./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/phases_1-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-acceleration/phases_1-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bc900b1bfcaecf91bc89637deaef4e1ddf2476faf43fa7e6f1e197c315ae3982 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 09:52:27,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 09:52:27,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 09:52:27,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 09:52:27,301 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 09:52:27,302 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 09:52:27,303 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 09:52:27,304 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 09:52:27,305 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 09:52:27,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 09:52:27,306 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 09:52:27,307 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 09:52:27,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 09:52:27,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 09:52:27,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 09:52:27,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 09:52:27,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 09:52:27,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 09:52:27,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 09:52:27,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 09:52:27,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 09:52:27,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 09:52:27,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 09:52:27,315 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 09:52:27,317 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 09:52:27,317 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 09:52:27,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 09:52:27,318 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 09:52:27,318 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 09:52:27,319 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 09:52:27,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 09:52:27,319 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 09:52:27,320 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 09:52:27,320 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 09:52:27,321 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 09:52:27,321 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 09:52:27,322 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 09:52:27,322 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 09:52:27,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 09:52:27,323 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 09:52:27,323 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 09:52:27,324 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 09:52:27,336 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 09:52:27,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 09:52:27,337 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 09:52:27,337 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 09:52:27,338 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 09:52:27,338 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 09:52:27,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 09:52:27,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 09:52:27,338 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 09:52:27,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 09:52:27,339 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 09:52:27,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 09:52:27,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 09:52:27,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 09:52:27,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 09:52:27,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 09:52:27,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 09:52:27,339 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 09:52:27,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 09:52:27,340 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 09:52:27,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 09:52:27,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 09:52:27,340 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 09:52:27,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 09:52:27,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 09:52:27,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 09:52:27,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 09:52:27,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 09:52:27,341 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 09:52:27,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 09:52:27,341 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 09:52:27,341 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 09:52:27,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 09:52:27,342 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 09:52:27,342 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bc900b1bfcaecf91bc89637deaef4e1ddf2476faf43fa7e6f1e197c315ae3982 [2021-12-17 09:52:27,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 09:52:27,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 09:52:27,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 09:52:27,508 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 09:52:27,508 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 09:52:27,509 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/phases_1-1.c [2021-12-17 09:52:27,556 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/123db9567/02262846c7c842489c376d4092176e33/FLAG8ffde4605 [2021-12-17 09:52:27,908 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 09:52:27,909 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/phases_1-1.c [2021-12-17 09:52:27,912 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/123db9567/02262846c7c842489c376d4092176e33/FLAG8ffde4605 [2021-12-17 09:52:27,920 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/123db9567/02262846c7c842489c376d4092176e33 [2021-12-17 09:52:27,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 09:52:27,922 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 09:52:27,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 09:52:27,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 09:52:27,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 09:52:27,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:52:27" (1/1) ... [2021-12-17 09:52:27,926 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27b5e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:52:27, skipping insertion in model container [2021-12-17 09:52:27,926 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:52:27" (1/1) ... [2021-12-17 09:52:27,930 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 09:52:27,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 09:52:28,036 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-acceleration/phases_1-1.c[322,335] [2021-12-17 09:52:28,047 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 09:52:28,052 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 09:52:28,059 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-acceleration/phases_1-1.c[322,335] [2021-12-17 09:52:28,062 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 09:52:28,081 INFO L208 MainTranslator]: Completed translation [2021-12-17 09:52:28,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:52:28 WrapperNode [2021-12-17 09:52:28,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 09:52:28,082 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 09:52:28,082 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 09:52:28,083 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 09:52:28,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:52:28" (1/1) ... [2021-12-17 09:52:28,090 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:52:28" (1/1) ... [2021-12-17 09:52:28,100 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2021-12-17 09:52:28,100 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 09:52:28,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 09:52:28,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 09:52:28,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 09:52:28,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:52:28" (1/1) ... [2021-12-17 09:52:28,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:52:28" (1/1) ... [2021-12-17 09:52:28,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:52:28" (1/1) ... [2021-12-17 09:52:28,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:52:28" (1/1) ... [2021-12-17 09:52:28,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:52:28" (1/1) ... [2021-12-17 09:52:28,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:52:28" (1/1) ... [2021-12-17 09:52:28,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:52:28" (1/1) ... [2021-12-17 09:52:28,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 09:52:28,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 09:52:28,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 09:52:28,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 09:52:28,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:52:28" (1/1) ... [2021-12-17 09:52:28,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 09:52:28,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:52:28,143 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) [2021-12-17 09:52:28,151 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 [2021-12-17 09:52:28,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 09:52:28,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 09:52:28,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 09:52:28,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 09:52:28,218 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 09:52:28,219 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 09:52:28,278 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 09:52:28,281 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 09:52:28,281 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 09:52:28,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:52:28 BoogieIcfgContainer [2021-12-17 09:52:28,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 09:52:28,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 09:52:28,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 09:52:28,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 09:52:28,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:52:27" (1/3) ... [2021-12-17 09:52:28,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@595195f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:52:28, skipping insertion in model container [2021-12-17 09:52:28,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:52:28" (2/3) ... [2021-12-17 09:52:28,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@595195f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:52:28, skipping insertion in model container [2021-12-17 09:52:28,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:52:28" (3/3) ... [2021-12-17 09:52:28,288 INFO L111 eAbstractionObserver]: Analyzing ICFG phases_1-1.c [2021-12-17 09:52:28,291 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 09:52:28,292 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 09:52:28,322 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 09:52:28,326 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 [2021-12-17 09:52:28,327 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 09:52:28,335 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:52:28,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-17 09:52:28,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:52:28,338 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-17 09:52:28,339 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:52:28,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:52:28,342 INFO L85 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2021-12-17 09:52:28,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:52:28,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866016931] [2021-12-17 09:52:28,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:52:28,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:52:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:52:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:52:28,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:52:28,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866016931] [2021-12-17 09:52:28,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866016931] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:52:28,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:52:28,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 09:52:28,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448919379] [2021-12-17 09:52:28,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:52:28,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 09:52:28,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:52:28,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 09:52:28,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 09:52:28,471 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-12-17 09:52:28,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:52:28,481 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-12-17 09:52:28,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 09:52:28,483 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-17 09:52:28,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:52:28,488 INFO L225 Difference]: With dead ends: 20 [2021-12-17 09:52:28,489 INFO L226 Difference]: Without dead ends: 8 [2021-12-17 09:52:28,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 09:52:28,494 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:52:28,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:52:28,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-12-17 09:52:28,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-12-17 09:52:28,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:52:28,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-12-17 09:52:28,517 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-12-17 09:52:28,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:52:28,517 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-12-17 09:52:28,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-12-17 09:52:28,518 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-12-17 09:52:28,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-17 09:52:28,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:52:28,518 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-17 09:52:28,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 09:52:28,519 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:52:28,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:52:28,523 INFO L85 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2021-12-17 09:52:28,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:52:28,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880440032] [2021-12-17 09:52:28,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:52:28,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:52:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:52:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:52:28,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:52:28,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880440032] [2021-12-17 09:52:28,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880440032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:52:28,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:52:28,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 09:52:28,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706294131] [2021-12-17 09:52:28,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:52:28,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 09:52:28,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:52:28,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 09:52:28,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 09:52:28,660 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-12-17 09:52:28,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:52:28,672 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2021-12-17 09:52:28,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 09:52:28,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-17 09:52:28,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:52:28,673 INFO L225 Difference]: With dead ends: 16 [2021-12-17 09:52:28,673 INFO L226 Difference]: Without dead ends: 10 [2021-12-17 09:52:28,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 09:52:28,674 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:52:28,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 10 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:52:28,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-12-17 09:52:28,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-12-17 09:52:28,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2021-12-17 09:52:28,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-12-17 09:52:28,677 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-12-17 09:52:28,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:52:28,677 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-12-17 09:52:28,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-12-17 09:52:28,678 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-12-17 09:52:28,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-17 09:52:28,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:52:28,691 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:52:28,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 09:52:28,691 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:52:28,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:52:28,692 INFO L85 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2021-12-17 09:52:28,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:52:28,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210994514] [2021-12-17 09:52:28,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:52:28,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:52:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:52:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:52:28,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:52:28,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210994514] [2021-12-17 09:52:28,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210994514] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:52:28,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374042791] [2021-12-17 09:52:28,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:52:28,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:52:28,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:52:28,759 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 09:52:28,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 09:52:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:52:28,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 09:52:28,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:52:28,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:52:28,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:52:28,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:52:28,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374042791] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:52:28,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:52:28,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-17 09:52:28,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726113129] [2021-12-17 09:52:28,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:52:28,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 09:52:28,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:52:28,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 09:52:28,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-17 09:52:28,873 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2021-12-17 09:52:28,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:52:28,944 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2021-12-17 09:52:28,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 09:52:28,944 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-17 09:52:28,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:52:28,945 INFO L225 Difference]: With dead ends: 20 [2021-12-17 09:52:28,945 INFO L226 Difference]: Without dead ends: 14 [2021-12-17 09:52:28,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2021-12-17 09:52:28,949 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 09:52:28,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 21 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 09:52:28,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-12-17 09:52:28,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-12-17 09:52:28,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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) [2021-12-17 09:52:28,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-12-17 09:52:28,956 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2021-12-17 09:52:28,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:52:28,956 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-12-17 09:52:28,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2021-12-17 09:52:28,957 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-12-17 09:52:28,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-17 09:52:28,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:52:28,957 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:52:28,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 09:52:29,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:52:29,172 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:52:29,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:52:29,172 INFO L85 PathProgramCache]: Analyzing trace with hash 572634524, now seen corresponding path program 1 times [2021-12-17 09:52:29,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:52:29,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874578168] [2021-12-17 09:52:29,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:52:29,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:52:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:52:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:52:29,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:52:29,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874578168] [2021-12-17 09:52:29,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874578168] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:52:29,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875048562] [2021-12-17 09:52:29,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:52:29,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:52:29,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:52:29,266 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 09:52:29,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 09:52:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:52:29,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 09:52:29,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:52:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:52:29,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:52:29,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 09:52:29,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875048562] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:52:29,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:52:29,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 10 [2021-12-17 09:52:29,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537935301] [2021-12-17 09:52:29,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:52:29,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 09:52:29,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:52:29,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 09:52:29,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-17 09:52:29,452 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 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) [2021-12-17 09:52:29,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:52:29,507 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-12-17 09:52:29,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 09:52:29,507 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-17 09:52:29,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:52:29,508 INFO L225 Difference]: With dead ends: 27 [2021-12-17 09:52:29,508 INFO L226 Difference]: Without dead ends: 18 [2021-12-17 09:52:29,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-17 09:52:29,509 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:52:29,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 23 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:52:29,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-17 09:52:29,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-12-17 09:52:29,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2021-12-17 09:52:29,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-12-17 09:52:29,512 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-12-17 09:52:29,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:52:29,513 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-12-17 09:52:29,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 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) [2021-12-17 09:52:29,513 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-12-17 09:52:29,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-17 09:52:29,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:52:29,514 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:52:29,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 09:52:29,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-17 09:52:29,728 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:52:29,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:52:29,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1176853889, now seen corresponding path program 2 times [2021-12-17 09:52:29,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:52:29,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406010157] [2021-12-17 09:52:29,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:52:29,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:52:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:52:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:52:29,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:52:29,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406010157] [2021-12-17 09:52:29,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406010157] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:52:29,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339968719] [2021-12-17 09:52:29,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 09:52:29,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:52:29,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:52:29,811 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 09:52:29,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 09:52:29,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 09:52:29,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:52:29,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 09:52:29,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:52:29,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:52:29,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:52:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:52:30,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339968719] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:52:30,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:52:30,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2021-12-17 09:52:30,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615617677] [2021-12-17 09:52:30,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:52:30,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 09:52:30,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:52:30,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 09:52:30,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-17 09:52:30,006 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 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) [2021-12-17 09:52:30,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:52:30,154 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2021-12-17 09:52:30,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 09:52:30,156 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-17 09:52:30,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:52:30,157 INFO L225 Difference]: With dead ends: 37 [2021-12-17 09:52:30,157 INFO L226 Difference]: Without dead ends: 28 [2021-12-17 09:52:30,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-12-17 09:52:30,158 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 09:52:30,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 09:52:30,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-17 09:52:30,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2021-12-17 09:52:30,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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) [2021-12-17 09:52:30,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-12-17 09:52:30,161 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2021-12-17 09:52:30,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:52:30,161 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-12-17 09:52:30,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 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) [2021-12-17 09:52:30,161 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-12-17 09:52:30,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-17 09:52:30,162 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:52:30,162 INFO L514 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-12-17 09:52:30,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 09:52:30,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:52:30,362 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:52:30,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:52:30,363 INFO L85 PathProgramCache]: Analyzing trace with hash -495138033, now seen corresponding path program 3 times [2021-12-17 09:52:30,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:52:30,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588096471] [2021-12-17 09:52:30,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:52:30,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:52:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:52:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 09:52:30,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:52:30,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588096471] [2021-12-17 09:52:30,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588096471] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:52:30,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822576797] [2021-12-17 09:52:30,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 09:52:30,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:52:30,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:52:30,437 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 09:52:30,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 09:52:30,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-17 09:52:30,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:52:30,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 09:52:30,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:52:30,576 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 35 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 09:52:30,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:52:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 35 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 09:52:30,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822576797] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:52:30,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:52:30,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 16 [2021-12-17 09:52:30,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596358785] [2021-12-17 09:52:30,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:52:30,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 09:52:30,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:52:30,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 09:52:30,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-12-17 09:52:30,700 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 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) [2021-12-17 09:52:31,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:52:31,300 INFO L93 Difference]: Finished difference Result 73 states and 104 transitions. [2021-12-17 09:52:31,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 09:52:31,301 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-17 09:52:31,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:52:31,302 INFO L225 Difference]: With dead ends: 73 [2021-12-17 09:52:31,302 INFO L226 Difference]: Without dead ends: 60 [2021-12-17 09:52:31,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-12-17 09:52:31,303 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 09:52:31,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 18 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 09:52:31,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-17 09:52:31,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 37. [2021-12-17 09:52:31,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 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) [2021-12-17 09:52:31,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-12-17 09:52:31,308 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 22 [2021-12-17 09:52:31,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:52:31,308 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-12-17 09:52:31,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 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) [2021-12-17 09:52:31,308 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-12-17 09:52:31,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-17 09:52:31,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:52:31,309 INFO L514 BasicCegarLoop]: trace histogram [15, 8, 7, 1, 1, 1, 1, 1, 1] [2021-12-17 09:52:31,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 09:52:31,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:52:31,513 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:52:31,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:52:31,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1202430414, now seen corresponding path program 4 times [2021-12-17 09:52:31,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:52:31,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518487449] [2021-12-17 09:52:31,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:52:31,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:52:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:52:31,613 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 56 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-17 09:52:31,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:52:31,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518487449] [2021-12-17 09:52:31,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518487449] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:52:31,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284743809] [2021-12-17 09:52:31,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 09:52:31,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:52:31,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:52:31,615 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 09:52:31,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 09:52:31,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 09:52:31,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:52:31,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 09:52:31,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:52:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 56 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-17 09:52:31,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:52:31,988 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 56 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-17 09:52:31,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284743809] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:52:31,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:52:31,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 20 [2021-12-17 09:52:31,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525595010] [2021-12-17 09:52:31,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:52:31,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 09:52:31,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:52:31,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 09:52:31,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2021-12-17 09:52:31,989 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 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) [2021-12-17 09:52:33,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:52:33,589 INFO L93 Difference]: Finished difference Result 80 states and 108 transitions. [2021-12-17 09:52:33,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 09:52:33,589 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-17 09:52:33,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:52:33,590 INFO L225 Difference]: With dead ends: 80 [2021-12-17 09:52:33,590 INFO L226 Difference]: Without dead ends: 57 [2021-12-17 09:52:33,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-12-17 09:52:33,592 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 40 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 09:52:33,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 22 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 09:52:33,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-17 09:52:33,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-17 09:52:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 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) [2021-12-17 09:52:33,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-12-17 09:52:33,597 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 36 [2021-12-17 09:52:33,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:52:33,598 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-12-17 09:52:33,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 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) [2021-12-17 09:52:33,598 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-12-17 09:52:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-17 09:52:33,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:52:33,601 INFO L514 BasicCegarLoop]: trace histogram [25, 17, 8, 1, 1, 1, 1, 1, 1] [2021-12-17 09:52:33,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 09:52:33,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:52:33,815 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:52:33,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:52:33,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1703277844, now seen corresponding path program 5 times [2021-12-17 09:52:33,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:52:33,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159494326] [2021-12-17 09:52:33,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:52:33,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:52:33,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:52:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 270 proven. 306 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-17 09:52:34,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:52:34,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159494326] [2021-12-17 09:52:34,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159494326] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:52:34,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554932213] [2021-12-17 09:52:34,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 09:52:34,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:52:34,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:52:34,133 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 09:52:34,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 09:52:34,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-12-17 09:52:34,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:52:34,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-17 09:52:34,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:52:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 115 proven. 506 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 09:52:34,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:52:35,969 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 115 proven. 506 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 09:52:35,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554932213] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:52:35,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:52:35,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25, 26] total 50 [2021-12-17 09:52:35,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599359667] [2021-12-17 09:52:35,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:52:35,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-17 09:52:35,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:52:35,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-17 09:52:35,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=1758, Unknown=0, NotChecked=0, Total=2450 [2021-12-17 09:52:35,971 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 50 states, 50 states have (on average 2.08) internal successors, (104), 50 states have internal predecessors, (104), 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) [2021-12-17 09:52:48,666 WARN L227 SmtUtils]: Spent 5.60s on a formula simplification. DAG size of input: 139 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 09:54:40,079 WARN L227 SmtUtils]: Spent 10.76s on a formula simplification. DAG size of input: 141 DAG size of output: 15 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 09:54:40,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:54:40,088 INFO L93 Difference]: Finished difference Result 130 states and 173 transitions. [2021-12-17 09:54:40,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-17 09:54:40,089 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 50 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-17 09:54:40,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:54:40,090 INFO L225 Difference]: With dead ends: 130 [2021-12-17 09:54:40,090 INFO L226 Difference]: Without dead ends: 107 [2021-12-17 09:54:40,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 124.6s TimeCoverageRelationStatistics Valid=1842, Invalid=3413, Unknown=1, NotChecked=0, Total=5256 [2021-12-17 09:54:40,092 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 110 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 09:54:40,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 56 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 09:54:40,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-17 09:54:40,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-12-17 09:54:40,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0943396226415094) internal successors, (116), 106 states have internal predecessors, (116), 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) [2021-12-17 09:54:40,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions. [2021-12-17 09:54:40,116 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 56 [2021-12-17 09:54:40,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:54:40,116 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 116 transitions. [2021-12-17 09:54:40,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 50 states have internal predecessors, (104), 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) [2021-12-17 09:54:40,116 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions. [2021-12-17 09:54:40,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-17 09:54:40,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:54:40,118 INFO L514 BasicCegarLoop]: trace histogram [49, 41, 8, 1, 1, 1, 1, 1, 1] [2021-12-17 09:54:40,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-17 09:54:40,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:54:40,319 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:54:40,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:54:40,320 INFO L85 PathProgramCache]: Analyzing trace with hash -276089548, now seen corresponding path program 6 times [2021-12-17 09:54:40,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:54:40,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038635572] [2021-12-17 09:54:40,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:54:40,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:54:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:54:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 630 proven. 1722 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-17 09:54:41,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:54:41,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038635572] [2021-12-17 09:54:41,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038635572] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:54:41,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171709063] [2021-12-17 09:54:41,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 09:54:41,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:54:41,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:54:41,112 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 09:54:41,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 09:54:45,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2021-12-17 09:54:45,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:54:45,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-17 09:54:45,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:54:45,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 697 proven. 64 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2021-12-17 09:54:45,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:54:47,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 697 proven. 64 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2021-12-17 09:54:47,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171709063] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:54:47,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:54:47,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 11, 14] total 65 [2021-12-17 09:54:47,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603410753] [2021-12-17 09:54:47,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:54:47,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-17 09:54:47,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:54:47,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-17 09:54:47,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=974, Invalid=3186, Unknown=0, NotChecked=0, Total=4160 [2021-12-17 09:54:47,372 INFO L87 Difference]: Start difference. First operand 107 states and 116 transitions. Second operand has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 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) [2021-12-17 09:54:53,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:54:53,512 INFO L93 Difference]: Finished difference Result 155 states and 189 transitions. [2021-12-17 09:54:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-17 09:54:53,513 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-12-17 09:54:53,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:54:53,514 INFO L225 Difference]: With dead ends: 155 [2021-12-17 09:54:53,514 INFO L226 Difference]: Without dead ends: 0 [2021-12-17 09:54:53,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1250, Invalid=4450, Unknown=0, NotChecked=0, Total=5700 [2021-12-17 09:54:53,516 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 95 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 2701 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 3144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 2701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 09:54:53,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 21 Invalid, 3144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 2701 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 09:54:53,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-17 09:54:53,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-17 09:54:53,517 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) [2021-12-17 09:54:53,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-17 09:54:53,517 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 104 [2021-12-17 09:54:53,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:54:53,517 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-17 09:54:53,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 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) [2021-12-17 09:54:53,518 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-17 09:54:53,518 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-17 09:54:53,519 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 09:54:53,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 09:54:53,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:54:53,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-17 09:54:54,552 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-17 09:54:54,552 INFO L858 garLoopResultBuilder]: For program point L15-2(lines 15 21) no Hoare annotation was computed. [2021-12-17 09:54:54,552 INFO L858 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-12-17 09:54:54,552 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-17 09:54:54,552 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-17 09:54:54,552 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-17 09:54:54,553 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-12-17 09:54:54,553 INFO L858 garLoopResultBuilder]: For program point L16(lines 16 20) no Hoare annotation was computed. [2021-12-17 09:54:54,553 INFO L854 garLoopResultBuilder]: At program point L16-2(lines 15 21) the Hoare annotation is: (or (< (mod (+ |ULTIMATE.start_main_~x~0#1| 4294967295) 4294967296) 65520) (= 0 (mod |ULTIMATE.start_main_~x~0#1| 2))) [2021-12-17 09:54:54,553 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 24) no Hoare annotation was computed. [2021-12-17 09:54:54,553 INFO L858 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-12-17 09:54:54,553 INFO L861 garLoopResultBuilder]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2021-12-17 09:54:54,555 INFO L732 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1] [2021-12-17 09:54:54,556 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 09:54:54,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 09:54:54 BoogieIcfgContainer [2021-12-17 09:54:54,568 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 09:54:54,569 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 09:54:54,569 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 09:54:54,570 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 09:54:54,570 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:52:28" (3/4) ... [2021-12-17 09:54:54,572 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-17 09:54:54,577 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-12-17 09:54:54,577 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-17 09:54:54,577 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-17 09:54:54,577 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-17 09:54:54,592 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 09:54:54,592 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 09:54:54,592 INFO L158 Benchmark]: Toolchain (without parser) took 146670.36ms. Allocated memory was 109.1MB in the beginning and 159.4MB in the end (delta: 50.3MB). Free memory was 85.2MB in the beginning and 85.4MB in the end (delta: -259.1kB). Peak memory consumption was 51.9MB. Max. memory is 16.1GB. [2021-12-17 09:54:54,593 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 109.1MB. Free memory is still 66.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 09:54:54,593 INFO L158 Benchmark]: CACSL2BoogieTranslator took 159.01ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 84.9MB in the beginning and 108.5MB in the end (delta: -23.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 09:54:54,593 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.24ms. Allocated memory is still 132.1MB. Free memory was 108.5MB in the beginning and 106.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 09:54:54,593 INFO L158 Benchmark]: Boogie Preprocessor took 17.13ms. Allocated memory is still 132.1MB. Free memory was 106.9MB in the beginning and 106.2MB in the end (delta: 670.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 09:54:54,593 INFO L158 Benchmark]: RCFGBuilder took 163.43ms. Allocated memory is still 132.1MB. Free memory was 105.9MB in the beginning and 97.3MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 09:54:54,594 INFO L158 Benchmark]: TraceAbstraction took 146284.52ms. Allocated memory was 132.1MB in the beginning and 159.4MB in the end (delta: 27.3MB). Free memory was 97.0MB in the beginning and 87.5MB in the end (delta: 9.5MB). Peak memory consumption was 87.4MB. Max. memory is 16.1GB. [2021-12-17 09:54:54,594 INFO L158 Benchmark]: Witness Printer took 22.66ms. Allocated memory is still 159.4MB. Free memory was 87.5MB in the beginning and 85.4MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-17 09:54:54,595 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 109.1MB. Free memory is still 66.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 159.01ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 84.9MB in the beginning and 108.5MB in the end (delta: -23.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.24ms. Allocated memory is still 132.1MB. Free memory was 108.5MB in the beginning and 106.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.13ms. Allocated memory is still 132.1MB. Free memory was 106.9MB in the beginning and 106.2MB in the end (delta: 670.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 163.43ms. Allocated memory is still 132.1MB. Free memory was 105.9MB in the beginning and 97.3MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 146284.52ms. Allocated memory was 132.1MB in the beginning and 159.4MB in the end (delta: 27.3MB). Free memory was 97.0MB in the beginning and 87.5MB in the end (delta: 9.5MB). Peak memory consumption was 87.4MB. Max. memory is 16.1GB. * Witness Printer took 22.66ms. Allocated memory is still 159.4MB. Free memory was 87.5MB in the beginning and 85.4MB in the end (delta: 2.1MB). 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: 7]: 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 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 146.2s, OverallIterations: 9, TraceHistogramMax: 49, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 132.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 278 SdHoareTripleChecker+Valid, 2.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 278 mSDsluCounter, 208 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 152 mSDsCounter, 783 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4131 IncrementalHoareTripleChecker+Invalid, 4914 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 783 mSolverCounterUnsat, 56 mSDtfsCounter, 4131 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 667 GetRequests, 439 SyntacticMatches, 6 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 134.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=107occurred in iteration=8, InterpolantAutomatonStates: 165, 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, 9 MinimizatonAttempts, 30 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 67 NumberOfFragments, 14 HoareAnnotationTreeSize, 2 FomulaSimplifications, 45228 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 2 FomulaSimplificationsInter, 2805 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 4.7s SatisfiabilityAnalysisTime, 5.9s InterpolantComputationTime, 516 NumberOfCodeBlocks, 484 NumberOfCodeBlocksAsserted, 84 NumberOfCheckSat, 745 ConstructedInterpolants, 0 QuantifiedInterpolants, 3632 SizeOfPredicates, 7 NumberOfNonLiveVariables, 601 ConjunctsInSsa, 128 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 6572/10023 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: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: (x + 4294967295) % 4294967296 < 65520 || 0 == x % 2 RESULT: Ultimate proved your program to be correct! [2021-12-17 09:54:54,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE