./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/eureka_01-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/eureka_01-2.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 fc84672deb8568f357f3e53d1889a4a141611ae62422dd83eb7a6bc6f311a8b1 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 10:35:47,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 10:35:47,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 10:35:47,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 10:35:47,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 10:35:47,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 10:35:47,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 10:35:47,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 10:35:47,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 10:35:47,216 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 10:35:47,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 10:35:47,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 10:35:47,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 10:35:47,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 10:35:47,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 10:35:47,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 10:35:47,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 10:35:47,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 10:35:47,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 10:35:47,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 10:35:47,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 10:35:47,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 10:35:47,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 10:35:47,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 10:35:47,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 10:35:47,237 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 10:35:47,237 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 10:35:47,238 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 10:35:47,238 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 10:35:47,239 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 10:35:47,239 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 10:35:47,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 10:35:47,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 10:35:47,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 10:35:47,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 10:35:47,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 10:35:47,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 10:35:47,243 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 10:35:47,243 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 10:35:47,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 10:35:47,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 10:35:47,246 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 10:35:47,271 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 10:35:47,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 10:35:47,272 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 10:35:47,272 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 10:35:47,273 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 10:35:47,273 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 10:35:47,273 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 10:35:47,273 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 10:35:47,273 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 10:35:47,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 10:35:47,274 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 10:35:47,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 10:35:47,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 10:35:47,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 10:35:47,275 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 10:35:47,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 10:35:47,275 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 10:35:47,275 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 10:35:47,276 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 10:35:47,276 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 10:35:47,276 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 10:35:47,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 10:35:47,276 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 10:35:47,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 10:35:47,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:35:47,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 10:35:47,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 10:35:47,277 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 10:35:47,277 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 10:35:47,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 10:35:47,277 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 10:35:47,278 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 10:35:47,278 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 10:35:47,278 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 10:35:47,278 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc84672deb8568f357f3e53d1889a4a141611ae62422dd83eb7a6bc6f311a8b1 [2021-12-22 10:35:47,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 10:35:47,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 10:35:47,506 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 10:35:47,507 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 10:35:47,508 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 10:35:47,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/eureka_01-2.c [2021-12-22 10:35:47,557 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3e53511f/9eb68cb74fd74f8e825def8df8a0eccc/FLAG87445a6bf [2021-12-22 10:35:47,907 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 10:35:47,908 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/eureka_01-2.c [2021-12-22 10:35:47,912 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3e53511f/9eb68cb74fd74f8e825def8df8a0eccc/FLAG87445a6bf [2021-12-22 10:35:47,920 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3e53511f/9eb68cb74fd74f8e825def8df8a0eccc [2021-12-22 10:35:47,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 10:35:47,923 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 10:35:47,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 10:35:47,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 10:35:47,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 10:35:47,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:35:47" (1/1) ... [2021-12-22 10:35:47,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ea90b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:47, skipping insertion in model container [2021-12-22 10:35:47,929 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:35:47" (1/1) ... [2021-12-22 10:35:47,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 10:35:47,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 10:35:48,078 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/loops/eureka_01-2.c[323,336] [2021-12-22 10:35:48,124 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:35:48,129 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 10:35:48,138 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/loops/eureka_01-2.c[323,336] [2021-12-22 10:35:48,164 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:35:48,174 INFO L208 MainTranslator]: Completed translation [2021-12-22 10:35:48,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:48 WrapperNode [2021-12-22 10:35:48,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 10:35:48,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 10:35:48,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 10:35:48,176 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 10:35:48,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:48" (1/1) ... [2021-12-22 10:35:48,194 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:48" (1/1) ... [2021-12-22 10:35:48,220 INFO L137 Inliner]: procedures = 13, calls = 100, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 199 [2021-12-22 10:35:48,221 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 10:35:48,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 10:35:48,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 10:35:48,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 10:35:48,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:48" (1/1) ... [2021-12-22 10:35:48,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:48" (1/1) ... [2021-12-22 10:35:48,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:48" (1/1) ... [2021-12-22 10:35:48,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:48" (1/1) ... [2021-12-22 10:35:48,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:48" (1/1) ... [2021-12-22 10:35:48,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:48" (1/1) ... [2021-12-22 10:35:48,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:48" (1/1) ... [2021-12-22 10:35:48,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 10:35:48,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 10:35:48,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 10:35:48,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 10:35:48,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:48" (1/1) ... [2021-12-22 10:35:48,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:35:48,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:35:48,285 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 10:35:48,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 10:35:48,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 10:35:48,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 10:35:48,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 10:35:48,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 10:35:48,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 10:35:48,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 10:35:48,313 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 10:35:48,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 10:35:48,374 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 10:35:48,376 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 10:35:48,588 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 10:35:48,592 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 10:35:48,592 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-22 10:35:48,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:35:48 BoogieIcfgContainer [2021-12-22 10:35:48,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 10:35:48,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 10:35:48,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 10:35:48,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 10:35:48,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:35:47" (1/3) ... [2021-12-22 10:35:48,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27290c5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:35:48, skipping insertion in model container [2021-12-22 10:35:48,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:35:48" (2/3) ... [2021-12-22 10:35:48,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27290c5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:35:48, skipping insertion in model container [2021-12-22 10:35:48,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:35:48" (3/3) ... [2021-12-22 10:35:48,599 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-2.c [2021-12-22 10:35:48,619 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 10:35:48,619 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 10:35:48,648 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 10:35:48,653 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 10:35:48,654 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 10:35:48,662 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.625) internal successors, (39), 25 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) [2021-12-22 10:35:48,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 10:35:48,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:48,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:48,666 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:48,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:48,672 INFO L85 PathProgramCache]: Analyzing trace with hash 678614248, now seen corresponding path program 1 times [2021-12-22 10:35:48,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:48,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491958452] [2021-12-22 10:35:48,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:48,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:35:48,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:48,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491958452] [2021-12-22 10:35:48,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491958452] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:35:48,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:35:48,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 10:35:48,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023302029] [2021-12-22 10:35:48,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:35:48,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 10:35:48,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:35:48,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 10:35:48,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 10:35:48,859 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.625) internal successors, (39), 25 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-12-22 10:35:48,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:35:48,875 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2021-12-22 10:35:48,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 10:35:48,877 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) Word has length 11 [2021-12-22 10:35:48,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:35:48,882 INFO L225 Difference]: With dead ends: 47 [2021-12-22 10:35:48,882 INFO L226 Difference]: Without dead ends: 22 [2021-12-22 10:35:48,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 10:35:48,889 INFO L933 BasicCegarLoop]: 33 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, 33 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:35:48,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:35:48,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-22 10:35:48,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-22 10:35:48,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 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) [2021-12-22 10:35:48,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-12-22 10:35:48,910 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 11 [2021-12-22 10:35:48,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:35:48,911 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-12-22 10:35:48,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-12-22 10:35:48,911 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-12-22 10:35:48,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 10:35:48,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:48,912 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:48,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 10:35:48,912 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:48,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:48,913 INFO L85 PathProgramCache]: Analyzing trace with hash 137869947, now seen corresponding path program 1 times [2021-12-22 10:35:48,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:48,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726345083] [2021-12-22 10:35:48,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:48,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:35:48,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:48,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726345083] [2021-12-22 10:35:48,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726345083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:35:48,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:35:48,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 10:35:48,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873350328] [2021-12-22 10:35:48,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:35:48,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 10:35:48,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:35:48,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 10:35:48,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 10:35:48,996 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-12-22 10:35:49,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:35:49,032 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2021-12-22 10:35:49,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 10:35:49,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) Word has length 11 [2021-12-22 10:35:49,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:35:49,041 INFO L225 Difference]: With dead ends: 42 [2021-12-22 10:35:49,041 INFO L226 Difference]: Without dead ends: 25 [2021-12-22 10:35:49,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 10:35:49,043 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:35:49,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:35:49,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-22 10:35:49,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2021-12-22 10:35:49,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:49,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-12-22 10:35:49,050 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 11 [2021-12-22 10:35:49,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:35:49,051 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-12-22 10:35:49,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-12-22 10:35:49,052 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-12-22 10:35:49,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-22 10:35:49,053 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:49,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:49,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 10:35:49,054 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:49,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:49,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1682093747, now seen corresponding path program 1 times [2021-12-22 10:35:49,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:49,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356993490] [2021-12-22 10:35:49,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:49,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:49,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 10:35:49,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:49,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356993490] [2021-12-22 10:35:49,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356993490] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:35:49,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:35:49,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 10:35:49,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135522903] [2021-12-22 10:35:49,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:35:49,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 10:35:49,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:35:49,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 10:35:49,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 10:35:49,125 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2021-12-22 10:35:49,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:35:49,162 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2021-12-22 10:35:49,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 10:35:49,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 14 [2021-12-22 10:35:49,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:35:49,163 INFO L225 Difference]: With dead ends: 51 [2021-12-22 10:35:49,163 INFO L226 Difference]: Without dead ends: 40 [2021-12-22 10:35:49,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 10:35:49,164 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:35:49,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 26 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:35:49,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-22 10:35:49,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2021-12-22 10:35:49,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:49,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-12-22 10:35:49,169 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 14 [2021-12-22 10:35:49,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:35:49,169 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-22 10:35:49,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2021-12-22 10:35:49,169 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-12-22 10:35:49,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 10:35:49,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:49,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:49,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 10:35:49,170 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:49,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:49,171 INFO L85 PathProgramCache]: Analyzing trace with hash 701151449, now seen corresponding path program 1 times [2021-12-22 10:35:49,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:49,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467261400] [2021-12-22 10:35:49,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:49,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 10:35:49,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:49,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467261400] [2021-12-22 10:35:49,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467261400] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:35:49,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:35:49,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 10:35:49,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558322546] [2021-12-22 10:35:49,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:35:49,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 10:35:49,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:35:49,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 10:35:49,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 10:35:49,217 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:49,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:35:49,236 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2021-12-22 10:35:49,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 10:35:49,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-22 10:35:49,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:35:49,237 INFO L225 Difference]: With dead ends: 43 [2021-12-22 10:35:49,237 INFO L226 Difference]: Without dead ends: 27 [2021-12-22 10:35:49,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 10:35:49,238 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:35:49,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 42 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:35:49,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-22 10:35:49,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-12-22 10:35:49,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:49,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-12-22 10:35:49,243 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 17 [2021-12-22 10:35:49,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:35:49,243 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-12-22 10:35:49,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:49,244 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-12-22 10:35:49,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 10:35:49,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:49,244 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:49,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 10:35:49,245 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:49,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:49,245 INFO L85 PathProgramCache]: Analyzing trace with hash -792194438, now seen corresponding path program 1 times [2021-12-22 10:35:49,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:49,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128062900] [2021-12-22 10:35:49,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:49,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 10:35:49,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:49,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128062900] [2021-12-22 10:35:49,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128062900] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:35:49,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:35:49,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 10:35:49,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720706432] [2021-12-22 10:35:49,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:35:49,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 10:35:49,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:35:49,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 10:35:49,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 10:35:49,295 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:49,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:35:49,338 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2021-12-22 10:35:49,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 10:35:49,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 20 [2021-12-22 10:35:49,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:35:49,340 INFO L225 Difference]: With dead ends: 48 [2021-12-22 10:35:49,340 INFO L226 Difference]: Without dead ends: 41 [2021-12-22 10:35:49,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 10:35:49,344 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:35:49,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 25 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:35:49,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-22 10:35:49,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-12-22 10:35:49,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:49,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-12-22 10:35:49,356 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 20 [2021-12-22 10:35:49,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:35:49,356 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-12-22 10:35:49,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:49,357 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-12-22 10:35:49,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 10:35:49,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:49,358 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:49,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 10:35:49,359 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:49,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:49,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1624635408, now seen corresponding path program 1 times [2021-12-22 10:35:49,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:49,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672430142] [2021-12-22 10:35:49,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:49,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:49,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 10:35:49,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:49,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672430142] [2021-12-22 10:35:49,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672430142] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:35:49,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552707847] [2021-12-22 10:35:49,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:49,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:49,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:35:49,428 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:35:49,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 10:35:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:49,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 10:35:49,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:35:49,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 10:35:49,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:35:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 10:35:49,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552707847] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:35:49,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:35:49,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-22 10:35:49,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968952311] [2021-12-22 10:35:49,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:35:49,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 10:35:49,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:35:49,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 10:35:49,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-22 10:35:49,727 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:49,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:35:49,762 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2021-12-22 10:35:49,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 10:35:49,762 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-22 10:35:49,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:35:49,763 INFO L225 Difference]: With dead ends: 55 [2021-12-22 10:35:49,763 INFO L226 Difference]: Without dead ends: 35 [2021-12-22 10:35:49,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-22 10:35:49,764 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:35:49,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:35:49,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-22 10:35:49,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-12-22 10:35:49,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 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) [2021-12-22 10:35:49,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-12-22 10:35:49,767 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 23 [2021-12-22 10:35:49,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:35:49,768 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-12-22 10:35:49,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:49,768 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-12-22 10:35:49,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-22 10:35:49,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:49,769 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:49,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 10:35:49,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-22 10:35:49,986 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:49,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:49,986 INFO L85 PathProgramCache]: Analyzing trace with hash 55827240, now seen corresponding path program 2 times [2021-12-22 10:35:49,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:49,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168572301] [2021-12-22 10:35:49,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:49,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:49,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:50,028 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 10:35:50,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:50,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168572301] [2021-12-22 10:35:50,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168572301] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:35:50,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103449264] [2021-12-22 10:35:50,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 10:35:50,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:50,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:35:50,030 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:35:50,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 10:35:50,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 10:35:50,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:35:50,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 10:35:50,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:35:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 10:35:50,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 10:35:50,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103449264] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:35:50,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 10:35:50,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-12-22 10:35:50,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702244294] [2021-12-22 10:35:50,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:35:50,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 10:35:50,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:35:50,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 10:35:50,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:35:50,199 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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) [2021-12-22 10:35:50,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:35:50,245 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2021-12-22 10:35:50,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 10:35:50,245 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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 32 [2021-12-22 10:35:50,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:35:50,249 INFO L225 Difference]: With dead ends: 76 [2021-12-22 10:35:50,249 INFO L226 Difference]: Without dead ends: 48 [2021-12-22 10:35:50,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:35:50,250 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:35:50,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 36 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:35:50,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-22 10:35:50,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2021-12-22 10:35:50,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:50,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-12-22 10:35:50,267 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 32 [2021-12-22 10:35:50,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:35:50,267 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-12-22 10:35:50,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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) [2021-12-22 10:35:50,268 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-12-22 10:35:50,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-22 10:35:50,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:50,268 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:50,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 10:35:50,468 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,SelfDestructingSolverStorable6 [2021-12-22 10:35:50,469 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:50,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:50,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1789747366, now seen corresponding path program 1 times [2021-12-22 10:35:50,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:50,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507851840] [2021-12-22 10:35:50,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:50,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 10:35:50,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:50,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507851840] [2021-12-22 10:35:50,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507851840] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:35:50,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070800145] [2021-12-22 10:35:50,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:50,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:50,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:35:50,541 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:35:50,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 10:35:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:50,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 10:35:50,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:35:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 10:35:50,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:35:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 10:35:50,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070800145] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:35:50,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:35:50,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-22 10:35:50,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303970907] [2021-12-22 10:35:50,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:35:50,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 10:35:50,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:35:50,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 10:35:50,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-12-22 10:35:50,822 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:50,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:35:50,881 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-12-22 10:35:50,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 10:35:50,882 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 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 32 [2021-12-22 10:35:50,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:35:50,882 INFO L225 Difference]: With dead ends: 60 [2021-12-22 10:35:50,882 INFO L226 Difference]: Without dead ends: 40 [2021-12-22 10:35:50,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-12-22 10:35:50,883 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:35:50,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 46 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:35:50,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-22 10:35:50,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-12-22 10:35:50,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 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) [2021-12-22 10:35:50,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-12-22 10:35:50,889 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 32 [2021-12-22 10:35:50,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:35:50,889 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-12-22 10:35:50,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:50,889 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-12-22 10:35:50,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-22 10:35:50,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:50,890 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:50,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 10:35:51,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:51,095 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:51,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:51,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1014530160, now seen corresponding path program 2 times [2021-12-22 10:35:51,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:51,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970713701] [2021-12-22 10:35:51,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:51,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-22 10:35:51,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:51,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970713701] [2021-12-22 10:35:51,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970713701] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:35:51,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853087437] [2021-12-22 10:35:51,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 10:35:51,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:51,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:35:51,168 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) [2021-12-22 10:35:51,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 10:35:51,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 10:35:51,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:35:51,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 10:35:51,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:35:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-22 10:35:51,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:35:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-22 10:35:51,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853087437] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:35:51,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:35:51,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-22 10:35:51,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809395154] [2021-12-22 10:35:51,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:35:51,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 10:35:51,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:35:51,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 10:35:51,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-12-22 10:35:51,400 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:51,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:35:51,450 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2021-12-22 10:35:51,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 10:35:51,451 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 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 35 [2021-12-22 10:35:51,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:35:51,452 INFO L225 Difference]: With dead ends: 65 [2021-12-22 10:35:51,452 INFO L226 Difference]: Without dead ends: 47 [2021-12-22 10:35:51,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-12-22 10:35:51,453 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:35:51,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 84 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:35:51,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-22 10:35:51,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-22 10:35:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:51,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-12-22 10:35:51,459 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 35 [2021-12-22 10:35:51,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:35:51,459 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-12-22 10:35:51,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:51,460 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-12-22 10:35:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 10:35:51,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:51,461 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:51,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 10:35:51,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:51,663 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:51,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:51,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1632294897, now seen corresponding path program 3 times [2021-12-22 10:35:51,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:51,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949568999] [2021-12-22 10:35:51,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:51,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:51,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-22 10:35:51,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:51,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949568999] [2021-12-22 10:35:51,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949568999] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:35:51,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896491847] [2021-12-22 10:35:51,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 10:35:51,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:51,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:35:51,763 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) [2021-12-22 10:35:51,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 10:35:51,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 10:35:51,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:35:51,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 10:35:51,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:35:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-22 10:35:52,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:35:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-22 10:35:52,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896491847] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:35:52,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:35:52,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2021-12-22 10:35:52,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144270112] [2021-12-22 10:35:52,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:35:52,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 10:35:52,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:35:52,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 10:35:52,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-22 10:35:52,093 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:52,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:35:52,487 INFO L93 Difference]: Finished difference Result 171 states and 220 transitions. [2021-12-22 10:35:52,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-22 10:35:52,487 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 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 44 [2021-12-22 10:35:52,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:35:52,488 INFO L225 Difference]: With dead ends: 171 [2021-12-22 10:35:52,488 INFO L226 Difference]: Without dead ends: 144 [2021-12-22 10:35:52,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=502, Invalid=980, Unknown=0, NotChecked=0, Total=1482 [2021-12-22 10:35:52,489 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 509 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:35:52,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 58 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:35:52,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-22 10:35:52,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 107. [2021-12-22 10:35:52,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.2735849056603774) internal successors, (135), 106 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:52,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 135 transitions. [2021-12-22 10:35:52,500 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 135 transitions. Word has length 44 [2021-12-22 10:35:52,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:35:52,500 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 135 transitions. [2021-12-22 10:35:52,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:52,501 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 135 transitions. [2021-12-22 10:35:52,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-22 10:35:52,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:52,502 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:52,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-22 10:35:52,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 10:35:52,721 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:52,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:52,721 INFO L85 PathProgramCache]: Analyzing trace with hash -919071665, now seen corresponding path program 4 times [2021-12-22 10:35:52,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:52,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709891817] [2021-12-22 10:35:52,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:52,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 262 proven. 35 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2021-12-22 10:35:52,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:52,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709891817] [2021-12-22 10:35:52,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709891817] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:35:52,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368486867] [2021-12-22 10:35:52,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 10:35:52,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:52,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:35:52,859 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) [2021-12-22 10:35:52,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 10:35:52,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 10:35:52,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:35:52,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 10:35:52,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:35:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 26 proven. 228 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2021-12-22 10:35:53,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:35:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 26 proven. 228 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2021-12-22 10:35:53,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368486867] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:35:53,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:35:53,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2021-12-22 10:35:53,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636373636] [2021-12-22 10:35:53,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:35:53,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-22 10:35:53,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:35:53,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-22 10:35:53,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-12-22 10:35:53,419 INFO L87 Difference]: Start difference. First operand 107 states and 135 transitions. Second operand has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:54,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:35:54,410 INFO L93 Difference]: Finished difference Result 322 states and 416 transitions. [2021-12-22 10:35:54,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-22 10:35:54,411 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 24 states have internal predecessors, (100), 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 [2021-12-22 10:35:54,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:35:54,412 INFO L225 Difference]: With dead ends: 322 [2021-12-22 10:35:54,412 INFO L226 Difference]: Without dead ends: 251 [2021-12-22 10:35:54,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1347, Invalid=4659, Unknown=0, NotChecked=0, Total=6006 [2021-12-22 10:35:54,414 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1114 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 10:35:54,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 114 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 10:35:54,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-12-22 10:35:54,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 131. [2021-12-22 10:35:54,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.2538461538461538) internal successors, (163), 130 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:54,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 163 transitions. [2021-12-22 10:35:54,426 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 163 transitions. Word has length 104 [2021-12-22 10:35:54,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:35:54,427 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 163 transitions. [2021-12-22 10:35:54,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:35:54,427 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 163 transitions. [2021-12-22 10:35:54,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-22 10:35:54,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:35:54,428 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 6, 6, 6, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:35:54,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 10:35:54,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:54,643 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:35:54,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:35:54,644 INFO L85 PathProgramCache]: Analyzing trace with hash 964759091, now seen corresponding path program 5 times [2021-12-22 10:35:54,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:35:54,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802615468] [2021-12-22 10:35:54,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:35:54,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:35:54,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:35:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 367 proven. 51 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2021-12-22 10:35:54,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:35:54,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802615468] [2021-12-22 10:35:54,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802615468] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:35:54,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601978152] [2021-12-22 10:35:54,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 10:35:54,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:35:54,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:35:54,769 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) [2021-12-22 10:35:54,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process