~0#1| 0) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (not (= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|)) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2021-12-22 10:39:46,967 INFO L854 garLoopResultBuilder]: At program point L47-1(lines 46 52) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2021-12-22 10:39:46,967 INFO L854 garLoopResultBuilder]: At program point L47-2(lines 47 52) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2021-12-22 10:39:46,967 INFO L854 garLoopResultBuilder]: At program point L72(line 72) the Hoare annotation is: (and (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~c~0#1|) (<= (+ |ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~tokenlen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (not (= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|)) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2021-12-22 10:39:46,967 INFO L854 garLoopResultBuilder]: At program point L56(line 56) the Hoare annotation is: (and (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (not (= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|)) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2021-12-22 10:39:46,968 INFO L854 garLoopResultBuilder]: At program point L56-1(line 56) the Hoare annotation is: (and (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (not (= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|)) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2021-12-22 10:39:46,968 INFO L861 garLoopResultBuilder]: At program point L81(lines 25 83) the Hoare annotation is: true [2021-12-22 10:39:46,968 INFO L858 garLoopResultBuilder]: For program point L48(line 48) no Hoare annotation was computed. [2021-12-22 10:39:46,968 INFO L854 garLoopResultBuilder]: At program point L73(line 73) the Hoare annotation is: (and (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~c~0#1|) (<= (+ |ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~tokenlen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (not (= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|)) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2021-12-22 10:39:46,968 INFO L858 garLoopResultBuilder]: For program point L32(line 32) no Hoare annotation was computed. [2021-12-22 10:39:46,968 INFO L854 garLoopResultBuilder]: At program point L65-1(lines 64 77) the Hoare annotation is: (let ((.cse0 (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|)) (.cse1 (<= 1 |ULTIMATE.start_main_~cp~0#1|)) (.cse2 (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1)))) (or (and .cse0 (= |ULTIMATE.start_main_~c~0#1| 0) .cse1 .cse2) (and .cse0 (<= 1 |ULTIMATE.start_main_~c~0#1|) .cse1 .cse2))) [2021-12-22 10:39:46,968 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-22 10:39:46,968 INFO L858 garLoopResultBuilder]: For program point L57(lines 44 80) no Hoare annotation was computed. [2021-12-22 10:39:46,968 INFO L861 garLoopResultBuilder]: At program point L82(lines 24 83) the Hoare annotation is: true [2021-12-22 10:39:46,968 INFO L854 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (+ |ULTIMATE.start_main_~cp~0#1| 1))) (and (<= .cse0 |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (not (= .cse0 |ULTIMATE.start_main_~urilen~0#1|)) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1)))) [2021-12-22 10:39:46,968 INFO L854 garLoopResultBuilder]: At program point L49-1(line 49) the Hoare annotation is: (and (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (not (= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|)) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2021-12-22 10:39:46,968 INFO L858 garLoopResultBuilder]: For program point L33(line 33) no Hoare annotation was computed. [2021-12-22 10:39:46,968 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-22 10:39:46,968 INFO L858 garLoopResultBuilder]: For program point L50(line 50) no Hoare annotation was computed. [2021-12-22 10:39:46,968 INFO L854 garLoopResultBuilder]: At program point L42(line 42) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2021-12-22 10:39:46,969 INFO L854 garLoopResultBuilder]: At program point L42-1(line 42) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|) (<= 1 |ULTIMATE.start_main_~cp~0#1|) (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1))) [2021-12-22 10:39:46,969 INFO L854 garLoopResultBuilder]: At program point L67(line 67) the Hoare annotation is: (let ((.cse0 (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|)) (.cse1 (<= 1 |ULTIMATE.start_main_~cp~0#1|)) (.cse2 (<= (+ 2 |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~tokenlen~0#1|)) (.cse3 (not (= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|))) (.cse4 (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1)))) (or (and .cse0 (= |ULTIMATE.start_main_~c~0#1| 0) .cse1 .cse2 .cse3 .cse4) (and .cse0 (<= 1 |ULTIMATE.start_main_~c~0#1|) .cse1 .cse2 .cse3 .cse4))) [2021-12-22 10:39:46,969 INFO L858 garLoopResultBuilder]: For program point L34(line 34) no Hoare annotation was computed. [2021-12-22 10:39:46,969 INFO L854 garLoopResultBuilder]: At program point L67-1(line 67) the Hoare annotation is: (let ((.cse0 (< |ULTIMATE.start_main_~cp~0#1| |ULTIMATE.start_main_~urilen~0#1|)) (.cse1 (<= 1 |ULTIMATE.start_main_~cp~0#1|)) (.cse2 (<= (+ 2 |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~tokenlen~0#1|)) (.cse3 (not (= (+ |ULTIMATE.start_main_~cp~0#1| 1) |ULTIMATE.start_main_~urilen~0#1|))) (.cse4 (< 0 (+ |ULTIMATE.start_main_~scheme~0#1| 1)))) (or (and .cse0 (= |ULTIMATE.start_main_~c~0#1| 0) .cse1 .cse2 .cse3 .cse4) (and .cse0 (<= 1 |ULTIMATE.start_main_~c~0#1|) .cse1 .cse2 .cse3 .cse4))) [2021-12-22 10:39:46,969 INFO L858 garLoopResultBuilder]: For program point L43(line 43) no Hoare annotation was computed. [2021-12-22 10:39:46,969 INFO L858 garLoopResultBuilder]: For program point L68(line 68) no Hoare annotation was computed. [2021-12-22 10:39:46,969 INFO L858 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2021-12-22 10:39:46,969 INFO L858 garLoopResultBuilder]: For program point L35-1(lines 25 83) no Hoare annotation was computed. [2021-12-22 10:39:46,969 INFO L858 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2021-12-22 10:39:46,969 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-12-22 10:39:46,969 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2021-12-22 10:39:46,969 INFO L858 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-12-22 10:39:46,969 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-12-22 10:39:46,969 INFO L858 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-12-22 10:39:46,972 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2021-12-22 10:39:46,973 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 10:39:46,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 10:39:46 BoogieIcfgContainer [2021-12-22 10:39:46,985 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 10:39:46,986 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 10:39:46,986 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 10:39:46,986 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 10:39:46,987 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:39:45" (3/4) ... [2021-12-22 10:39:46,989 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-22 10:39:46,993 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-22 10:39:46,998 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-12-22 10:39:46,998 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-22 10:39:46,998 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-22 10:39:46,998 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-22 10:39:47,027 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-22 10:39:47,027 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 10:39:47,028 INFO L158 Benchmark]: Toolchain (without parser) took 2171.60ms. Allocated memory was 130.0MB in the beginning and 174.1MB in the end (delta: 44.0MB). Free memory was 105.9MB in the beginning and 83.2MB in the end (delta: 22.7MB). Peak memory consumption was 67.8MB. Max. memory is 16.1GB. [2021-12-22 10:39:47,028 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 130.0MB. Free memory is still 89.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 10:39:47,028 INFO L158 Benchmark]: CACSL2BoogieTranslator took 213.15ms. Allocated memory was 130.0MB in the beginning and 174.1MB in the end (delta: 44.0MB). Free memory was 105.4MB in the beginning and 147.3MB in the end (delta: -41.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 10:39:47,029 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.85ms. Allocated memory is still 174.1MB. Free memory was 147.3MB in the beginning and 145.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 10:39:47,029 INFO L158 Benchmark]: Boogie Preprocessor took 12.95ms. Allocated memory is still 174.1MB. Free memory was 145.2MB in the beginning and 144.4MB in the end (delta: 827.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 10:39:47,029 INFO L158 Benchmark]: RCFGBuilder took 382.38ms. Allocated memory is still 174.1MB. Free memory was 144.4MB in the beginning and 131.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-22 10:39:47,029 INFO L158 Benchmark]: TraceAbstraction took 1495.79ms. Allocated memory is still 174.1MB. Free memory was 131.3MB in the beginning and 86.4MB in the end (delta: 45.0MB). Peak memory consumption was 47.1MB. Max. memory is 16.1GB. [2021-12-22 10:39:47,030 INFO L158 Benchmark]: Witness Printer took 41.91ms. Allocated memory is still 174.1MB. Free memory was 86.4MB in the beginning and 83.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-22 10:39:47,031 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 130.0MB. Free memory is still 89.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 213.15ms. Allocated memory was 130.0MB in the beginning and 174.1MB in the end (delta: 44.0MB). Free memory was 105.4MB in the beginning and 147.3MB in the end (delta: -41.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.85ms. Allocated memory is still 174.1MB. Free memory was 147.3MB in the beginning and 145.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 12.95ms. Allocated memory is still 174.1MB. Free memory was 145.2MB in the beginning and 144.4MB in the end (delta: 827.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 382.38ms. Allocated memory is still 174.1MB. Free memory was 144.4MB in the beginning and 131.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 1495.79ms. Allocated memory is still 174.1MB. Free memory was 131.3MB in the beginning and 86.4MB in the end (delta: 45.0MB). Peak memory consumption was 47.1MB. Max. memory is 16.1GB. * Witness Printer took 41.91ms. Allocated memory is still 174.1MB. Free memory was 86.4MB in the beginning and 83.2MB in the end (delta: 3.1MB). 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 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 49 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.4s, OverallIterations: 6, TraceHistogramMax: 14, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 119 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 88 mSDsluCounter, 1270 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 898 mSDsCounter, 89 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 325 IncrementalHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 89 mSolverCounterUnsat, 372 mSDtfsCounter, 325 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 114 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=5, InterpolantAutomatonStates: 37, 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, 6 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 23 LocationsWithAnnotation, 73 PreInvPairs, 104 NumberOfFragments, 456 HoareAnnotationTreeSize, 73 FomulaSimplifications, 29 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 23 FomulaSimplificationsInter, 283 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 297 NumberOfCodeBlocks, 297 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 291 ConstructedInterpolants, 0 QuantifiedInterpolants, 451 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 772/772 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (cp + 1 <= urilen && 1 <= cp) && 0 < scheme + 1 - InvariantResult [Line: 64]: Loop Invariant Derived loop invariant: (((cp < urilen && c == 0) && 1 <= cp) && 0 < scheme + 1) || (((cp < urilen && 1 <= c) && 1 <= cp) && 0 < scheme + 1) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-12-22 10:39:47,069 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 Result: TRUE